Astronauts and robotic spacecraft have been capturing profound photos of Earth for decades. Earth Day is an annual celebration on April 22 focused on environmentalism and conservation. Iconic images ...

Using nearly a decade of satellite observations, NASA's Black Marble project reveals a constantly shifting portrait of human ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The Earthrise photo taken ...

Defined by a spirit for exploration, astronauts famously pursue their profession out of a dogged desire to leave their home world behind and venture out into the stars. But when they surpass the ...