NASA's Earth Minute: Mission to Earth?

NASA doesn't just explore outer space! Since 1959, with the launch of the first weather satellite, NASA has been studying our home planet on a global scale. NASA monitors Earth's vital signs via satellites and airplanes, sends scientists to the far corners of the land and under the ocean, and develops computer models of Earth's climate processes. Why? Because Earth is the only planet that nearly eight billion people call "home sweet home.