Have you ever wondered why we celebrate Earth Day? We've got information on why we dedicate a day to our planet, when Earth ...

The Earth and a starry night appear to merge into one strange and otherworldly sci-fi trip in this mind-bending photo ...

Learn about Earth Day founder Gaylord Nelson (1916–2005) and how environmental disasters of his day inspired the creation of Earth Day in 1970. On December 7, 1972, Apollo 17 astronauts captured a now ...

SEE ALSO: NASA will show the world new 'blue marble' photos of Earth every day The photo was taken from about 105 kilometers (65 miles) above Earth by a rocket launched from the White Sands ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Seven planets, along with the sun and the moon, align across the sky above Earth's Mendip ...