1939 New York World’s Fair
On April 30, 1939, the New York World’s Fair opened at Flushing Meadows-Corona Park in Queens, New York.
Technology
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The Space Shuttle Challenger Disaster
On January 28, 1986, the space shuttle Challenger broke apart during the launch of its 10th mission.
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The Moscow-Washington Hotline
On August 30, 1963, the first message was sent on the Moscow-Washington hotline.
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First International Polar Year
On August 1, 1882, the first International Polar Year (IPY) began.
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Launch of Pioneer 11
On April 5, 1973 (some sources cite April 6 UTC (Coordinated Universal Time), the Pioneer 11 space probe launched from Cape Canaveral, Florida.
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Launch of Sputnik I
On October 4, 1957, the Soviet Union launched Sputnik I, the first man-made object in space, which sparked the start of the Space Race with the United States.
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First Man in Space
On April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to travel into space.
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Final Mission to the Moon
On December 11, 1972, Apollo 17 became the last manned NASA mission to the Moon.
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First U.S. Hologram Postal Stationary
On December 3, 1989, the USPS issued its first postal item to be produced with a hologram – a 25¢ stamped envelope picturing a space shuttle docking at a space station.
