Astrophysics (index)

Solar Constant

(flux from the Sun at 1 AU)

The Solar Constant is the Flux (amount of Electromagnetic Radiation per unit area) from the Sun hitting something 1 AU away, e.g., hitting Earth. Ranges from 1.361 to 1.362 kilowatts (solar minimum and maximum). Since Earth is in a slightly eccentric orbit rather than always at 1 AU, the flux hitting Earth Atmosphere varies as well.

(EMR,physics,constant,flux,Sun,solar system,Earth)