The COBE satellite in 1992 detected temperature variations in the cosmic background radiation, confirming Big Bang models.
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The observable universe is about 93 billion light‑years wide.
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The Fermi Paradox questions why extraterrestrial life has not been observed.
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The observable universe is about 93 billion light‑years wide.
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The Voyager 1 spacecraft is the farthest human-made object from Earth and still communicates with us.
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Some galaxies appear distorted due to gravitational effects.
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The Milky Way galaxy contains billions of stars.
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Light from distant galaxies shows us the past.
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The Moon was formed billions of years ago.
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