What Makes a Planet 'Gaseous' or 'Solid'?

Imagine a planet as a giant ball made of different ingredients. If it has lots of light, fluffy stuff like clouds and smoke, it's called 'gaseous.' If it’s more like a solid rock or dirt ball, it's called 'solid.' The reason depends on how far the planet is from its star, and what kind of ingredients it started with.

Why Distance Matters

Planets closer to their stars get hotter. That heat keeps things in gas form. Planets farther away are cooler, so rocks and dirt can stay solid.

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Examples

  1. A gaseous planet is like a giant marshmallow, it’s soft, fluffy, and full of air.
  2. A solid planet feels more like a brick, hard and heavy.
  3. If you were on a gaseous planet, you might float because there's so much light stuff around.

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Categories: Space · planets· solar system· astronomy · Text is available under the Creative Commons Attribution-ShareAlike License.