Enjoying EarthSky? Subscribe.

208,830 subscribers and counting ...

Today’s Image

View larger. | The object between the tick marks is Supernova 2016cok, which came into view in Earth's sky this weekend. Photo by Gianluca Masi of the Virtual Telescope Project in Italy, May 29, 2016.
Today's Image | May 30, 2016

Supernova erupts in M66

M66 is a galaxy 36 million light-years away in the direction to our constellation Leo. A star exploded there 36 million years ago … and came into view in Earth’s sky this weekend.

Image credit: NASA/JPL/Space Science Institute
Today's Image | May 28, 2016

Saturn’s south polar vortex

A monstrous vortex sits at Saturn’s south pole. It’s not just beautiful. It also lets astronomers peer deep into Saturn’s dense atmosphere.

Mosaic image of Africa, contains modified Copernicus Sentinel data (2016), processed by Brockmann Consult/ Université catholique de Louvain as part of ESA’s Climate Change Initiative Land Cover project
Today's Image | May 27, 2016

Cloud-free Africa

The European Space Agency used 7,000 satellite images – acquired from late 2015 through early 2016 – to make this mosaic of Africa.

View larger.  | May 21, 2016 image via Stereo-A.
Today's Image | May 26, 2016

Spacecraft spies Saturn, Mars, Earth

Maybe you’ve seen Saturn and Mars close together in the sky recently? NASA’s Stereo-A probe caught Saturn and Mars … with Earth in between.

Photo by Yuri Beletsky in the Atacama Desert.
Today's Image | May 25, 2016

Sunrays seen from Chile

Crepuscular rays, sometimes called sunrays, above the famous volcano Licancabur on the border between Chile and Bolivia.

Today's Image | May 24, 2016

Hubble spies a comet’s rotating jet

In March, Comet 252P/LINEAR passed exceedingly near the Earth. These images show the closest celestial object Hubble has observed, other than Earth’s moon.

Full moon over Dallas via Ben Zavala.
Today's Image | May 23, 2016

Best Mars photos, May 2016

These past weeks have been a fabulous time to view Mars, which swept closest to Earth on Mars 30. Best photos from the EarthSky community!

Diagram by Roy L. Bishop.  Copyright Royal Astronomical Society of Canada. Used with permission.  Visit the RASC estore to purchase the Observers Handbook, a necessary tool for all skywatchers.
Today's Image | May 22, 2016

Mars oppositions 2010 – 2022

Here’s why 2016 is an awesome year for Mars, and why 2018 will be even better.

View larger. | This image shows our neighbouring planet Mars, as it was observed shortly before opposition in 2016 by the NASA/ESA Hubble Space Telescope. Some prominent features of the planet are clearly visible: the ancient and inactive shield volcano Syrtis Major; the bright and oval Hellas Planitia basin; the heavily eroded Arabia Terra in the centre of the image; the dark features of Sinus Sabaeous and Sinus Meridiani along the equator; and the small southern polar cap. Image via NASA, ESA, Hubble Heritage Team, J. Bell, M. Wolff.
Today's Image | May 21, 2016

New Hubble image of Mars

New Hubble Space Telescope image of Mars, in honor of the planet’s May 22 opposition, when our planet Earth will sweep between the Red Planet and the sun.

Hubble Space Telescope image of Proxima Centauri, the closest known star to the sun.  Read more about this image.
Today's Image | May 19, 2016

Proxima Centauri, our sun’s nearest neighbor

Proxima Centauri, one of three stars in the Alpha Centauri system, is our sun’s nearest known neighbor among the stars. It’s 4.22 light-years away.

Photo by Jeff Berkes Photography.
Today's Image | May 18, 2016

Milky Way over the Outer Banks

Jeff Berkes captured this image earlier this month, during a night sky photography workshop.

Photo taken May 13, 2016 by Yuri Beletsky in Chile.
Today's Image | May 16, 2016

Moon halo, stars, planet over Chile

Haloes around the moon happen when moonlight shines through tiny ice crystals in the upper air. Here’s a moon halo, with bright stars and Jupiter nearby.

Photo credit: Tom Wildoner
Today's Image | May 15, 2016

Acadia at 3 a.m.

Tom Wildoner captured this view on May 12 in Maine’s Acadia National Park. See bright Mars on the right.

View larger. | This is one of the most colorful places on Mars, as seen by NASA's Mars Reconnaissance Orbiter on February 5, 2016.  It's the The Nili Fossae region, located on the northwest rim of Isidis impact basin. Image via NASA/JPL-Caltech/Univ. of Arizona.
Today's Image | May 11, 2016

Where red Mars looks blue

Most images of Mars show colors homogenized by red dust and regolith. This infrared-red-blue color image shows Mars’ bedrock … and many colors.

May 9, 2016, transit of Mercury from Megastar Carpentier Photography in France.
Today's Image | May 09, 2016

See it! Monday’s transit of Mercury

Photos from the EarthSky community of the May 9, 2016, transit of Mercury across the face of the sun. Thanks to all who posted!

Photo taken May 8, 2016 by Helio C. Vital.
Today's Image | May 09, 2016

Airplane crosses sun’s face

While preparing on Sunday to watch today’s transit – an event Mercury crosses the face of our sun – Helio C. Vital caught an airplane doing the same.

Long meteor caught during the peak of last week's Eta Aquarid meteor shower, May 6, 2016.  Photo by Darla Young.
Today's Image | May 07, 2016

Long meteor over Arkansas

Meteor showers happen when Earth passes through a stream of icy debris left behind by a comet. The famous Comet Halley spawned last week’s Eta Aquarids.

View larger. |  Image via EarthSky Facebook friend Tommy Richardson Photography. Visit's Tommy's website.
Today's Image | May 06, 2016

First light over Norway’s island Senja

First light of the morning and a perfectly still lake, just north of the Arctic Circle.

Photo: Walter E. Elliot
Today's Image | May 05, 2016

Clouds over White Lake Channel

On May 2, 2016, Walter E. Elliot took this shot of clouds rolling over the channel that connects Michigan’s White Lake to Lake Michigan. Doesn’t it look like an oil painting?

Photo by Hector Rafael Vazquez Rispoli.
Today's Image | May 04, 2016

A mix of dark dust and bright stars

Vast dust clouds stretch across a rich starfield in near the northern boundary of the southern constellation Corona Australis, the Southern Crown.

Photo taken April 11, 2016, in La Fortuna de San Carlos, Costa Rica, by Sergio Vindas. Visit Sergio online.
Today's Image | May 03, 2016

Milky Way over Arenal Volcano in Costa Rica

“Since three years ago, we have planned to shoot this photo. We went to the zone repeatedly but every time we got nothing … until now.” – Sergio Vindas