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Mars MAVEN spacecraft’s first observations
MAVEN is the first spacecraft dedicated to exploring the tenuous upper atmosphere of Mars. It entered orbit around Mars on September 21, 2014.
September 24, 2014
Fires in the Amazon
Astronaut photo of rainforest being cleared for agriculture in Brazil.
September 24, 2014
Comet C/2012 K1 (PANSTARRS) on September 19
This beautiful comet may be visible with the eye alone around mid-October, but it'll remain much easier to detect using binoculars or a telescope.
September 21, 2014
Fogbow over Massachusetts
Because of the small size of water droplets in fog, a fogbow might have only very weak colors, or no color at all. Colorless fogbows are sometimes called white rainbows.
September 18, 2014
Polar mesospheric clouds over the Ukraine
Astronauts aboard the International Space Station, flying at 350 kilometers (220 miles) up, are ideally placed to observe elusive polar mesospheric clouds.
September 17, 2014
Hurricane Odile
Hurricane Odile tied Olivia (1967) as the strongest hurricane to make landfall in Baja California in the satellite era.
September 16, 2014
Mars moon Phobos in front of sun on August 8
The Curiosity rover on the floor of the Gale Crater caught this image of Mars' larger moon Phobos passing in front of the sun on August 8, 2014.
September 15, 2014
Anticrepuscular rays in a Texas sky
Next time you see crepuscular rays extending from a sunset … turn around. Look opposite the the sun. You might catch a glimpse of elusive anticrepuscular rays.
September 14, 2014
Favorite photos of September 12 aurora
Two powerful storms on the sun this week resulted in beautiful displays of the aurora borealis, or northern lights, that dipped down as far as the northern U.S.
September 13, 2014
