The CPH exploration mandate describes humanity's operating sphere as approximately 100 light years centered on Sol — the rough boundary within which a skip-drive vessel can reach any destination within a reasonable transit time. In practice, the actively explored and claimed sphere is considerably smaller: roughly 20 light years, within which every significant stellar object has been visited at least once, most have been surveyed, and a handful have been settled. What follows is the CPH Survey Corps' current assessment of notable systems within that sphere — what we found, what we're still looking at, and what has been classified pending further analysis.
Two-thirds of the 150+ objects in this volume are red dwarf stars invisible to the naked eye from Earth. Most have no planets of interest. What follows describes the ones that do — the ones that are strange, significant, or simply difficult to stop thinking about.
Status categories used in this document
Settled— permanent human population, Terra affiliation
Surveyed— visited, documented, no permanent settlement
Active interest— ongoing research, contested, or under special consideration
Restricted— classified, incident-flagged, or access controlled
The inner neighborhood — within 10 light years
Alpha Centauri / Chung Kuo — 4.37 ly
Alpha Centauri A (G2V) + Alpha Centauri B (K1V) + Proxima Centauri (M5.5V flare star) · Proxima b confirmed habitable zone planet
Settled — Chung Kuo · Independent · CPH relations: managed rivalry
The nearest stellar system is also the one humanity knows least about from the inside, because the humanity that settled it went to extraordinary lengths to ensure nobody else's humanity could look. Chung Kuo colonized the Alpha Centauri A/B system beginning in 2098 and has maintained the most rigorous exclusion zone of any human-settled system — no CPH vessels, no ICC inspection, no survey access. What is known comes from long-range observation, the sparse official diplomatic communications Chung Kuo has chosen to make, and intelligence sources whose reliability varies.
Alpha Centauri A is the system's primary habitable star — very similar to Sol in type and luminosity, with confirmed rocky planets including one with strong atmospheric indicators. Alpha Centauri B is a K-type companion that complicates planetary formation around A but does not prevent it. The A/B pair orbit each other in an 80-year period, widely enough separated that each can maintain its own planetary system. Chung Kuo's primary settlement is understood to be on a planet of Alpha Centauri A.
Proxima Centauri is the system's third member and Sol's nearest stellar neighbor, despite being 0.24 light years from the A/B pair. It is a red dwarf flare star with Proxima b — a confirmed planet in the habitable zone — and at least two other planets. Proxima's flaring activity makes surface conditions on Proxima b challenging, but the planet's location in the habitable zone means liquid water is possible with sufficient atmosphere. Chung Kuo's relationship to Proxima is unknown. Whether they have explored it, or claimed it, or consider it adjacent territory, they have not said.
Settled byChung Kuo — 2098 · First human exosystem colony
CPH access Denied · Exclusion zone enforced · Observation only
Open question What happened at L143-43? Chung Kuo knows. Not sharing.
Barnard's Star — 5.96 ly
M4V red dwarf · Fastest proper motion of any star · Age: ~10 billion years · Barnard b confirmed (sub-Earth) · Heading toward Sol
Surveyed · Active scientific interest · Age anomaly under study
Barnard's Star has the fastest proper motion of any star relative to Sol — it is visibly moving against the background sky at 10.3 arcseconds per year, and in approximately 8,000 years it will become the closest star to Sol as it passes through the neighborhood on its way... somewhere else. It is also among the oldest stars in the stellar neighborhood: at approximately 10 billion years old, it formed when the universe was roughly 3.8 billion years old, before the Milky Way's thick disk had fully developed, and it has been traveling through the galaxy ever since.
Its planet, Barnard b, is a sub-Earth — roughly half the mass of Venus — orbiting in a cold zone beyond the habitable region. Nothing about it suggests habitability. What interests the survey teams is the age. 10 billion years is twice Sol's age. Any planet that formed in this system at formation time has had 10 billion years of potential development. The confirmed planet is too cold and too small. But the star's age means that whatever might once have existed here has had geological epochs of potential that Sol's solar system hasn't approached yet. The Survey Corps considers Barnard's Star one of the most scientifically significant old-star observations available within the sphere, and has recommended a dedicated long-duration monitoring program that the ICC Science Budget office has approved in principle for the fourth consecutive year without providing funding.
The star is also a flare star, which adds a layer of hazard to any extended observation program. The flares are less intense than some of the more dramatic examples in the neighborhood but significant enough that a vessel in close orbit needs appropriate shielding. The survey team that mapped Barnard b named it "Pilgrim" in their unofficial designation log — a reference to the star's wandering character that the ICC nomenclature committee has not yet addressed, which the survey team considers tacit approval.
