The view shows a portion of the top of the south wall of the canyon, looking down onto steep upper slopes. The colors indicate diverse rock types are present, according to the HiRISE team. (See another HiRISE picture of Mars.)
Auroras From Above
Looking like wispy clouds, aurora borealis, or northern lights, light up the sky above Canada's Quebec and Ontario Provinces on October 8.
NASA satellites captured the view a few days after a coronal mass ejection (CME), a release of energetic particles from the atmosphere of the sun. CMEs stir up the magnetic field around Earth, producing the "gorgeous displays" of northern lights, according to NASA's Earth Observatory. (See "New Aurora Pictures: Solar Flare Sparks 'Snakes,' 'Spears.'")
What a Scoop
A scoop on NASA's Marsrover Curiosity shows soil particles too big to pass through a sample-processing sieve, through which only grains less than 0.006 inch (0.015 centimeter) wide can pass.
Don't worry, this scorpion doesn't sting. A two-panel mosaic reveals a region of the zodiacal constellation Scorpius. Taken from central Australia, the picture was submitted to National Geographic's My Shot photo community on October 8.
Scorpius, which rises during the summer months in the Northern Hemisphere, follows the ecliptic—or the path of Earth's orbit around the sun.
A long plume of ash stretches from Russia's Shiveluch volcano following an eruption October 6, as captured by NASA's Aqua satellite.
The Kamchatka Volcanic Emergency Response Team in Alaska reported that the ash plume from Shiveluch—located near the coast of the Bering Sea—had reached an altitude of 9,800 feet (2,990 meters) above sea level, and had traveled some 140 miles (220 kilometers) from the volcano's summit.
Auroras tower over Lumby, British Columbia, in a picture submitted to the astronomy-education project The World At Night (TWAN) on October 9.
Auroras are created when charged solar particles slam into Earth's magnetic field and get funneled poleward. The particles collide with molecules in our atmosphere, transferring energy and making the air molecules glow.