The Kepler Space Telescope discovered over 2,600 exoplanets during its nine-year mission.
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Neutron stars can spin hundreds of times per second.
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The Sun accounts for more than 99% of the mass of our solar system.
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Quasars are extremely bright objects powered by supermassive black holes.
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There are black holes at galaxy centers.
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The Moon's gravity affects ocean tides.
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Some metals such as mercury are liquid at room temperature.
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Time moves slower in stronger gravitational fields.
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