What Makes a Planet 'Habitable' or 'Dead'?

Imagine a planet is like a house. For life to live there, the house needs the right temperature and enough light. If it's too hot or too cold, or if there's no sunlight, the house can't support life, just like how you can't grow plants in a dark room.

The Goldilocks Zone

Planets that are just right for life are called Goldilocks planets because they’re not too close to their star and not too far away. Earth is one of them!

What Makes a Planet 'Dead'

If a planet is too close to its star, it gets super hot, like Mercury! If it's too far away, it becomes super cold, like Neptune. In both cases, life can’t survive.

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Examples

  1. A planet too close to a star becomes like a boiling pot, and all the water evaporates, no life can survive there.
  2. A planet that's too far away from its star becomes like a freezer; everything freezes solid, no liquid water to support life.
  3. Earth is in the perfect spot, just like Goldilocks: not too hot, not too cold, we have oceans and life everywhere.

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Categories: Space · Habitability,Exoplanets,Planetary Science