October 22, 2021

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Galaxies, the cosmic cities of the universe, explained by astrophysicist

4 min read


Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of Ask a Spaceman and Space Radio, and author of How to Die in Space.

Galaxies are glittering cities, massive metropolises full of stars, dust, gas, black holes, magnetic fields, cosmic rays, dark matter and more. Separated by millions of light-years of essentially nothing, galaxies are incredibly isolated, each one an island. 



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