When a large gas cloud starts to collapse in a free-fall due to gravity, it will start to cool down as it contracts because of the atoms fall inward.

Name: When a large gas cloud starts to collapse in a free-fall due to gravity, it will start to cool down as it contracts because of the atoms fall inward.
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As a large gas cloud collapses, it heats up because the gravitational potential energy is converted into thermal energy, causing the temperature to rise as it contracts.

When a Large Gas Cloud Starts to Collapse in a Free-Fall