Triple lightning hits the sea

Roberto Porto captured this image on September 15. He's on the island of Tenerife, one of Spain's Canary Islands, off West Africa.

See it! Dance of planets before dawn

Mars emerged before dawn last week, to meet Mercury below bright Venus. And then the moon passed through. Thanks to all who submitted photos!

Lake Louise

"The smoke from a wildfire created a great mood."

Outer space

"I'm a daydreamer and a nightthinker," wrote photographer Manuel Dietrich.

Last night’s moon over Freedom Tower

Photo taken from Exchange Place, Jersey City, New Jersey.

Most detailed color images of Saturn’s rings, ever

As we prepare to say goodbye to Cassini at Saturn - one of the longest-running and most awesome space missions ever - here's yet another first, a finely seen section of Saturn's inner-central B Ring, in natural color.

Thursday night was fantastic for auroras

Space weather forecasters predicted the possibility of strong geomagnetic storms, resulting in a strong display of the aurora borealis, or northern lights … and they were right!

Asteroid 3122 Florence: Video and images

This large asteroid swept closest to Earth on September 1. It's big enough that astronomers are still catching it in small telescopes, as a small, slow-moving “star.”

Giant sunspots, solar flares, aurora alert!

Sunwatchers are still tracking those 2 large sunspot groups making their way across the Earth-facing side of the sun. Then yesterday there was an X-flare! Watch for possible auroras.

Saturn riding the Dark Horse

In this project nightflight image, the Dark Horse Nebula has a rider. Turn sideways to see Saturn riding on the horse's neck.