High Definition Views of Earth

A special high definition feed from NASA Television on Earth Day, April 22, which features views of Earth captured by cameras aboard the International Space Station. The space station and its crew orbit Earth once every 90 minutes from an altitude of approximately 220 miles. It can be seen from Earth with the naked eye. The orbiting outpost travels at a speed of approximately 17,500 miles per hour, and the crew experiences 16 sunrises and sunsets each day. The station has been continuously occup