The Sun accounts for 99.86% of all the mass in our solar system.
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Space is completely silent.
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The Bell Labs experiment led to the discovery of the cosmic microwave background.
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The Milky Way is just one of billions of galaxies in the universe.
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The Moon's gravity influences ocean tides.
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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 observable universe is about 93 billion light‑years wide.
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The Earth's orbit around the Sun is slightly elliptical.
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