24 April 2014, 09:23 PM ET
An X1-class flare was recorded in multiple wavelengths by NASA's Solar Dynamics Observatory on April 24th, 2014 EDT (April 25th at 0032 UT).
24 April 2014, 06:09 PM ET
The NASA astronaut who snapped the 20th century's most famous photograph of Earth from space hopes the image can continue helping to protect the planet — not just from the depredations of its human inhabitants, but also from incoming space rocks.
24 April 2014, 05:52 PM ET
See stunning photos of the night sky and sun as seen by stargazers around the world in this Space.com photo gallery for April 2014 made up of images sent in by Space.com readers.
24 April 2014, 02:01 PM ET
An incredibly bright supernova spotted in 2010 has been the subject of a stellar mystery until now.
24 April 2014, 01:09 PM ET
As Einstein predicted, Spacetime warps around massive objects (i.e. galaxies). Light from objects ‘behind’ them (e.g. Supernova PS1-10afx ) is bent and magnified to observers on Earth. Full Story: http://goo.gl/zbEnnK
24 April 2014, 10:56 AM ET
Nearly a quarter century after its launch, two of the Hubble Space Telescope's most well-known instruments have landed in an exhibit at the Smithsonian's National Air and Space Museum in DC. 'Repairing Hubble' displays the orbiting observatory's correctiv
24 April 2014, 10:17 AM ET
Saturn certainly has some oddball moons and astronomers think they're close to explaining how a weird feature formed on one of them. New 3D maps are giving scientists an idea of how Iapetus' strange moons actually formed.
24 April 2014, 09:00 AM ET
NASA officials and Mars exploration advocates discuss manned missions to the Red Planet at the Humans 2 Mars summit, which runs from April 22-24, 2014.
24 April 2014, 06:53 AM ET
NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) slammed into the moon's surface, as planned, in the early hours of April 18, bringing to six the number of spacecraft whose remains are known to dot the lunar far side.
23 April 2014, 11:38 PM ET
This stunning space wallpaper shows a patch of sky from the COSMOS survey, as viewed by XMM-Newton. COSMOS is a project studying how galaxies form and evolve, gathering observations using a variety of ground- and space-based telescopes.
23 April 2014, 04:04 PM ET
On April 29, 2014, the moon will block much of the sun in a so-called annular solar eclipse, also known as a "ring of fire" solar eclipse. See where the solar eclipse will be visible from in this Space.com gallery.
23 April 2014, 12:48 PM ET
The annual meteor shower peaked on April 22nd, 2014 and NASA's All Sky Fireball Network captured many of the streaking meteors as they burnt up in the atmosphere.
23 April 2014, 01:58 AM ET
Guion "Guy" Bluford is a former NASA astronaut who was the first African-American to fly into space. He flew four shuttle missions.
22 April 2014, 11:32 PM ET
This space wallpaper of a galaxy cluster taken by the NASA/ESA Hubble Space Telescope gives a remarkable cross-section of the Universe, showing objects at different distances and stages in cosmic history.
22 April 2014, 04:46 PM ET
A U.S. satellite has captured the ultimate Earth Day view from space, showing the entire planet in a stunning group shot of humanity. The photo, taken today (April 22) to mark Earth Day, was captured by the GOES-East satellite at 7:45 a.m. EDT (1145 GMT)
22 April 2014, 02:00 PM ET
Why can't anything travel faster than the speed of light? Do black holes really suck? And why is the universe expanding? These are just a few of the questions author and astrophysicist Jeffrey Bennett answers in his new book, "What is Relativity?"
22 April 2014, 02:00 PM ET
Many people with a basic knowledge of physics know that Einstein developed the theory of relativity, yet few people actually understand what it means. But author and astrophysicist Jeffrey Bennett relativity should be something anyone can understand.
22 April 2014, 01:58 PM ET
In 2013 and 2014, areas around the globe have experienced record breaking temperatures over extended periods of time. This has led to a diminished water supply, thriving disease carrying insects and fire.
