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gptkb:Sidereus_Nuncius
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Milky Way as composed of stars
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gptkb:Siderius_Nuncius
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mountains on the Moon
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gptkb:Sidereus_Nuncius
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moons of Jupiter
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gptkb:Sidereus_Nuncius
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mountains on the Moon
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gptkb:The_Sidereal_Messenger
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moons of Jupiter
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gptkb:Observation_of_Gravitational_Waves_from_a_Binary_Black_Hole_Merger_(2016)
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first direct detection of gravitational waves
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gptkb:Siderius_Nuncius
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Milky Way as composed of stars
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gptkb:The_Sidereal_Messenger
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gptkb:surface_of_the_Moon
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gptkb:Siderius_Nuncius
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moons of Jupiter
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gptkb:The_Artificial_Disintegration_of_the_Nucleus
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first artificial nuclear reaction
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gptkb:The_Sidereal_Messenger
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Milky Way structure
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