Astronomy

Celestial Sphere

Celestial Sphere

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astronomy

Shepard, Alan B., Jr.

Shepard, Alan B., Jr.

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American astronaut

Bella, Ivan

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Slovak pilot and air force officer

Sunlight

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Wavelengths, & Facts

Mars

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Facts, Surface, Moons, Temperature, & Atmosphere

Gagarin, Yuri

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Biography & Facts

Encke’s Comet

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astronomy

Sunspot

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astronomy

Borman, Frank

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Biography, Spaceflights, & Facts

Chronology Of Notable Astronauts

Chronology Of Notable Astronauts

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Kondakova, Yelena

Kondakova, Yelena

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Russian cosmonaut

Short, James

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British optician and astronomer

Cassini, Jacques

Cassini, Jacques

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French astronomer

SpaceShipOne

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Records, Flights, & Facts

Lunar Atmosphere and Dust Environment Explorer

Lunar Atmosphere and Dust Environment Explorer

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United States spacecraft

Cassiopeia A

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astronomy

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