Beautiful medusas

Jellyfish are found in every ocean, from the surface to the deep sea. The medusa stage is the adult stage in the the life cycle of jellyfish.

Halo around the sun

Solar halo seen in Indianapolis, Indiana by Jolynn Keutzer Bales. Thank you Jolynn!

View from a Pacific coast mountaintop

San Francisco photographer Meggie Raeder captures the view from Fremont Peak, near San Francisco.

Don’t miss this photo of Phobos

ESA's Mars Express spacecraft captured this photo of Phobos - the larger of Mars two moons - orbiting in front of its planet.

Earth seen from Saturn July 19, 2013

NASA has released the images of the Earth and moon taken on July 19, 2013, otherwise known as "the day Earth smiled."

Raw image Earth and moon from Saturn

On Friday, the Cassini spacecraft, Saturn and the sun were aligned so that Cassini could capture Earth's picture from distant space. Cassini got the moon, too!

First humans on the moon

Were you alive when this happened? Can you remember how exciting it was?

Earth from Saturn in 2006

The Cassini spacecraft has been orbiting Saturn since 2004. It captured this image of Earth, seen through Saturn's rings, in 2006, from nearly a billion miles away.

An aurora, and the start of meteor season

The sun is in an active part of its 11-year cycle, so auroras have been frequent. Meanwhile, summer meteor season in the Northern Hemisphere is gearing up.

A liquid lake on Saturn’s moon

A false-color mosaic of Ligeia Mare - the second-largest known body of liquid on Saturn's largest moon, Titan. It's larger than Lake Superior on Earth.