Why Super Typhoon Haiyan was so powerful

Low wind shear and warm ocean temperatures exist in the Pacific now. That's why Haiyan grew into one of the strongest - perhaps the strongest - storm ever recorded.

Bent trees on the shores of Lake Michigan

Ken Scott was hiking at the Sleeping Bear Dunes National Lakeshore, in Michigan, when he came upon these bent trees.

Four comets in one night

"Four comets in one night - an opportunity too rare to be missed." - Zlatan Merakov

Eclipse day Sunday, November 3

Beautiful photos of Sunday's eclipse - November 3, 2013 - taken from an eclipse-chasing airplane at 43,000 feet over the Atlantic.

Great Smokey Mountains

Great Smokey Mountain National Park as captured by Manish Mamtani Photography in October, 2013.

A galaxy called Mirach’s Ghost

The bright star here is Beta Andromedae, aka Mirach. Look closely, and you'll also see Mirach's Ghost, a faint galaxy, in the upper right of the photo.

Russian missile contrail

A Russian missile contrail yanked back and forth by winds at different heights of our atmosphere.

Heat from the lava flows at Klyuchevskaya

A recently released NASA image of the ongoing 2013 eruption at Klyuchevskaya, one of Russia’s tallest and most active volcanoes.

Our sun for one year

Composite image of a year of activity on our solar system's star, the sun.

Planet Mars in front of Leo

Looking for Mars? You'll find it in the east before dawn, in front of the constellation Leo the Lion.