The Opportunity rover on Mars was designed for a 90-day mission but operated for over 14 years.
Fact #11338
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Some galaxies are trillions of miles wide.
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Light from distant galaxies shows us the past.
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The Sun accounts for more than 99% of the mass of our solar system.
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Black holes can slow time so much that seconds near them equal years far away.
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The observable universe is about 93 billion light‑years wide.
Fact #1865 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1906 · Space
The observable universe is about 93 billion light‑years wide.
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Exoplanets have been discovered in habitable zones around distant stars.
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