Age significance~10 billion years — twice Sol's age · Among oldest nearby stars
Planet status Barnard b confirmed — sub-Earth, cold zone · Uninhabitable · Interesting
Trajectory Approaching Sol · Nearest star in ~8,000 years · Then continuing onward
Wolf 629 — 7.85 ly
M6V red dwarf · Extremely low luminosity · Wolf 629 c confirmed orbit · Site of 2190 Clark incident
Restricted · Incident-flagged · Ongoing classified monitoring
Wolf 629 is listed in the CPH Survey Corps catalog as surveyed with restricted access pending ongoing investigation. What this means, for anyone without appropriate clearance, is: do not loiter in this system, do not attempt to retrieve debris from the incident coordinates, and report any anomalous readings to the nearest Naval vessel rather than including them in your own logs. The system itself is unremarkable — a dim red dwarf with a confirmed planet in an uninhabitable orbit, no other significant bodies, and nothing that would attract survey interest if not for what happened here in 2190.
The 2190 incident involving CPH frigate Clark is discussed in historical records. What those records do not include, and what the restricted survey file contains, is the debris field survey conducted in 2193 — three years after the Clark engagement. The debris field was partially recovered. The material analysis remains classified. The Survey Corps team that conducted the 2193 survey filed their findings under seal and three of the five team members have since transferred to assignments not associated with outer system survey work. The two remaining in outer system work have declined to discuss the 2193 mission. This is their right under the classified debriefing protocols. Naval Intelligence considers it notable that they have exercised it consistently for 160 years.
ClassificationIncident-flagged · Restricted access · Naval Intelligence active file
2193 debris surveyClassified · Results sealed · Team members non-communicative for 160 years
Sirius — 8.60 ly
Sirius A (A1V) — hot blue-white · Sirius B (white dwarf) — Sirius A's former companion · Age: ~300 million years · Brightest star in Earth's sky
Surveyed · Research station · No settlement planned
Sirius is what you see from outside: the brightest star in Earth's night sky, close enough to dominate the visible neighborhood. What it is from inside is something different. Sirius A is a blue-white star roughly twice Sol's mass and 25 times its luminosity, burning hot and fast — it will exhaust its fuel within the next billion years and follow its companion's path. Sirius B, the white dwarf, was once a more massive star than Sirius A, lived its life, exhausted its fuel, and shed its outer layers until only the compressed remnant remains — a sphere roughly Earth's size with a surface temperature still around 25,000 Kelvin, dimming slowly over billions of years. The Sirius system is, in a sense, a preview of what most stellar systems eventually become.
At 300 million years old, Sirius A is younger than the dinosaurs were old on Earth. The system has not had time to develop anything beyond basic planetary formation. The survey team found protoplanetary material, a debris disk, and conditions that the system would need another 500 million years to develop toward habitability. What the survey team also found — and what has generated a small but persistent debate in the outer system scientific community — is an anomalous density in the debris disk at approximately 4 AU from Sirius A, which does not match the expected distribution of primordial material. It is almost certainly a protoplanetary formation artifact. The team that flagged it has noted this in their report and added that the flag stands regardless.
Visiting Sirius is one of the more overwhelming observational experiences in the sphere. The star's luminosity at close range is extraordinary. Every vessel that has made the trip reports that no imaging system fully prepares you for standing in its light. Several crew logs describe the experience in terms that lean toward the religious, which the Survey Corps files under "personnel response to extreme astronomical environments" without further comment.
Sirius AA1V · 25× Sol luminosity · ~300M years old · Blindingly blue-white in person
Sirius B White dwarf · Earth-sized · 25,000K surface · What Sirius A will become
Anomaly Debris disk density anomaly at 4 AU · "Almost certainly" formation artifact · Flag stands
Luyten 726-8 / UV Ceti — 8.73 ly
BL Ceti (M5.5V) + UV Ceti (M6V) · Binary · UV Ceti: prototype flare star · 75× brightness increase in 20 seconds · Not recommended
Surveyed · Radiation hazard · Standard warning: do not approach during flare
UV Ceti is a name that appears in astronomy textbooks as the prototype for an entire class of stellar behavior, which means it does what it does more dramatically than almost any other example. A flare star of the most expressive variety: UV Ceti can increase its brightness by a factor of 75 within 20 seconds, blasting out X-ray and UV radiation at levels that would strip the atmosphere from any planet in the inner system and that would, for a vessel without appropriate shielding, end the mission in a manner that the debriefing could not be conducted in person. The flares are unpredictable in timing, which is the specific issue — you cannot wait for a quiet period with confidence.
