Central starry pathway is the Milky Way, our home galaxy. The Andromeda galaxy is an elongated fuzzy patch, just right of center.

Ken Scott was hiking at the Sleeping Bear Dunes National Lakeshore, in Michigan, when he came upon these bent trees.

Satellite image showing shadow over Africa about 38 minutes after the maximum eclipse on November 3, 2013.

Two knee surgeons at University Hospitals Leuven have discovered a previously undescribed ligament in the human knee. The ligament appears to play an important role in patients with anterior cruciate ligament (ACL) tears.

Comet ISON interactive model visualizes comet's current position, trajectory, and important moments as Comet ISON hurtles toward its encounter with the sun.

"What this means is, when you look up at the thousands of stars in the night sky, the nearest sun-like star with an Earth-size planet in its habitable zone is probably only 12 light years away and can be seen with the naked eye." - Erik Petigura

"Four comets in one night - an opportunity too rare to be missed." - Zlatan Merakov

The increased sea temperature expected in 2100 will in itself mean that the potential number of species introduced by ships will increase more than sixfold in the Norwegian Archipelago Svalbard in the Arctic Ocean.

Find out what deep space sounds like in a new video from NASA.

Beautiful photos of Sunday's eclipse - November 3, 2013 - taken from an eclipse-chasing airplane at 43,000 feet over the Atlantic.