The WISE telescope discovered 33,000 previously unknown asteroids and 19 comets.
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Comets can develop long tails when near the Sun.
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The Earth's magnetic poles slowly shift over time.
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The observable universe is about 93 billion light‑years wide.
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The Sun makes up 99.8% of solar mass.
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The Moon's gravity affects ocean tides.
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There are rogue planets drifting through space with no star at all.
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The International Space Station orbits Earth roughly every 90 minutes.
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