Space is completely silent because sound requires a medium to travel through, and space is a near-perfect vacuum.
Fact #4089
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Some galaxies contain supermassive black holes millions of times the Sun’s mass.
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The Rosetta mission successfully landed a probe on a comet in 2014.
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The Milky Way is just one of billions of galaxies in the universe.
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The observable universe is about 93 billion light‑years wide.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The Earth's magnetic field helps prevent atmospheric loss.
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The light you see from some stars today began traveling before humans existed.
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Black holes can slow time so much that seconds near them equal years far away.
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