22 April 2014, 10:53 AM ET
Since the start of the 21st century, dozens of incoming asteroids have slammed into Earth, some of them packing far more energy than a city-destroying atomic bomb, a new animation illustrates.
22 April 2014, 09:20 AM ET
Between 2000 and 2013, 26 explosions ranging from 1-600 kilotons have been detected by the Nuclear Test Ban Treaty Organization's network of sensors. -- FULL STORY: http://goo.gl/pKFcCq
22 April 2014, 07:49 AM ET
Today marks the annual celebration of our home planet.NASA has a slew of live events planned to highlight what makes Earth so special. NASA also has many online activities available, too. Here's our NASA Earth Day guide.
22 April 2014, 06:16 AM ET
The Milky Way is a spiral galaxy — but what exactly does it look like? Does it have two, four, or more arms? Astronomers think that now they’re one step closer to the answer.
22 April 2014, 03:40 AM ET
NASA has long held the lead in the exploration of Mars, and that trend will continue, says NASA administrator Charles Bolden.
22 April 2014, 02:24 AM ET
The Triangulum Galaxy (M33) that is about 3 million light-years away from Earth. Among its most distinctive features are ionized hydrogen clouds, which are massive regions of starbirth.
21 April 2014, 06:06 PM ET
Most adults in the United States are not convinced that the universe began with the Big Bang, according to a new Associated Press-GfK poll.
21 April 2014, 04:03 PM ET
Cosmic rays hitting Earth can be trapped in ice, producing radioactive Krypton-81. Scientists have accurately dated a million year old sample through melting ancient ice, and passing the ancient air through an Atom Trap Trace Analyzer.
21 April 2014, 03:47 PM ET
Opportunity has been given a new lease on life after the Red Planet gave the tenacious Mars rover a power-boosting spring clean, blasting dust off its solar panels. Opportunity is still going strong more than 10 years after landing on Mars.
21 April 2014, 03:17 PM ET
A super-bright meteor exploded over the northern Russian city of Murmansk early Saturday morning (April 19), a little more than a year after another airburst lit up the skies above Chelyabinsk, about 1,300 miles to the southeast.
21 April 2014, 01:37 PM ET
The CASIS ARK-1 mission, recently delivered to the ISS, will try to grow Huntington protein crystals for study on Earth. Crystals can grow larger in the microgravity of Low Earth Orbit (LEO).
21 April 2014, 12:59 PM ET
Light pollution not only threatens astronomy, it disrupts wildlife, and affects human health. The yellow glows over cities and towns — seen so clearly from space — are testament to the billions spent in wasted energy from lighting up the sky.
21 April 2014, 07:00 AM ET
The Hubble image, released today, is a 14-hour exposure that shows objects about 1 billion times fainter than the naked eye can see. Most of the visible galaxies lie less than 5 billion light-years away, but some objects are much more distant.
20 April 2014, 08:00 AM ET
At issue is the ability to combine space data with outputs from a global network of seismic, infrasound and hydroacoustic sensors that have been deployed worldwide to provide treaty verification for a nuclear test ban.
19 April 2014, 09:05 AM ET
Carl Sagan launched 'Cosmos,' an epic 1980 TV series that brought science to the public like never before. Now, Sagan's legacy lives on in 'Cosmos: A Spacetime Odyssey' — a 13-episode series airing on Fox. See our complete coverage.
19 April 2014, 07:00 AM ET
From five volcanoes erupting at once to a cross-section of the universe, don't miss these amazing space images of the week for April 19, 2014.
19 April 2014, 07:00 AM ET
From a stunning time-lapse of the Milky Way to the Blood moon, don't miss these amazing night sky images by stargazers and Space.com readers.
18 April 2014, 01:52 PM ET
An essential nutrient for life on Earth also cooks up in space, a new study finds.