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first exposition of rocket based on newton third law of motion
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term whirlpool nebulae
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October 4 1957 was the first world satellite
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NASA first probe
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first women who was on the moon
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U.S. launches first American astronaut, Alan Shepard Jr., into space, on a 15-minute, 22-second suborbital flight.
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President Kennedy declares the American space objective to put a man on the moon and return him safely by the end of the decade.
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it was a big thing that they got a clear view of the earth rise
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first robot
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Earth Day – April 22., millions of people gather in the United States for the first Earth Day organized by Gaylord Nelson, former senator of Wisconsin, and Denis Hayes, Harvard graduate student. US Environmental Protection Agency established
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first space station ever on the moon
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1989 — Montreal Protocol on substances that deplete the ozone layer entered into force
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became the first private manned space vehicle to fly past the boundary of space.