30 July 2014, 01:54 PM ET
Earth and Moon in the Hadean epoch were pummeled by large impacts letting magma flow out. But, at the same time, some parts of Earth’s surface could have retained liquid water, allowing pre-biotic compounds to form; perhaps even life itself.
30 July 2014, 01:01 PM ET
Cosmic bombardment of the early Earth repeatedly covered the planet's surface with molten rock during its earliest days, but still may have left oases of water that could have supported the evolution of life, scientists say.
30 July 2014, 01:01 PM ET
Some of the oddly skewed orbits of many alien worlds may be due to the twin stars they are often found circling, a new study suggests.
30 July 2014, 01:00 PM ET
The binary system HK Tauri's ‘wildly misaligned’ discs of dust and gas may help explain why some exoplanets have eccentric orbits around their Suns. The Atacama Large Millimeter/submillimeter Array (ALMA) imaged the system. More: http://goo.gl/XMR3Hz
30 July 2014, 01:00 PM ET
Tidal forces exerted during the solar system's youth can explain most of the moon's large-scale topography, including its slight lemon shape, reports the study, which was published online today (July 30) in the journal Nature.
30 July 2014, 07:21 AM ET
A private team is priming a 36-year-old NASA spacecraft to perform new science as it travels through interplanetary space after attempts to move the probe into a position closer to Earth failed.
29 July 2014, 04:35 PM ET
A company plans to place two new cameras on the outside of the International Space Station in a bid to provide more live views of Earth from space.
29 July 2014, 02:40 PM ET
Don't miss this amazing collection of images taken by crewmembers aboard the International Space Station showing beautiful auroras in the skies over Earth.
29 July 2014, 02:23 PM ET
Attempts to move a 36-year-old NASA probe closer to Earth have failed, but only because the vintage spacecraft is simply out of gas, according to the team of volunteer engineers now controlling the spacecraft.
29 July 2014, 11:30 AM ET
If a huge solar eruption in 2012 had hit the Earth, the effects would have been so devastating that we'd still be recovering two years later, scientists working on several new studies conclude.
29 July 2014, 07:17 AM ET
The icy Saturn moon Enceladus sports at least 101 geysers, which reach all the way down to the satellite's subsurface ocean, new research suggests.
28 July 2014, 05:19 PM ET
As of Sunday (July 27), Opportunity had traveled a total of 25.01 miles on the Red Planet, NASA officials said. The record had been held by the Soviet Union's remote-controlled Lunokhod 2 rover, which covered 24.2 miles on the moon in 1973.
28 July 2014, 04:31 PM ET
This fall, the New York City home of NASA's space shuttle Enterprise will focus its attention on another big piece of space history: the Hubble Space Telescope.
28 July 2014, 04:01 PM ET
By peering into the haze of Saturn's huge moon Titan, scientists could learn more about how the atmospheres of alien worlds behave.
28 July 2014, 01:29 PM ET
Arizona-based World View, which aims to loft passengers to the stratosphere by late 2016, will start launching research and education payloads on its unmanned test flights later this year, company officials said.
28 July 2014, 07:39 AM ET
The supermassive black hole at the center of a far-off galaxy is putting on a fireworks display of cosmic proportions.
26 July 2014, 01:26 PM ET
A volunteer crew of mock Mars explorers emerged from their Martian habitat Friday (July 25) after four months living inside a dome atop a Hawaiian volcano. See how the HI-SEAS 2 mock Mars mission crew lived and worked on a 'Red Planet.'
26 July 2014, 01:04 AM ET
Fix your gaze upon the moon.
25 July 2014, 04:04 PM ET
From a look again at the first footprints on the moon to the ISS view of Gaza, don't miss these amazing space images of the week for July 26, 2014.
25 July 2014, 11:27 AM ET
Curiosity has just crossed out of its landing ellipse, the 12- by 4-mile(19 by 7 kilometers) zone targeted for its August 2012 touchdown and is now moving toward an increasingly challenging landscape called the Zabriskie Plateau.
25 July 2014, 07:17 AM ET
Using observations by NASA's Kepler and Spitzer space telescopes, researchers determined that the exoplanet Kepler-93b is 1.48 times the size of Earth, allowing scientists to conclude that the planet is very likely composed of iron and rock.
25 July 2014, 07:00 AM ET
Is the moon made of green cheese? Is it a hollow spaceship? Apollo 11 helped put these and other ideas to rest.
24 July 2014, 04:34 PM ET
The Hubble Space Telescope has created the most detailed map ever of the star-filled halo encircling Centarus A, the closest giant elliptical galaxy to our Milky Way galaxy. The map reveals a surprising amount of heavy metals along the halo's outer edge.
24 July 2014, 02:44 PM ET
The cloudier an alien planet is, the closer it can get to its star and still remain potentially life-friendly, researchers say. See what it means for life on planets even as hellish as Venus.
24 July 2014, 12:06 PM ET
NASA's STEREO spacecraft captured imagery of recently discovered Comet Jacques on its nearest approach to the Sun as the object was moving at over 110,000 miles per hour. The comet can be spotted in the pre-dawn hours.
24 July 2014, 10:33 AM ET
Imagery from the Rosetta mission has been used to create a visualization of periodic comet 67P/Churyumov–Gerasimenko. The probe insert itself into orbit around the comet in the first week of August 2014.
23 July 2014, 04:56 PM ET
Scientists are still debating whether NASA's Voyager 1 spacecraft is in interstellar space, but a new study outlines a test that could definitively show where the far-flung probe is on its journey out of the solar system.
23 July 2014, 01:30 PM ET
The United States is outsourcing space exploration to other countries, something that should be a cause for concern.
23 July 2014, 01:08 PM ET
See photos from the European Space Agency's Automated Transfer Vehicle 5 (ATV-5) mission to the International Space Station in this Space.com gallery. ATV-5 is Europe's fifth and final planned ATV mission.
23 July 2014, 12:03 PM ET
NASA's first Landsat mission launched in July 1972. Seven more satellites have been launched since. Two of these, Landsat 7 & 8, are still active. The program acquired science imagery of natural disasters, urban change, water, ice, and farming.
23 July 2014, 10:20 AM ET
The agency's Chandra X-ray Observatory — one of NASA's 'Great Observatories,' along with the Hubble and Spitzer space telescopes and the now-retired Compton Gamma Ray Observatory — launched aboard the space shuttle Columbia on July 23, 1999.
23 July 2014, 08:46 AM ET
The NASA space-based telescope has delivered amazing imagery of the hidden Universe and expanded our knowledge of black holes, dark matter and the life and death of stars. It was launched on July 23rd, 1999 aboard the Space Shuttle Columbia.