Unusual rainbow over Spain

Remember the quadruple rainbow image that went viral last month? Here's an even more unusual rainbow, caused by the wave nature of light.

Eta Aquarid meteors from Atacama desert

The 2015 Eta Aquarid meteor shower was drowned in bright moonlight. Still, Yuri Beletsky in Chile captured enough meteors to create this beautiful composite.

Large sunspot group AR 2339

After a period of few to no spots, a large sunspot group emerged on May 5. It has already produced an X-flare!

Mammatus clouds at sunset, over Idaho

Mammatus clouds can appear ominous. But, in a way that’s so common in nature, their dangerous aspect goes hand in hand with a magnificent beauty.

Sun and moon halo

Composite image of a halo around the sun and, within 10 hours, a nearly full moon.

Nugget Point in New Zealand

"Sometimes you know you are in the right place at the right time. That you are doing what you are meant to be doing. That it all comes together and your heart sings."

What bird song looks like at dawn

A meadowlark sings as dawn breaks at the Ninepipes National Wildlife Refuge in northwestern Montana.

Aerosols from Chile’s Calbuco volcano reach Africa

The aerosols from the eruption of Calbuco volcano in Chile caused vivid sunsets in South America last week. Now they've crossed the South Atlantic, to Africa.

Crescent comet

The co-orbit around the sun of the Rosetta spacecraft and Comet 67P/Churyumov–Gerasimenko lets the spacecraft see the comet, at times, in a crescent phase.

MESSENGER’s final image from Mercury

A last image from the MESSENGER spacecraft before crashing onto Mercury's surface on Thursday. So long, MESSENGER, and thank you.

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