Its companion BL Ceti is also a flare star, though less dramatically so. The two orbit each other in a period of 26 days. The system has not been found to host confirmed planets, which the Survey Corps considers fortunate given the radiation environment. The survey conducted in 2298 was completed in eleven days with no casualties, which the team lead described in her mission report as "the outcome we planned for and not the one I expected." The radiation logs from that survey are used as a training reference for outer system flare-star approach protocols.
The middle neighborhood — 10 to 15 light years
Epsilon Eridani / Ran — 10.5 ly
K2V orange dwarf · AEgir confirmed (gas giant) · Debris disk at 70 AU · Young: ~800 million years · SETI target for 400 years
Surveyed · Research station present · Active long-term study
Epsilon Eridani — called Ran in the astronomical tradition, from Norse mythology's personification of the sea — is one of the most thoroughly observed stars in the solar neighborhood and one of the most persistently interesting. Twentieth-century astronomers pointed radio telescopes at it searching for signals of intelligent life. The search produced no recognized signals, which is the answer that was expected and which has not stopped anyone from looking since.
The star is a K-type orange dwarf slightly smaller and cooler than Sol, which would make it an excellent candidate for habitable planets — except that at 800 million years old, it is younger than Earth's first complex multicellular life. Whatever is going to happen in this system, biologically, has only just started. The confirmed gas giant AEgir orbits in the outer system. The debris disk extending to 70 AU is a Kuiper Belt analog suggesting the system has the raw material for inner rocky planets — survey probes have found evidence of several, though none confirmed at habitable zone distances with confirmed atmospheres.
The debris disk is the most scientifically significant feature. Its structure implies the gap between 20 and 70 AU contains at least one additional large planet acting as a shepherd — unmapped, unconfirmed, but implied by the disk geometry. The survey team has three probe missions in this gap area and has been returning data for fifteen years that supports the shepherd hypothesis without conclusively confirming it. The lead researcher's last five-year grant renewal proposal contains the phrase "the shepherd planet is there, we just need more time to prove it," which the grant committee has found persuasive each time it has appeared.
The research station at Ran is small — about 200 permanent staff — and has the specific culture of a community that has been doing the same long-duration study for long enough that the current staff are continuing work begun by people they never met. The station's unofficial motto, painted on the common room wall by someone whose identity has been lost in the records, is: "We are not the first people to look. We are not the last. We are the ones who looked today." The ICC approved the motto as compliant with public communications guidelines. It did not comment on its philosophical dimensions.
Age significance~800 million years — younger than Earth's first complex life · Still developing
AEgir Confirmed gas giant · Outer orbit · One of the nearest confirmed exoplanets to Sol
Shepherd planet Predicted from disk geometry · Unconfirmed · 15 years of search data · "It's there"
SETI history Target since 1960 · No confirmed signals · Searches continue · No one has given up
Ross 128 — 11.0 ly
M4V red dwarf · Ross 128 b confirmed: habitable zone, temperate, Earth-mass candidate · Notably quiet star for its type
Surveyed · Active consideration for settlement · Ethical review pending
Ross 128 b is, by current scientific assessment, one of the strongest candidates for an Earth-like planet in the solar neighborhood. The planet is roughly Earth-mass, orbiting in the habitable zone of a red dwarf that is, for its stellar type, remarkably quiet — low flaring activity, stable output, the kind of star that planetary life would have the best chance of developing around. Survey probes have confirmed a significant atmosphere. Spectroscopic analysis has returned readings that are described in the Survey Corps report as "consistent with biological processing" and in the subsequent press communication as "interesting, requiring further study."
Whether Ross 128 b has life is the open question that the ICC Biology Survey team has been requesting a crewed mission to resolve since 2340. The ICC has approved the mission concept. It has not approved the budget. The debate is not primarily scientific — it is ethical and political. If Ross 128 b has life, the Chilrandi precedent and the Europan biosphere precedent and the Enceladus situation all apply simultaneously. The ICC does not want to discover a fourth alien biosphere and find itself without a framework for what to do about it. The Biology Survey team's position is that having a framework is easier if you know what you're dealing with, which requires going and looking. The ICC's position is that the framework should precede the looking. This impasse has been stable for ten years. It will not remain stable.
