The Oort Cloud, a theoretical shell of icy objects surrounding the solar system, may extend up to 2 light-years from the Sun.
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Solar eclipses occur when the Moon blocks the Sun from Earth's view.
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The observable universe is about 93 billion light‑years wide.
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The Milky Way is estimated to be over 100,000 light-years wide.
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The telescope expanded understanding of the universe.
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The light you see from some stars today began traveling before humans existed.
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Quasars are extremely bright objects powered by supermassive black holes.
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The largest volcano is on Mars.
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There are stars older than the Milky Way.
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