Galaxies & the Universe (Vocabulary)

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4 Terms

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Galaxy

Huge collections of stars, gas, and space dust held together by gravity.

<p>Huge collections of stars, gas, and space dust held together by gravity.</p>
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Dark Matter

Matter that emits or send out no light at any wavelengths.

<p>Matter that emits or send out no light at any wavelengths.</p>
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Big Bang Theory

The theory that the universe began from one point billions of years ago and has been expanding ever since.

<p>The theory that the universe began from one point billions of years ago and has been expanding ever since.</p>
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