Stellar and Extragalactic Radiation at the Earth's Surface

Details Stellar and Extragalactic Radiation at the Earth's Surface Stellar and Extragalactic Radiation at the Earth's Surface

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006japa...27....1p&link_type=abstract

Journal of Astrophysics and Astronomy, Vol. 27, Issue 1, p.1

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

Reviving a calculation made by Eddington in the 1920s, and using the most recent and comprehensive databases available on stars and galaxies, including more than 2,500,000 stars and around 20,000 galaxies we have computed their total radiation received at the Earth just outside its atmosphere. This radiation density, if thermalized, would be equivalent to a temperature of 4.212 K. The comparability of this temperature to that of the cosmic microwave background (2.723 K) may either be a pure coincidence or may hold a key to some as yet unknown, aspect of the universe.

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