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Universal Physical Constants

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Universal
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Atomic
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Electromagnetic
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Physico-Chemical
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X-Ray
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From http://physics.nist.gov/constants

Standardized values for universal physical constants are recommended and periodically updated by the Committee on Data for Science and Technology. They include electromagnetic, atomic, physical, chemical, and x-ray related constants, as well as conversion factors. They are related to certain mathematical constants, such as pi and the natural base, e.The constants listed in these tables were recommended in 2002 and renewed in 2004 by the Committee on Data for Science and Technology (CODATA). They replace the former set, published in 1998. This self-consistent set represents the current, internationally-recognized standard.

Photo Credits
Helix Nebula: Courtesty NASA/JPL-Caltech/SSC See original
Bubble Chamber: CERN photo See original
Solar Spectrum: N.A.Sharp, NOAO/NSO/Kitt Peak FTS/AURA/NSF See original
Volumetric Flask: Courtesy Dartmouth College See original
Spider Crab X-ray: Courtesy Robert Hunt See original