The SpaceX Dragon cargo spacecraft, carrying valuable science research, will depart from the International Space Station (ISS) and return to Earth. Watch it live.
Earlier this year, scientists presented evidence for a Planet Nine in the far outer solar system. Scientists think it exists, but - if so - how did it get there?
These scientists said that, as our warming climate saps the ocean of oxygen, marine life like fish, crabs, squid, and sea stars could be left struggling to breathe.
On May 2, 2016, Walter E. Elliot took this shot of clouds rolling over the channel that connects Michigan's White Lake to Lake Michigan. Doesn't it look like an oil painting?
Saturn's rings appear to be intersecting in an impossible way. But - in this new Cassini spacecraft image - we're really just seeing a play of light and shadow.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.