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it was the first to orbit the earth
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Alan B. Shepard became the first U.S citizen in space.
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became the first human in space. he orbit the earth and returned. then after that president John F. Kennedy called for the U.S to send humans to the moon for research
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in project mercury John Glenn was the first U.S citizen to orbit the earth.
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Explored Venus's atmosphere
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apollo 11 landed on the moons surface, and Neil Armstrong was the first to step foot on the moon.
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sent back photos of Jupiter--- first probe to encounter an outer planet
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orbiter mapped the surface of mars; lander searched for life on mars
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mapped Venus's surface and returned data on the composition of Venus's atmosphere
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a small probe that began a five month approch on Jupiter and took a parachute ride through Jupiters violet atmoshpere in December. studied the stars, moons, rings, and magnetic fields.