events
The United States launches Landsat 1, the first Earth-resources satellite.
Related Wikipedia articles
Landsat 1
First satellite of the United States' Landsat program, active 1972–78
Landsat 1 (LS-1), formerly named Earth Resources Technology Satellite ERTS-A or ERTS-1, was the first satellite of the United States' Landsat program. It was a modified version of the Nimbus 4 meteorological satellite and was launched on July 23, 1972, by a Delta 0900 rocket…Source: Wikipedia (CC BY-SA)
Satellite
Objects intentionally placed into orbit
A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation (GPS), broadcasting, scientific research, and Earth observation.…Source: Wikipedia (CC BY-SA)