Planets are like popular kids in school, they have a clear spot and are easy to identify. Dwarf planets are more like the cool but smaller group that sometimes gets overlooked. Imagine Earth is the main star of the show, while Pluto is one of the supporting actors who got demoted from starring in the movie.
What Defines a Planet
A planet has to clear its path, it needs to be big enough to push other space rocks out of the way as it moves around the sun. A dwarf planet doesn’t have that power, so it just stays with others like it.
Why Pluto Is Not a Planet Anymore
Pluto used to be called a planet because scientists didn't know much about it in the beginning. But when they found out there were many more space rocks near Pluto, they realized it wasn’t big enough to clear its path, so it got reclassified as a dwarf planet.
Examples
- Earth clears its path by being big enough to push asteroids and comets out of the way.
- Ceres, which orbits between Mars and Jupiter, is also a dwarf planet, but it's bigger than Pluto.
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See also
- What Makes a ‘Planet’ Different from a ‘Dwarf Planet’?
- What are compact planetary architectures?
- How Does the Solar System Stay Together?
- How do scientists find planets orbiting distant stars?
- What are motion of moons around planets?