24 June 2014, 03:06 PM ET
The mysterious signal was detected by NASA's X-Ray Observatory and ESA's XMM-Newton in the Perseus galaxy cluster and 73 others. Scientists think that this may be the work of a hypothetical particle called a sterile neutrino.
24 June 2014, 02:36 PM ET
The Big Bear Solar Observatory has delivered high definition views of a sunspot. The data will be used to unravel mysteries presented by these dark and concentrated magnetic fields.
24 June 2014, 09:20 AM ET
Scientists have identified what is possibly the coldest known white dwarf. In fact, this dim stellar corpse is so cold that its carbon has crystallized, effectively forming a diamond the size of Earth, astronomers say.
24 June 2014, 07:30 AM ET
Curiosity wraps up its 687th day on Mars today (June 24), NASA officials said, meaning the 1-ton robot has completed one lap around the sun on the Red Planet.
23 June 2014, 06:05 PM ET
A new 3D map of the Milky Way puts the dust that permeates the galaxy on display in great detail. Astronomers mapped the dust between stars in the Milky Way to create the colorful photo that spans the part of the galaxy seen from Earth's Northern Hemisphe
23 June 2014, 04:44 PM ET
When NASA's New Horizons spacecraft leaves the solar system, it will carry with it a digital message from people on Earth.
23 June 2014, 04:02 PM ET
Jupiter's largest moons don't go completely dark when the giant planet blocks their sunlight. The discovery could reveal more about Jupiter's upper atmosphere, which may keep the moons lit when they are not directly illuminated by the sun.
23 June 2014, 09:09 AM ET
NASA Cassini mission images from July 2013 of Titan's Ligeia Mare region show an island that was not there in previous imagery. What could it be?: http://goo.gl/f0hNPs
23 June 2014, 07:15 AM ET
A mysteriously bright anomaly winked in and out of existence on the seas of Saturn's largest moon, Titan — potentially the first time waves, bubbles or some other unknown features have been seen there, scientists say.
20 June 2014, 10:21 PM ET
What was your favorite space news story of the last week?
20 June 2014, 10:02 PM ET
From a strange gas stream blotting out a galaxy's bright core to perfect espresso in space, don't miss these amazing space images of the week for June 21, 2014.
20 June 2014, 05:55 PM ET
A celebrated and controversial astrophysics discovery is about to receive even more scrutiny. In March, a team of astronomers announced that they had spotted the signature of primordial gravitational waves in the cosmic microwave background (CMB).
20 June 2014, 03:28 PM ET
Comet 67P/Churyumov-Gerasimenko, with which the European Space Agency's Rosetta probe will rendezvous in early August, shows no signs of the dust cloud it sported in April and May, new photos reveal.
20 June 2014, 01:31 PM ET
A new observatory high in the mountains of Mexico is combining high altitudes and tanks of extra-pure water to attempt to solve one of the greatest unanswered questions in all of physics.
20 June 2014, 12:50 PM ET
NASA's Solar Dynamics observatory captured imagery of dark strands of plasma erupting away from the surface of the Sun on June 19th, 2014. The ensuing coronal mass ejection was captured by the NASA / ESA SOHO observatory.
20 June 2014, 07:23 AM ET
A comet's close brush with Mars later this year shouldn't threaten the spacecraft circling the Red Planet, researchers say.
20 June 2014, 07:20 AM ET
New observations by NASA's Spitzer Space Telescope suggest that a space rock known as 2011 MD is a viable option to snag and drag into orbit around the moon, bringing the number of "valid candidates" for the mission at this point to six.
20 June 2014, 03:11 AM ET
The Palomar Observatory is an astronomical research center where several small worlds were discovered near the edge of the solar system.
19 June 2014, 06:28 PM ET
Part of the peak of the Cerro Armazones mountain in Chile was blown up to make way for Europe's Extremely Large Telescope (E-ELT). When constructed it will become the largest optical/infrared telescope in the world. FULL STORY: http://goo.gl/4eHZga
19 June 2014, 04:55 PM ET
The space agency has awarded a total of $4.9 million to 18 proposals that could advance and flesh out the asteroid-retrieval plan, which aims to drag a space rock into orbit around the moon for future visitation by astronauts, officials announced today (J
19 June 2014, 04:27 PM ET
A modest mountaintop blast in Chile kicked off construction of the largest optical/infrared telescope ever built on Earth.
19 June 2014, 02:56 PM ET
The bright center of a distant galaxy strangely and unexpectedly darkened recently, and now scientists think the culprit was a rare, powerful stream of gas blowing in front of it, eclipsing its heart.
19 June 2014, 02:24 PM ET
In 2013, astronomers became aware the center of galaxy NGC 5548 had seemingly gone dark. Astrophysicist Jelle Kaastra and team now think they know why: a stream of obscuring gas blown by the action of the central supermassive black hole.
19 June 2014, 08:57 AM ET
Using new observations from the Hubble Space Telescope, astronomers have been able to determine that dwarf galaxies were producing stars at a faster rate than previous studies. FULL STORY: http://goo.gl/j3ZB8m
19 June 2014, 08:01 AM ET
Galaxies are churning out new stars all the time, but most of the universe's stars formed between two and six billion years after the Big Bang. The new observations, by the Hubble space telescope, capture the dwarf galaxies during this dramatic epoch.
19 June 2014, 07:29 AM ET
The sun is supposed to be at the height of its 11-year active cycle, but for the most part things have been pretty quiet.
18 June 2014, 06:30 PM ET
An astronomy organization will blast away the top of a mountain to make room for a giant telescope tomorrow (June 19), and you can watch the explosion live online.
18 June 2014, 02:40 PM ET
During today's encounter — the 103rd Titan flyby for Cassini over its long operational life — the probe will skim just 2,274 miles (3,660 kilometers) above the moon at a speed of 13,000 mph (20,920 km/h), NASA officials said.
18 June 2014, 09:03 AM ET
Using bright galaxies known as quasars, scientists have calculated the rate of the expansion of the universe to an unheard of accuracy out to distances of nearly 12 billion light-years.
18 June 2014, 07:27 AM ET
Near-Earth asteroids have Earth-like orbits, so their collisions with our planet tend to be glancing blows from behind or from the side. But comets travel around the sun in more random paths and can thus slam into our planet head-on.
18 June 2014, 07:24 AM ET
In March, a team of researchers announced that they had found evidence of primordial gravitational waves, ripples in space-time from the universe's earliest moments. But other scientists have already begun questioning the discovery.
17 June 2014, 03:10 PM ET
The two different classes of jet-spewing active galaxies called blazars may, in fact, be a single hybrid type that evolves over time, according to new research.