A mysteriously long, thin cloud has again appeared over the 20-km-high Arsia Mons volcano on Mars. A recurrent feature, the cloud is made up of water ice, but despite appearances it is not a plume linked to volcanic activity. Instead, the curious stream forms as airflow is influenced by the volcano's 'leeward' slope − the side that does not face the wind.

This is a false color image. Nicknamed "The Rose"

Supernova remnant and pulsar wind nebula in the constellation of Taurus. This is the first entry in Charles Messier's "Catalog of Nebulae and Star Clusters."

Picture is from July 7th (I think) from Dawn

Infrared photo taken by Wide-field Infrared Survey Explorer (WISE). The result of infrared make it appear bluish-green.

Deep Dream

After a more than nine-year, three-billion-mile journey to Pluto, it’s show time for NASA’s New Horizons spacecraft, as the flyby sequence of science observations is officially underway. In the early morning hours of July 8, mission scientists received this new view of Pluto—the most detailed yet returned by the Long Range Reconnaissance Imager (LORRI) aboard New Horizons. The image was taken on July 7, when the spacecraft was just under 5 million miles (8 million kilometers) from Pluto.

If you gaze long enough into space, space will gaze back into you

Doesn't look much different than a desert on Earth.

These clouds - sometimes called night-shining clouds - are thought to be made of ice crystals that form on fine dust particles from meteors.

M2 is a globular cluster located in the constellation Aquarius.

There's many star trail pics out there, but this is the first panoramic one I've seen.

On July 11, 2015, New Horizons captured this image, which suggests some new features that are of keen interest to the Geology, Geophysics and Imaging (GGI) team now assembled at the Johns Hopkins University Applied Physics Lab in Laurel, Maryland. For the first time on Pluto, this view reveals linear features that may be cliffs, as well as a circular feature that could be an impact crater.

Globular cluster in the constellation Canes Venatici. M3 is comprised of over 500,000 stars, many of them variables.

A composite of pictures taken by New Horizons when it flew by Jupiter (and its moons) in 2007

Pics that New Horizons took back in 2007 on its way to Pluto

It doesn't look that red in this pic. Changes color every now and then.

NASA said it was giving Instagram an hour-long head start on the first image, posting it to the social media service before officially releasing it on its public website.

“Hello #Pluto! We’re at closest approach. Congrats to all! Follow our story & view new images using #PlutoFlyby.”