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Noctilucent clouds and rising moon
These clouds - sometimes called night-shining clouds - are thought to be made of ice crystals that form on fine dust particles from meteors.
July 10, 2015
Best photos: Venus and Jupiter after sunset
People around the world are capturing the very bright planets Venus and Jupiter as they draw closer in the west after sunset this month.
July 8, 2015
Milky Way over Maine lighthouse
The Milky Way over the Atlantic at the Pemaquid Point lighthouse in Bristol, Maine.
July 7, 2015
Galactic fireworks
Here's a composite image of Messier 106, known for its strange spiral arms, located 23 million light years away.
July 4, 2015
Mercury and more before dawn
Ken Christison caught Mercury in the east before dawn this week. He couldn't see it with the eye that day, but you might see it, if you look. Here's how.
July 2, 2015
Big Dipper before dawn
In the month of June, the Big Dipper is low in the sky before dawn.
June 25, 2015
Edgewise view into our Milky Way
Our sun orbits the center of the Milky Way galaxy, which is 100 thousand light-years wide and contains 100 billion stars. Looking into the Milky Way ...
June 24, 2015
Geomagnetic storm strikes. Awesome auroras!
Storms on the sun sent giant plasma clouds across space, which interacted with Earth's magnetic field. See photos of this week's fabulous displays of auroras.
June 24, 2015
