Physics

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PRL   PRF   RMP
SciDaily   NewScientist   SciAmer   Discover
PhysRev: A  B  C  D  E  ST-AB
SCIENCE   SciPhys   NATURE   NatPhys  APS   AIP   IOP   BEC Journals  
SciAstron   SciPlanet   NatMat   NatPhoton
Rev Sci Instr   Amer J Phys   Rep Prog Phys
ArXiv: Cond-Mat   Atom   Quant   Physics New J Phys   BEC Matters   EuroPhysLetters
Chaos , Q & Semi Opt / J Vac Soc A  B Appl Phys B   Appl Phys Lett   J Appl Phys
ProQuest    Science Direct
JO B   Opt Comm   OPTICS   Phys Uspekhi

Astronomy

NASAAPODs and Missions
Bad Astronomy    AstronomyNow   Universe 
MER    MRO Cassini    Spitzer    Fermi
SETI    NOAO    AURA
AAS / RAS
JP
L / MSFC / GSFC
Stellaraium   Telescopes   Binoculars
TMT / LSST / Kepler / JWST
MaunaKea / LSST

Fundamental or Defined Constants
NIST CONSTANTS / Quick Table and Constants LBNL Isotopes, Periodic Table, and References
Periodic Table    PT 2   PT 3
Chemistry Index
CRC Time I / Time II / Frequency Standards Lab

AMO Groups, Quantum Optics and Quantum Chaos

AMO's (by Element) and AMO's (by Group) Matt's Selection   MOT Links   Quant Opt Links
BEC Homepage and BEC Groups Max-Planck-Institut fur Quantenoptik
Optical Science Center (UA) Ecole Normale Superieure

Math

ALPHA Math Tables
Math Index Mathematica Graphics

Physics Organizations and Institutes

AIP and IOP APS / xxxx 
NSF Optical Society of America
American Association of Physics Teachers American Vacuum Society
Niels Bohr Institute Max Planck Society and Institutes
Enrico Fermi Institute Institute of Advanced Study

Physics, History, Education, Innovators, and Related Links

Physics 2000 @ JILA Newton's Principia
Nobel / Polar / Abel / Fields
The Physics Web and PhysLink
Web of Science and Physics Index Physics Problems and Physics Dictionary