Physical Constants and Astronomical Data

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Home → Science → Measurements and Units → Scientific Constants

Scientific Constants

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http://www.astro.wisc.edu/~dolan/constants.html

Physical Constants and Astronomical Data
Physical Constants and Astronomical Data New! Try my Physical Calculator. It is a JavaScript calculator with all of the constants below programmed into it. Physical Constants (converted to CGS units from the NIST Constant Index) Name Symbol Number Exp CGS Units Relative Error (ppm) speed of light in a vacuum c 2.99792458 10 cm s-1 exact Planck constant h 6.6260755(40) -27 erg s 0.60 hbar 1.