On spring mornings, from either hemisphere, you can't easily see Mercury. Peter Lowenstein in Mutare, Zimbabwe - 19 degrees south latitude, where it's autumn now - shares this month's excellent Southern Hemisphere view of Mercury, as the old moon swept past.

At a meeting of experts in London last week, citizen scientists Gerald Eichstädt and Seán Doran wowed the audience with this new composite, plus a new dazzling animation, of the giant planet Jupiter.

In the darkness of the distant universe, galaxies resemble glowing fireflies, flickering candles, or sparks floating up from a bonfire.

Those were the words of astrophotographer Yuri Beletsky, who captured this image on May 10 from Las Campanas Observatory in Chile.

Venus and Jupiter are the sky's 2 brightest planets, and they hang on either side of your sky now - Jupiter in the east and Venus in the west - shortly after the sun goes down.

Ladd Observatory is located at Brown University in Providence in the U.S. state of Rhode Island.

Kilauea is one of the world’s most active volcanoes. Here are images and video from its ongoing eruption in Hawaii.

Who says you can't catch meteors in moonlight? Check out this beautiful shot of one of this weekend's Eta Aquariid meteors from Eliot Herman in Tucson.

NASA's SDO captured the sun's only visible active region putting on a fine display.

A rainbow happens when sunlight hits water droplets in the air. Look opposite the sun after or during a rain shower.