Ross 128 bEarth-mass · Habitable zone · Temperate · Atmosphere confirmed · Possibly inhabited
Crewed mission statusConcept approved 2340 · Budget: not approved · Impasse: ongoing
Urgency Spectroscopic "biological processing" reading from 2347 probe · Impasse intensifying
61 Cygni / New Europe — 11.4 ly
61 Cygni A (K5V) + 61 Cygni B (K7V) · Wide binary: 86 AU separation · First star with measured distance (1838) · At least one confirmed planet
Settled — New Europe (New Geneva) · CPH member
The first star to have its distance from Earth accurately measured — by Friedrich Bessel in 1838, using the parallax method — and humanity's third interstellar colony. 61 Cygni A and B are a wide binary pair of orange dwarfs, similar enough in type to be near-twins, separated by 86 AU and requiring about 700 years to complete one orbit of each other. The wide separation means both can maintain independent planetary systems, and New Europe's primary settlement orbits 61 Cygni A.
The system is fully described in the New Europe polity entry. The astronomical note worth adding here is that 61 Cygni B's planetary system remains the less-explored of the two — New Europe has concentrated its resources on 61 Cygni A, which hosts its colony, and has conducted only survey-level work on B. The survey results are unremarkable: B appears to have rocky planets, none in the confirmed habitable zone, nothing that conflicts with or complicates New Europe's territorial claim. New Europe has formally claimed both stellar systems as part of the 61 Cygni system territory. The ICC has accepted this. Chung Kuo has noted their own claim includes contiguous space, and that 61 Cygni's position relative to Chung Kuo's claimed territories should be discussed. New Europe has noted they would be happy to discuss it at the ICC. Chung Kuo has not engaged further on this specific topic.
Procyon / New Melbourne — 11.5 ly
Procyon A (F5V) + Procyon B (white dwarf) · Procyon B: dimming remnant of a once-larger star · Native quasi-sapient ant-lion species
Settled — New Melbourne/New Wellington · CPH member · Resort and ecology world
Fully described in the Major Exosystems entry. The astronomical note: Procyon B was once a star more massive than Procyon A — it lived faster, exhausted its fuel, and is now a white dwarf, gradually cooling from its current 7,700 Kelvin surface temperature. The Procyon system is thus another preview of stellar mortality: what was once the brighter companion is now a dim, shrinking remnant. The system's history of hosting a second significant star before Procyon B's transformation may be relevant to the unusual evolutionary development of Procyon's native biosphere — the ant-lion quasi-sapient species developed on a world that, for some of its evolutionary history, had a significantly different sky than it does now. The xenobiologists studying the ant-lion population have raised this in their most recent publication as a potentially significant factor in the species' cognitive development trajectory. The Evolvist community at Sol B considers this observation important. They have not elaborated on why.
Epsilon Indi — 11.8 ly
Epsilon Indi A (K4V) + Epsilon Indi Ba/Bb (brown dwarf binary) · Closest known brown dwarf binary to Sol · Indi A: solar-type, planet search ongoing
Surveyed · Evolvist research interest · Brown dwarf study ongoing
The Epsilon Indi system is two things at once: a K-type orange dwarf similar enough to Sol to be a habitable-zone candidate, and the nearest known brown dwarf binary to Sol — Epsilon Indi Ba and Bb, T-class brown dwarfs orbiting each other at roughly 1,500 AU from Indi A. The brown dwarf pair was discovered in 2003 in the original timeline and has been studied extensively ever since. They are considerably cooler than Sol B — T-class, around 1,300 Kelvin — and their combined influence on Indi A's outer system is measurable but not dramatic.
Epsilon Indi A itself has been a planet-search target for decades. No Earth-like planets have been confirmed in its habitable zone, but the search is incomplete — the star's parallax and motion made long-duration radial velocity studies difficult, and the current survey probe deployment is the most sensitive yet attempted. The system's proximity to Zion (Tau Ceti, 11.9 ly from Sol) and New Europe (61 Cygni, 11.4 ly) makes it a natural waypoint for transit between those systems. An ICC waypoint station at Epsilon Indi has been proposed several times. It has not been built. The Evolvist community has expressed research interest in the brown dwarf binary — specifically in comparing the Indi Ba/Bb pair's EM environment to Sol B's — and has submitted a research access request that is currently in ICC administrative review, which is where Evolvist access requests tend to spend considerable time.
Brown dwarf pairBa/Bb T-class · ~1,300K · Nearest brown dwarf binary to Sol · Evolvist interest
Indi A planet searchOngoing · No habitable-zone confirmation yet · Probe deployment 2344
Tau Ceti / Zion — 11.9 ly
G8.5V — closest single Sun-like star to Sol · Multiple planets · Heavy debris disk · SETI target since 1960
Settled — Zion · CPH member · Isolationist
The closest single Sun-like star to Sol, and one of the most heavily debated systems in exoplanetary science — not about whether it has planets (it demonstrably does) but about whether those planets are habitable despite the system's substantial debris disk, which implies a significantly higher impact rate than the inner solar system. Zion's surface conditions — a world with less water than Earth, extensive deserts, conditions that favor the water-extraction expertise Zion has developed — are consistent with a planet that formed in this higher-impact environment. It is a world shaped by the specific challenge of its solar system's geology. Zion's population considers this appropriate.
