Soalr heating and albedo from ASTR....

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Front (Question)

Soalr heating and albedo

Back (Answer)

Fraction "A" of this power is reflected (A is called the albedo of the planet).
The remaining fraction, (1-A), is absorbed and re-radiated from the surface of the planet.

Power = 4piR².σT⁴ = L/4piD² x piR² (1-A)

T α 1/D^1/2
Thus the size "R" of the planet cancels and we are left with:
So planets closer to the Sun are hotter.

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