What Causes a Planet to Be ‘Alive’ or ‘Dead’?

Imagine a planet like Earth, where it's just right, not too hot, not too cold. That’s what makes it 'alive'. But if a planet is too close to its star, it gets too hot, and all the water disappears. If it's too far away, it freezes over. That makes it ‘dead’.

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Examples

A planet too close to its star is like a pizza that's been in the oven too long, everything burns up.
A planet too far from its star is like a frozen soda can, nothing moves or changes.
Earth is just right, like a perfectly cooked steak, not too hot, not too cold.

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Categories: Space · planets,life,space science,astronomy