The SETI history of Tau Ceti is the longest of any system in the neighborhood. Frank Drake pointed the Green Bank radio telescope at it in 1960. The Breakthrough Listen initiative included it repeatedly. The CPH Survey Corps' own monitoring program has been running since 2165. The total dataset of non-detections is the most comprehensive negative result in the history of the search for extraterrestrial intelligence. The Zionist academic position on this is characteristically practical: Tau Ceti is not broadcasting because there is nothing here to broadcast. They would prefer the SETI community accept this and move on, though they understand the community's reluctance given that Zion itself is evidence that the system can support civilization.
Kapteyn's Star — 12.8 ly
sdM1 red subdwarf · Age: ~10–12 billion years · Originally from a disrupted globular cluster · Kapteyn b: habitable zone candidate · Extraordinary velocity
Surveyed · Age anomaly · Origin classification: halo interloper
Kapteyn's Star is a visitor. It is not native to the Milky Way's thin disk where Sol and most of its neighbors formed — it is a halo star, a member of what was once a globular cluster that was torn apart by the Milky Way's tidal forces, scattering its stars on high-velocity retrograde orbits through the galaxy. Kapteyn's Star is moving at roughly 245 km/s relative to Sol, an enormous velocity compared to the gentle drifting of disk stars. It is currently passing through the solar neighborhood. In astronomical terms, "currently" means within the last few hundred thousand years and the next few hundred thousand. Then it will move on.
Its age is the extraordinary fact. At 10–12 billion years old, Kapteyn's Star formed when the universe was less than 2 billion years old, before the heavy elements that make rocky planets possible were widely distributed through the galaxy. Yet it has planets — Kapteyn b, in the habitable zone, with a mass comparable to Earth's, orbiting a star that has been burning for 10 to 12 billion years. If Kapteyn b has had a stable climate for even a fraction of that time, the implications are extraordinary. The survey probe data from 2341 returned atmospheric readings that the Survey Corps report describes as "ambiguous, requiring further study" — a phrase that has acquired a specific resonance in CPH scientific communication that the general public has not fully decoded. The dedicated follow-up mission was approved immediately. It is currently in transit. Expected arrival: 2353.
The star's globular cluster origin means that it formed in a completely different chemical environment from Sol — globular clusters are metal-poor, meaning they formed before the galaxy had produced large quantities of heavy elements through stellar nucleosynthesis. Kapteyn b, if habitable, would be made of different stuff than Earth. Life there, if it exists, would have found a way using a different elemental palette. The astrobiologists who think about this describe it as the most interesting "what if" in the neighborhood. The probe team in transit is thinking about it every day of their journey.
Origin Disrupted globular cluster — not native to the disk · Passing through at 245 km/s
Age~10–12 billion years · Among oldest objects in the local neighborhood
Kapteyn b Habitable zone · Earth-mass · "Ambiguous" atmosphere · Follow-up mission in transit
If inhabited Life here would have had 10 billion years to develop · From a different elemental toolkit · In a star that will leave this neighborhood
The outer neighborhood — 15 to 20 light years
Altair — 16.7 ly
A7V · 12th brightest star in Earth's sky · Rotation period: 9 hours · Equatorial diameter 20% wider than polar · Oblate to visible observation
Surveyed · Navigation reference · Visually extraordinary
Altair spins so fast that you can see it. Not literally — you need imaging equipment. But the star's equatorial bulge, caused by its 9-hour rotation period, is large enough to be directly resolved by survey instruments: the equatorial diameter is 20% wider than the polar diameter, giving Altair an oblate shape that no star at this distance should be visible enough to measure, but is. It rotates so quickly that its equatorial regions are noticeably cooler and dimmer than its poles, producing a visible gravity-darkening effect in high-resolution images. It is, in its own way, one of the stranger things in the neighborhood — a star you can actually see is not a sphere.
At 1.7 solar masses and roughly 10 times Sol's luminosity, Altair is too hot and too young to host habitable planets at conventional distances. The survey found inner rocky planets baked to temperatures that preclude anything we would recognize as life. The outer system has gas giant material in formation. The system's scientific interest is the star itself — it is the nearest and most accessible example of a rapidly-rotating A-type star, a class that has produced significant research into stellar physics that applies to the formation and development of much younger, hotter systems throughout the galaxy.
