Today in History
July 23, 1972
Eyes in the Skies
The U.S. sends into orbit the first satellite to monitor the Earth's landmasses and resources. Landsat 1, originally called Earth Resources Technology Satellite 1, weighs 1,965 pounds and contains cameras that record the same points on Earth every 18 days. It radios data and pictures back on demand. Before it is retired in January, 1978, Landsat 1 sends back more than 300,000 pictures. Today, Landsat 7, launched in 1999, continues the Earth-observing mission, sending back images that aid in recovery efforts in Burma, following the May 2 cyclone.
Today's Feature History Article
In 1958, Explorer 1 launched America's response to the USSR's Sputnik
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