Sun grazer comets – icy dirt balls or rocky?

sun grazing comet mystery puzzle grazer surive rock not ice

Comets were dirty snowballs and are now icy dirt balls but do sun grazer comets – comets that go very close to the sun – show that comets are rocky and have little or no ice? How do sun grazing comets survive when so close to the Sun, which is considered hot? More and more …

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