The navigation reference designation comes from Altair's visibility: at magnitude 0.77 it is the 12th brightest star in Earth's sky, easily identifiable without instruments, and serves as a primary navigation marker for vessels in the outer sphere of human space. Altair's bearing from any known position is a reliable orientation fix. Pilots who have been working the outer sphere for years develop a specific visual affinity for it.
40 Eridani / Keid — 16.5 ly
40 Eri A (K1V) + 40 Eri B (white dwarf) + 40 Eri C (M4.5V) · Triple system · 40 Eri B: closest white dwarf to Sol · K-type primary in habitable configuration
Surveyed · Active research interest · Triple system dynamics study
The 40 Eridani system is the closest triple stellar system to Sol and one of the more complex gravitational arrangements in the neighborhood. The primary, 40 Eri A, is a K-type orange dwarf similar to Sol in luminosity and temperature — the kind of star that can host habitable planets. 40 Eri B is the nearest white dwarf to Sol: a former star that burned through its fuel and contracted to a remnant roughly Earth-sized, still hot but cooling. 40 Eri C is a dim red dwarf orbiting the B/C pair at some distance from A. The three-body dynamics are fascinating from an orbital mechanics perspective and less fascinating from a planetary habitability perspective — the gravitational interactions between the three stars over their history have perturbed the inner planetary disk around A in ways that the survey team describes as "episodically catastrophic on geological timescales."
Despite the episodic catastrophe, survey probes have found evidence of rocky planets around 40 Eri A in the habitable zone, with atmospheric signatures. The ICC nomenclature committee has noted, in a formal advisory, that 40 Eridani A has been identified in multiple science fiction works as a candidate for the star Vulcan orbits — a fictional civilization's home system. This advisory is filed for historical context. It is irrelevant to current scientific assessment. The survey team received the advisory and responded that they were aware, and that the prospect of a K-type orange dwarf in a triple system having developed advanced civilizations made excellent science fiction because K-type stars in complex gravitational environments are actually good habitable zone candidates if the orbital dynamics are right, which in this case they might be, and that finding out would require a funded crewed mission rather than a nomenclature advisory.
40 Eri AK1V · Habitable-zone rocky planets confirmed by probe · Atmosphere: ambiguous
40 Eri BNearest white dwarf to Sol · Former star · Still cooling · ~16,500K surface
Fiction note Candidate for fictional civilization's home star in pre-Contact-era fiction · Survey team unimpressed by the advisory
Gliese 667 / Breakwater Station — 23.6 ly
Triple system: K3V + K5V + M1.5V · Gliese 667C hosts multiple candidate habitable planets · Breakwater Station: CPH-Krev contact point
Frontier station · Krev contact · At sphere boundary · Elevated incident rate
Technically at 23.6 light years, Gliese 667 is beyond the nominal 20-light-year sphere, but its significance as the location of Breakwater Station — humanity's primary point of contact with the Krev Ascendancy — makes it impossible to exclude from any survey of human-adjacent space. The system is notable in its own right: a triple stellar system where the innermost component, Gliese 667C, is a red dwarf with what the pre-contact surveys identified as multiple candidate planets in the habitable zone — a remarkable density of potentially habitable bodies for a single star.
The Krev arrived at Breakwater Station approximately eight months after its establishment, having apparently been monitoring CPH skip-drive traffic in the region for some time before making contact. Their use of a peripheral gravlane node adjacent to this system for their first approach strongly suggests they have their own long-term interest in Gliese 667, possibly including a pre-existing presence in the system that predates CPH access. Whether the multiple Gliese 667C habitable-zone candidates contain anything — life, prior Krev installation, something else — is a question that the CPH Survey Corps has not been able to investigate, because any survey mission to Gliese 667 beyond Breakwater Station's immediate footprint requires Krev permission that has not been sought and would probably not be granted. The survey team has filed a formal request to raise the question in the next Breakwater diplomatic session. The Krev response to being asked whether humanity can look at their neighborhood is expected to be entertaining.
Notable absences and open questions
The survey record of the 20-light-year sphere is, by any measure, extraordinary — more explored in two centuries of skip-drive access than the previous thousand years of observation from Sol could have hoped. But the map has gaps that the Survey Corps considers significant, and several patterns in the data that are discussed in the annual survey synthesis reports in language that has become progressively less hedged over the past decade.
