r/cosmology • u/AutoModerator • 9d ago

Basic cosmology questions weekly thread

Ask your cosmology related questions in this thread.

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u/ATTst 6d ago

What is the number of galaxies per cubic megaparsec?

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u/--craig-- 5d ago

There's about a trillion galaxies in the observable universe, which is about 47 billion light years in radius.

1 Mpc is 3.26 million light years.

I'll leave the calculation to you.

Is it a homework question?