The International Space Station is the most expensive object ever constructed and can be seen with the naked eye from Earth.
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Venus is sometimes called Earth's sister planet.
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Neptune has some of the fastest winds in the solar system.
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The Kuiper Belt contains many icy bodies beyond Neptune.
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The observable universe is about 93 billion light‑years wide.
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The Earth is not perfectly round.
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Dark energy is thought to drive the accelerating expansion of the universe.
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Some pulsars emit beams of radiation like cosmic lighthouses.
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Mercury has no substantial atmosphere to trap heat.
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