The most discussed gap is the absence of confirmed life outside the Sol system. The Chilrandi were found at 19.4 light years in the Eta Cassiopeia system — just within the sphere. The Xitixhui were found at Sigma Draconis, 18.8 light years. Both discoveries happened in the first century of skip-drive exploration. The subsequent century and a half has produced multiple "ambiguous" and "consistent with biological processing" readings from survey probes — Ross 128, Kapteyn's Star, 40 Eridani A — and zero confirmed detections. The Survey Corps' current position is that the ambiguous readings are not false positives. They are incomplete data from incomplete surveys. The follow-up missions will either confirm or deny. The biology teams consider "confirm" more likely than "deny" for at least two of the three.
The second discussed pattern is the distribution of the "interesting" systems relative to the Absence zone boundary that the Pluto physics laboratory has been mapping. Three of the systems with the most significant unexplained readings — Kapteyn's Star, Ross 128, and the Barnard's Star age anomaly — fall within or near the Absence zone's transition boundary as currently mapped. This is either coincidence, or it is something that Dr. Kwan Sok-Jun at the Pluto laboratory has in his private notes and has not yet decided whether to raise in official channels. The Survey Corps has not been informed of the Pluto boundary map. They have asked, and been told that the data is being analyzed. The analysis has been ongoing for four years.
"We looked at this neighborhood for hundreds of years before we could reach it. We imagined what we would find. What we actually found was stranger than most of the imagining, in ways that had nothing to do with the aliens — though the aliens are genuinely strange — and everything to do with the stars themselves. Old stars. Wandering stars. Stars that spin too fast to be spheres. Stars with white dwarf companions that were once the brighter of the pair. A K-type star 12 billion years old from a globular cluster that doesn't even belong here, passing through on its way to somewhere else, and it might have a habitable planet. We have been in this neighborhood for two centuries. We have not run out of things to be astonished by. I consider this the most encouraging fact in the Survey Corps' entire record."
— Chief Survey Officer Amara Delacroix-Osei, CPH Survey Corps, annual synthesis address, 2349
Surveyor's Guide to CPH Space — Appendix: The Outer Zone
The following entries document observations from the 20–100 light year zone outside the standard CPH survey sphere — the region that free traders, independent survey crews, and the occasional Navy long-range mission reach when they go further than the ICC considers worth funding. The CPH Survey Corps classifies this zone as "surveyed, incomplete." The crews who work it tend to classify it differently. These are the things they found that they could not explain using the models they had when they left home.
The three anomalies — what was found, and what it means
The Quiet Cluster — NGC 1502 region analogue, ~65 light years
Open cluster · 37 stars · Expected age: 4–6 billion years · Observed stellar evolution: inconsistent · Three stellar remnants where survey models predict main sequence stars
Survey anomaly · Classification pending
The cluster has 37 member stars. Of these, 34 are behaving exactly as stellar evolution models predict. Three are not. Where the models predict main sequence stars — stars that should be in the middle of their hydrogen-burning lifetime, stable, unremarkable — there are instead stellar remnants: two white dwarfs and one neutron star. The neutron star is the problem. Neutron stars form from the core collapse of massive stars — stars significantly larger than anything this cluster should have produced given its measured age and initial mass function. You cannot get a neutron star from a star that was too small to produce one. The neutron star is there anyway.
The survey team that found it spent three weeks taking measurements before filing their report. Their report's conclusion section runs four pages and ends with a sentence that the Survey Corps has quoted in several subsequent briefings: "The most parsimonious explanation for the observed remnant distribution is that three stellar objects in this cluster were caused to evolve significantly faster than their mass would naturally allow. We are not able to identify a natural mechanism for this. We are filing this observation and recommending it be treated as an open question." The Survey Corps accepted the recommendation. The open question has been open for six years. No natural mechanism has been proposed that the astrophysics community considers adequate.
The CPH Diplomatic Corps was briefed on the cluster anomaly in 2348. The Muridian representative at Threshold, when asked informally whether the Compact had any relevant data on stellar accelerations in this region, said that the archive's records for this zone were substantial, that accessing them would require a diplomatic tier advancement, and that she would be willing to note the inquiry for the record. She appeared, to the briefing officer's assessment, to be choosing her words with unusual care. The inquiry has been noted. The tier advancement is pending.
