29 September 2015, 11:38 AM ET
Scientists recently announced they had discovered flowing water on Mars, boosting the odds of extraterrestrial life, but why is water so essential to life in the first place?
28 September 2015, 11:53 AM ET
The enigmatic dark streaks called recurring slope lineae (RSL) that appear seasonally on steep, relatively warm Martian slopes are probably caused by salty liquid water, researchers said.
28 September 2015, 11:30 AM ET
Scientists say they've found evidence of flowing water on Mars. Salty brines found in dark streaks that show up and disappear throughout the Martian year are evidence that briny water is flowing on the Red Planet, scientists say.
28 September 2015, 08:03 AM ET
On Sunday evening, a moon that appeared abnormally large and bright in Earth's skies dove into the planet's shadow, turning a gorgeous reddish-gold in the process. It was the first supermoon total lunar eclipse since 1982, and the last until 2033.
27 September 2015, 01:00 PM ET
Tonight, an oversized ruby-colored sphere will rise in the sky as a total lunar eclipse turns the normally pallid moon scarlet.
27 September 2015, 08:21 AM ET
If you pick one night this year to go out and look up, make it tonight. If skies are clear, expect a delightful treat as a total lunar eclipse occurs in rare circumstances that will render the moon slightly bigger than normal, a so-called supermoon.
26 September 2015, 10:59 AM ET
From sky bears duking it out with the moon to coital relationships between celestial bodies, people have been making up cool stories to explain lunar eclipses for a very long time.
25 September 2015, 12:51 PM ET
This Sunday's supermoon eclipse doesn't mark the end of the world as we know it.
25 September 2015, 07:11 AM ET
The majority of people believe that intelligent aliens are out there, and many want to reach out. The survey found that men are more likely to believe in intelligent aliens than are women, and also more likely to say humanity should reach out.
25 September 2015, 06:56 AM ET
A rare supermoon lunar eclipse will grace the night sky on Sunday (Sept. 27), and if you live in the Western Hemisphere, you could have spectacular views of this celestial treat.
24 September 2015, 03:51 PM ET
A poll recently showed that greater than one in two persons polled believes that intelligent extraterrestrial life lurks somewhere in the cosmos.
24 September 2015, 12:43 PM ET
A steady hand and a long lens capture a jet and its contrails cutting across a beautiful blue channel by Great Exuma Island in the Bahamas.
24 September 2015, 12:03 PM ET
Here's a skywatching guide for the Sept. 27 "supermoon" total lunar eclipse — the first such event since 1982, and the last until 2033.
23 September 2015, 09:13 AM ET
Simulations suggest that Saturn's north polar hexagon is shaped by shallow jets at the cloud level. Winds below the cloud level apparently help keep the shape of the hexagon sharp and control the rate at which the hexagon drifts.
21 September 2015, 04:56 PM ET
With a week until the huge supermoon lunar eclipse, it's time to dust off your small telescopes and binoculars, track down an observatory event or webcast, or draft your invitations for a moon-cake party.
18 September 2015, 02:16 PM ET
The photo, which New Horizons took during its epic July 14 flyby of Pluto, captures a sunset view. Towering ice mountains cast long shadows, and more than a dozen layers of the dwarf planet's wispy atmosphere are clearly visible.
17 September 2015, 02:00 PM ET
Lead actor Matt Damon describes how Ridley Scott's film – and Andy Weir's book – can perk students’ curiosity, in this conversation with Space.com's @DavidSkyBrody at NASA's Jet Propulsion Lab.
17 September 2015, 12:04 PM ET
A slight wobble in the orbit of Saturn's moon Enceladus can only be explained by a global ocean beneath its crust.
16 September 2015, 11:10 AM ET
The Defense Advanced Research Projects Agency (DARPA) is developing a highly capable robotic arm that could make a potentially transformative space "transportation hub" possible in the relatively near future.
14 September 2015, 07:39 AM ET
Maybe you've seen a double rainbow, but what about a double meteor strike?
10 September 2015, 11:46 AM ET
A giant slab of ice as big as California and Texas put together lurks just beneath the surface of Mars between its equator and north pole, researchers say. This ice may be the result of snowfall tens of millions of years ago on the Red Planet.
10 September 2015, 11:15 AM ET
NASA's New Horizons spacecraft has begun beaming home tens of gigabits of data gathered during its historic July 14 flyby of Pluto. The entire flyby data set should be on the ground in about 12 months.
08 September 2015, 04:15 PM ET
On Sept. 7th, 2015, European astronaut Andreas Mogensen – orbiting 240+ miles up and flying at 17,000+ mph – placed a peg in a hole on Earth; a demonstration of teleoperation using a force-feedback controlled machine system built by ESA.
03 September 2015, 11:49 AM ET
NASA is teaming up with California-based company Arx Pax, which has developed a real-life hoverboard using a technology called Magnetic Field Architecture. The goas is to find a way to manipulate tiny satellites called cubesats.
01 September 2015, 11:57 AM ET
As astronomers get closer to finding potential signatures of life on faraway planets, a new mathematical description shows how to understand life's spread — and to determine if it's jumping from star to star.
27 August 2015, 10:05 AM ET
Mars is not going to look as big as the moon in the night sky. But the fact that we want it to may say something about us.
27 August 2015, 08:18 AM ET
Here are some misconceptions about Mars that just won't die.
26 August 2015, 09:03 AM ET
Hawking and two colleagues propose that information isn't destroyed at the heart of a black hole; it's stored at the black hole's boundary in holographic form.
24 August 2015, 02:52 PM ET
Solar explosions can threaten power grids even in areas near the equator, places long thought safe from such disruptions from the sun, say researchers who studied a weird flow of electricity pulsing above the equatorial regions.
20 August 2015, 01:28 PM ET
Something mysterious is happening on the surface of Pluto: No matter how much nitrogen the atmosphere releases into space, it's still chock-full of the stuff. New work examines the possible culprits for the stealthy nitrogen resupply.
20 August 2015, 01:21 PM ET
For the last few months, rumors have circulated that a big asteroid will slam into Earth near Puerto Rico between Sept. 15 and Sept. 28, wreaking widespread destruction. Don't believe the hype.
18 August 2015, 02:10 PM ET
An astrophotographer spotted a beautifully-formed solar prominence that looks like a giant version of the famous Parisian landmark.