Space Exploration

 US #3187d from the Celebrate the Century: 1950s sheet.
January 31, 1958

Launch of Explorer I 

Late in the evening of January 31, 1958, the US launched its first satellite, Explorer I.

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1991 29¢ Space Exploration: Venus
December 14, 1962

Mariner 2 Flies By Venus

On December 14, 1962, Mariner 2 became the first spacecraft to fly by Venus. Mariner 2 sent back a wealth of data about the planet, revealing many facts unknown up to that point.

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1999 33¢ Celebrate the Century - 1960s: Man Walks on Moon
July 20, 1969

U.S. Lands First Men On The Moon

On July 20, 1969, the US effectively won the Space Race when Neil Armstrong and Buzz Aldrin landed the Eagle lunar module on the Moon’s surface.

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 US #2573 from the 1991 Space Exploration Issue.
April 5, 1973

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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2012 John Glenn - Orbit Aboard Friendship 7 50th Anniversary, Mint Souvenir Sheet, Turks and Caicos
February 20, 1962

First American Orbit of Earth 

On February 20, 1962, John Glenn became the first American to orbit the Earth aboard his Friendship 7 capsule.

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 US #1193 pictures Friendship 7, which carried John Glenn on the first successful American orbit of the Earth.  Click image to order. 
January 31, 1961

Mercury-Redstone 2

On January 31, 1961, Mercury-Redstone 2 launched Ham the Chimp into space.

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 US #966 was issued at the observatory in 1948.  Click image to order. 
January 26, 1949

First Light of the Hale Telescope 

On January 26, 1949, the Hale Telescope at Palomar Observatory first saw light. Still in use today, the Hale telescope is one of the world’s largest optical telescopes.

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 US #3190a from the Celebrate the Century – 1980s sheet.  Click the image to buy.
January 5, 1972

Birth of the Space Shuttle Program 

On January 5, 1972, President Richard Nixon signed legislation authorizing the creation of America’s first space shuttle, the “world’s first reusable spacecraft.”

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 US #1371 pictures the famed Earthrise photo captured on this mission.  Click picture to buy.
December 21, 1968

Launch of Apollo 8 

On December 21, 1968, Apollo 8 launched from Kennedy Space Center.

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