What is the primary source of heat in the central cores of the giant planets?

Each giant planet has a core of “ice” and “rock” of about 10 Earth masses. Jupiter, Saturn, and Neptune have major internal heat sources, obtaining as much (or more) energy from their interiors as by radiation from the Sun.

Explanation:

ExplEach giant planet has a core of “ice” and “rock” of about 10 Earth masses. Jupiter, Saturn, and Neptune have major internal heat sources, obtaining as much (or more) energy from their interiors as by radiation from the Sun.

What are the main atmospheric heat sources of each of the giant planets? For Jupiter, Saturn, and Neptune, both sunlight and internal sources provide energy to the atmosphere.

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