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Quasar 3c273
Calculated from spectral hydrogen line, the host of this target is receding at nearly 16% of the speed of light. This quasar is the brightest one currently visible from Earth, and the first one to be discovered.
Extragalactic
Supernovae
Relativistic Jet
52 Europa
79 Eurynome
Stages of Supernova Remnant
The Crab Nebula, approximately 1000 years since nova in 1054 AD, top left. The Jellyfish Nebula, aged up to possibly 30000 years old, top right. Cygnus Loop, about 10000 years since creation by central nova, bottom.
M3
M15
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