Question

Two planets with the same mass and atmospheric conditions orbit a single star. Planet A is closer to the star than Planet B. Which description explains the expected average surface temperatures of Planets A and B?
Group of answer choices

Planet B is expected to be cooler than Planet A.

Planet B is expected to be hotter than Planet A.

Both planets are the same temperature.

Distance has no influence on a planet's average surface temperature.

Answer 1

Answer:

Planet B is expected to be cooler than Planet A.

Explanation:

In the given case, planet A is closer to the star than planet B. Their atmospheric conditions and mass is same so their surface temperature will depend on their distance from the star. Since planet A is closer, it will receive more radiation from the star. In turn it will be hotter to re-radiate that energy back to space. Hence, average surface temperature of planet B will be lower than planet A.