What Is a Star?
image via New Scientist
April 11, 2025, 10:45 AM
- •Stars are massive, hot and roughly spherical.
- •They're held together by their own gravity, and they consist of plasma (gas heated so much that electrons are stripped from its constituent atoms).
- •They shine, which is probably their most basic characteristic.
Stars are massive, hot and roughly spherical objects that are held together by their own gravity and consist of plasma. They are luminous and shine because of nuclear fusion reactions in their cores.
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Phil Plait
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