The Hubble Deep Field image revealed thousands of galaxies in a patch of sky the size of a grain of sand.
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Solar flares originate from the Sun's surface.
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The Moon has no breathable atmosphere.
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The Sun makes up 99.8% of solar mass.
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Black holes can slow time so much that seconds near them equal years far away.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The Milky Way contains regions of active star formation.
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