NEW YORK — A newly discovered green comet tracked by telescopes has likely broken apart as it swung by the sun, dashing hopes ...

A newly discovered green comet tracked by telescopes has likely broken apart as it swung by the sun, dashing hopes of a naked ...

Earth’s oceans once looked green—and could turn purple or red due to climate and volcanic changes. Find out what it means for ...

A recently-discovered comet could have appeared in the night sky with the naked eye, but its passage near the sun has turned ...

The Northern Lights or aurora borealis may be visible in the U.S. this week due to a coronal hole and a "co-rotating ...

Want to know how your yard, local park, or school playground is helping the planet? Now you can – with just a few clicks.

(Mike Olason via AP) (Mike Olason) The newest comet was discovered by amateur astronomers, who spied it in photos taken by a camera on a spacecraft operated by NASA and the European Space Agency ...

There are a lot of things we need to do to live sustainably. However, we have to consider whether this means giving up on some of our other top priorities. Space law. It sounds like a not-so-exciting ...