Italian media captures amazing images of Earth from International Space Station . How did traveling to space change your outlook on Earth ? Alessandro Nespoli used Twitter to send images back to Earth during a six - month mission which ended in 2011 . The ISS orbits 400 kilometers above Earth , at a speed of 20,000 kilometers - per - hour . May 22 marks the 42nd Earth Day with events being held all over the world .
Italian media captures amazing images of Earth from International Space Station . Alessandro Nespoli used Twitter to send images back to Earth during a six - month mission which ended in 2011 . The ISS orbits 400 kilometers above Earth , at a speed of 20,000 kilometers - per - hour . May 22 marks the 42nd Earth Day with events being held all over the world .