Neutron star designation Survey catalog: CPH-NS-2344-07 · Informal crew name: "the Mistake"
Natural mechanism proposed None adequate · Six years open · Astrophysics community actively puzzled
Muridian response Archive records substantial · Access requires tier advancement · Words chosen carefully
The Dead Corridor — interstellar medium, 40–70 light years, bearing 220°
Interstellar medium · Anomalous ionization · Radiation signature: X-ray and hard UV, elevated · Mapped extent: ~30 light years across · Shape: not consistent with any known natural formation process
Radiation hazard · Navigation warning issued · Shape classified
The Dead Corridor is what navigators call the region because vessels transiting it require elevated shielding and crews need to track cumulative radiation exposure carefully. The radiation itself is not at immediately lethal levels — it is elevated background, the kind that accumulates over a transit measured in weeks rather than the kind that kills in hours. What makes it a navigation hazard is its extent. Thirty light years across is a large zone to route around, and the bearing puts it between the CPH sphere and the Krev Ascendancy's nearest approach, which means any direct transit toward Breakwater Station passes through or very close to the corridor's edge.
The radiation signature is consistent with the aftermath of multiple simultaneous high-energy stellar events — the kind of X-ray and hard ultraviolet flux you'd expect from a cluster of supernovae detonating in proximity over a short time period. The problem is that there are no supernova remnants in the corridor. No neutron stars, no white dwarfs, no expanding gas shells at the locations you'd expect. Whatever produced the radiation produced it without leaving the typical physical remnants of natural stellar death. The interstellar medium itself is ionized in a pattern that the CPH's astrophysicists have described, in increasing frustration across five papers over eight years, as "inconsistent with any natural energy release mechanism we can model."
The shape is classified. The Survey Corps classified it not because it's dangerous in itself — the shape can be inferred from navigation charts already — but because the shape, once you see it described plainly, produces a specific inference that the Survey Corps has not decided how to communicate to the general public. The shape is not random. It is not the shape of an explosion expanding outward from a source. It is the shape of a boundary — something that was contained on one side and not the other. It looks, to the navigation team that first mapped it fully, like the outline of a very large engagement zone. The kind of boundary you'd see if two forces had met somewhere in that volume and the weapons they used had illuminated the space between them.
Radiation type X-ray and hard UV · Elevated background · Cumulative hazard on long transit
Natural mechanism None adequate · Five papers · Eight years · Ongoing frustration
ShapeClassified · Inference available from navigation data · The inference is the problem
Relationship to Breakwater transit Direct route passes corridor edge · Standard rerouting adds 4 transit days
IK Pegasi — 150 light years · Binary system · White dwarf + main sequence
White dwarf: 1.15 solar masses · Accreting from companion · Current trajectory: toward Chandrasekhar limit · Estimated natural detonation: 2–3 million years · Krev designation: classified
Not a survey anomaly · A prepared system · Both hierarchies aware
IK Pegasi is in the astronomical literature. Earth's astronomers identified it in the twentieth century as the closest known Type Ia supernova progenitor to the solar system — a white dwarf accreting mass from its companion star, slowly approaching the threshold at which carbon fusion ignites throughout the stellar core and the star detonates in a thermonuclear explosion visible across the galaxy. The natural timeline has this happening in approximately two to three million years. Astronomers noted it as an interesting observation. They were not wrong that it was interesting.
What the CPH's survey team found, on a close approach in 2346, was that IK Pegasi's white dwarf is accreting at a rate inconsistent with the companion star's natural mass transfer. The accretion rate has been elevated — not dramatically, but measurably and consistently above what the companion's stellar wind and tidal interaction can naturally produce. The elevation is small enough that it would be undetectable without close observation. It has been happening long enough that the white dwarf is closer to the detonation threshold than it should be by natural means. Not imminent. But closer.
The Krev were the ones who explained it. Vorrath-Seven-Scars, at a Breakwater trade session in 2348, was asked whether the Krev had any records on IK Pegasi. She paused for considerably longer than she typically pauses before answering questions. Then she said, in the specific register that the CPH diplomatic team has learned to recognize as the Krev being more careful than usual: "That system has a designation in our navigation records that I am not going to translate for you. What I will tell you is that it has that designation because both the primary hierarchies know it is there, both have the capability to accelerate the accretion rate beyond natural to the point of detonation, and neither has done so because doing so would constitute a violation of the arrangement that ended the last time the primary hierarchies engaged directly. The arrangement has held for longer than your species has existed. We assume it will continue to hold." She then returned to the subject of the cargo manifest they had been discussing and did not take further questions on IK Pegasi.
Natural detonation timeline2–3 million years · Current observed rate: accelerated · Not by natural means
Krev description"Has a designation I am not going to translate for you"
Both hierarchy capabilityConfirmed by Krev · Acceleration to detonation possible · Not done · Arrangement holds
The arrangementPredates humanity · Ended the last direct engagement · Still holding · "We assume"