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Albedo definition, Astronomy. the ratio of the light reflected by a planet or satellite to that received by it. See more.
Albedo of Earth is 0.29. (The Bond albedo should be used.) You will get. $$ T ^ 4 = \frac{ 3.846Ã10^{26}(1 - 0.29)}{16 \pi \times (149,000,000,000) ^ 2 \times (5.670373 Ã 10^{â8})}=4,315,325,985 \;\mathrm{K}^4\;. $$. After powering this number to 1/4, we obtain temperature 256 K, which is -17Â° C. This looks reasonable. The real average temperature on Earth is closer to 15Â° C, but the greenhouse effect is responsible for the difference.