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why are the stars, planets and moons round, when comets and asteroids aren't?

  • Written by Jonti Horner, Professor (Astrophysics), University of Southern Queensland
why are the stars, planets and moons round, when comets and asteroids aren't?Shutterstock

I’m puzzled as to why the planets, stars and moons are all round (when) other large and small objects such as asteroids and meteorites are irregular shapes?

— Lionel Young, age 74, Launceston, Tasmania

This is a fantastic question Lionel, and a really good observation!

When we look out at the Solar System, we see objects of...

Read more: why are the stars, planets and moons round, when comets and asteroids aren't?

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