🪨Asteroid vs Comet☄️
Asteroids and comets are leftovers from the solar system's birth, but they differ in what they are made of and where they come from.
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🪨Asteroid
- ✓Made mostly of rock and metal
- ✓Mostly orbit in the asteroid belt between Mars and Jupiter
- ✓Formed in the warmer inner solar system
- ✓Stay solid and do not grow a tail
- ✓Range from tiny boulders to hundreds of kilometers wide
☄️Comet
- ✓Made of ice, dust and frozen gases
- ✓Originate in the distant Kuiper Belt and Oort Cloud
- ✓Formed in the cold outer solar system
- ✓Grow a glowing coma and tail when near the Sun
- ✓Follow long, highly elliptical orbits
Verdict
Asteroids are rocky and stay close to home; comets are icy 'dirty snowballs' from the outer system that put on a show when sunlight vaporizes their ice into a tail.
Frequently asked
Why do comets have tails but asteroids do not?+
Comets contain ice that vaporizes near the Sun, releasing gas and dust that form a glowing tail.
Where do comets come from?+
From the Kuiper Belt beyond Neptune and the far more distant Oort Cloud.
Could an asteroid hit Earth?+
Yes, and several have. Astronomers track near-Earth asteroids to assess any impact risk.
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