By the time you get to the North or South poles, your spin is very slow indeed — it takes an entire day to spin in place. Space agencies love to take advantage of Earth's spin. If they're ...

After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.

On Valentine's Day 1990, NASA's Voyager 1 spacecraft snapped what would become one of the most iconic images ever taken: a view of Earth from 3.7 billion miles (6 billion kilometers) away.

After nine-month long space stay, astronauts Sunita Williams and Barry Wilmore are all set to return aboard the SpaceX Crew ...