Mars Reconnaissance Orbiter has returned more data than all other interplanetary missions combined.
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Space smells like burned metal.
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The Sun accounts for more than 99% of the mass of our solar system.
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The Moon completes an orbit around Earth in about 27 days.
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There are rogue planets drifting through space with no star at all.
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The observable universe is about 93 billion light‑years wide.
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Rogue planets drift through space without orbiting a star.
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Neutron stars can spin hundreds of times per second.
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