A Chameleon Sky

The sands of time are running out for the central star of this the Hourglass Nebula.…

Orbital Sunrise

The Expedition 24 crew on the International Space Station photographed this image of polar mesospheric clouds…

The Red Hills

Backdropped by red hills, the Development Motor-2, or DM-2, ignites during an Aug. 31, 2010, static…

Three Storms

The current Geostationary Operational Environmental Satellite GOES-13 captured this image of Hurricane Danielle heading for the…

Galaxy at the Edge

Spiral galaxy NGC 4921 presently is estimated to be 320 million light years distant. This image,…

A Strange Ring Galaxy

Is this one galaxy or two? Astronomer Art Hoag first asked this question when he chanced…

Islands of Four Mountains

The picturesque, but snow-capped volcanoes, composing the Islands of the Four Mountains in Alaska's Aleutian Island…

Hydrogen Sulfide and Dust Plumes on Namibia’s Coast

Cloudless skies allowed a clear view of dust and hydrogen sulfide plumes along the coast of…

Anaxagoras Crater

This image from the Lunar Reconnaissance Orbiter shows the floor of the moon's Anaxagoras crater, including…

Bright Lights

Two extremely bright stars illuminate a greenish mist in this image from the Spitzer Space Telescope's…