A window into Europa’s ocean

Astronomers have found a new way to gather data about the vast liquid ocean below the surface of Jupiter's icy moon Europa.

Ruins of Perperikon, ancient city of the Thracians

Human activity at Perperikon, sometimes referred to as the European Machu Picchu, dates back to 5,000 B.C.

Twilight over the West Philippine Sea

Twilight over the West Philippine Sea by EarthSky Facebook friend Jv Noriega.

Snowflakes on wood

One of the few upsides to the recent snow storms has been the beautiful snowflake images we have received through e-mail and Facebook.

The rain slowed. The fog rolled in.

A beautifully composed photo from a friend in south Georgia.

February full moon aka the Snow Moon

The February 25, 2013 full moon over the Bothnian Sea between Finland and Sweden.

Last night’s moonrise over Tehachapi

The full moon is February 25, 2013 as seen from much of the world. But the moon looks full for a day or so on either side of full.

Self-portrait of Curiosity rover on Mars

Self-portrait of the Mars Curiosity rover on a flat, rocky perch in the Yellowknife Bay region of Mars' Gale Crater.

The island of Tristan da Cunha

This photo, taken by an astronaut aboard the International Space Station, shows the volcanic island Tirstan da Cunha in the southern Atlantic Ocean.

Arctic sea ice near its maximum for 2013

Arctic sea ice near its maximum for this year, in Canada’s Gulf of St. Lawrence.

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