Editing Solar constant (section)

===The Sun's total radiation===
The [[angular diameter]] of the Earth as seen from the Sun is approximately 1/11,700 [[radian]]s (about 18 [[minute and second of arc|arcseconds]]), meaning the [[solid angle]] of the Earth as seen from the Sun is approximately 1/175,000,000 of a [[steradian]]. Thus the Sun emits about 2.2 billion times the amount of radiation that is caught by Earth, in other words about 3.846×10<sup>26</sup> watts.