Astronomy

Harvard-Smithsonian Center For Astrophysics

Harvard-Smithsonian Center For Astrophysics

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research institution, Cambridge, Massachusetts

Indus

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astronomy

Cernan, Eugene

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Biography, Space Flights, & Facts

Ecliptic

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Facts, Obliquity, & Zodiac

Roche Limit

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astronomy

Hertzsprung-Russell Diagram

Hertzsprung-Russell Diagram

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Definition & Facts

Vogel, Hermann Karl

Vogel, Hermann Karl

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German astronomer

Crater

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constellation

Griffin, Michael

Griffin, Michael

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Biography, NASA, & Facts

Space Shuttle

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Names, Facts, & History

Herschel

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space telescope

Venera

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Soviet space probes

McCandless, Bruce

McCandless, Bruce

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American naval aviator and astronaut

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