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The universe contains billions of galaxies. The largest galaxies contain a trillion stars. What holds each galaxy together?
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Sep 6, 2018
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The universe contains billions of galaxies. The largest galaxies contain a trillion stars. What holds each galaxy together?
Physics
middle-school
Shaba
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Although scientists are not certain, it's theorized that the center of each galaxy contains a supermassive black hole. This black hole has the gravity to pull together billions of stars in an orbit.
GutenYe
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Sep 8, 2018
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Its Gravity. Gravity holds them together
Beyamor
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Sep 10, 2018
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