Landsat: 42 Years of Earth from Space Photos | Video

Wednesday, July 23, 2014 - 11:30 in Astronomy & Space

NASA's first Landsat mission launched in July 1972. Seven more satellites have been launched since. Two of these, Landsat 7 & 8, are still active. The program acquired science imagery of natural disasters, urban change, water, ice, and farming.

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