31 July 2013, 03:43 PM ET
A gas planet about four times the size of Jupiter may be giant, but it's one of the smallest planets ever captured on camera, according to a new study.
31 July 2013, 01:44 PM ET
Future life-seeking missions on other worlds may be in for a tough time if all evidence of past or present life is below the surface. Researcher Jan Amend is studying microbes that live underground on Earth.
31 July 2013, 11:48 AM ET
Saturn, Venus, Mars, Mercury and Jupiter will all be visible in the August night skies, as will the annual Perseid meteors. A number of nebulas will also be easy to find among the constellations.
25 July 2013, 07:00 AM ET
The International Space Station is undergoing an engineering analysis and risk assessment to gauge its ability to keep operating until 2020 and beyond. The in-depth appraisal is being wrapped up for delivery to NASA by the end of September.
24 July 2013, 03:09 PM ET
The riddle of the age of meteorites from Mars might now be solved, with researchers finding these rocks from the Red Planet might not be billions of years old as some studies previously suggested. The new findings shed light on when the Martian crust form
24 July 2013, 02:28 PM ET
A new photo by NASA's sharp-eyed Mars Reconnaissance Orbiter shows the agency's Curiosity rover wrapping up work near its landing site before beginning the long trek to the huge and mysterious Mount Sharp, its ultimate science destination.
24 July 2013, 06:00 AM ET
NASA's Mars rover Curiosity is really starting to stretch its legs on the Red Planet. The 1-ton robot made by far the longest drive of its nearly year-long surface mission on Sunday, traversing 329 feet of Martian terrain.
19 July 2013, 03:27 PM ET
Using images taken from the High-Resolution Stereo Camera aboard ESA's Mars Express, this fly-through was created. It is located in the northernmost part of Valles Marineris.
19 July 2013, 03:24 PM ET
NASA has granted funding to a dozen imaginative tech concepts, in the hopes that one or more of them will lead to big breakthroughs in space science and exploration. The 12 ideas were selected under Phase 1 of the NASA Innovative Advanced Concepts Program
18 July 2013, 02:01 PM ET
Mars is not a nice place to live. New data collected by NASA's Mars rover Curiosity and studies of ancient Martian meteorites show that Mars' atmosphere probably hasn't changed very much in about 4 billion years.
18 July 2013, 07:01 AM ET
Did life on Earth originate on Mars? Or did Earth dispatch life to Mars during an exchange of meteorites between both planets more than 3.5 billion years ago?
18 July 2013, 07:00 AM ET
NASA's Mars rover Curiosity has notched a mileage milestone, reaching 1 kilometer (0.6 miles) of total driving distance as it heads toward a huge and mysterious Red Planet mountain. The 1-ton rover rolled past the mark on Wednesday, when a 125-foot (38 me
17 July 2013, 02:10 PM ET
July is full of encounters between astronomical objects, and the action continues this weekend with three different planets taking center stage. Venus will dance with the star Regulus Sunday evening, while Mars and Jupiter will be visible in Gemini (The T
17 July 2013, 07:00 AM ET
Evidence continues to mount that a huge ocean covered much of the surface of Mars billions of years ago. Scientists have spotted what appears to be an ancient river delta, which may have emptied into a vast ocean that inundated up to one-third of the Red
16 July 2013, 07:00 AM ET
Four billion years ago, Mars had abundant water and a substantial atmosphere. Life could have evolved there, but its reign would have been short. See how scientists are planning to seek out signs of past or present life on Mars.
16 July 2013, 07:00 AM ET
Finding life on Mars isn't easy. Scientists still haven't been able to detect a definitive sign that either single cellular or multicellular life once roamed the Red Planet.
15 July 2013, 05:24 PM ET
NASA's Mars rover Curiosity is pressing forward with an epic Red Planet road trip, a long-distance drive aimed at the central mountain of its landing site. Curiosity began its long drive July 4 and completed three separate trips in so far.
13 July 2013, 10:19 AM ET
In mid-July 2013, skywatchers will be able to observe the moon moving in relation to Spica and Saturn. Also, Mars and Jupiter appear to move together in the morning sky.
12 July 2013, 10:15 AM ET
NASA's Mars rover Curiosity has begun the long journey to the mission's main destination, Mount Sharp. See how it’s driving long hauls on Mars.
12 July 2013, 10:15 AM ET
A team of scientists and engineers gives proposals for NASA's 2020 Mars rover mission, a mission that will borrow the design of the 1-ton Curiosity and seek out ‘biosignatures’ on Mars.
11 July 2013, 05:04 PM ET
Just as on Earth, a group of people working together for a length of time on Mars will face some tensions. Now, NASA scientists are developing devices to monitor how astronauts are getting along to ensure a cohesive team on the Red Planet.
11 July 2013, 07:00 AM ET
The Soviet Union's Lunokhod 2 rover did indeed travel about 3 miles farther on the surface of the moon than originally thought, meaning that any robot hoping to break its distance record will have to run a full marathon, researchers say.
10 July 2013, 07:00 AM ET
Some people may be disappointed that NASA's next Mars rover won't carry a life-detection experiment, but hunting for currently existing Red Planet microbes is decidedly premature at this point, mission planners say. Looking for past life is a better bet.
09 July 2013, 09:28 PM ET
Antares is a red supergiant that one day will explode into a supernova.
09 July 2013, 04:57 PM ET
Officials in charge of Europe's ExoMars rover, part of a joint Mars exploration project with Russia, say they are confident the life-seeking robot will reach the Red Planet's surface despite Russia's record of star-crossed Mars missions.
09 July 2013, 03:26 PM ET
NASA's next Mars rover, slated to launch in 2020, should hunt for signs of past Red Planet life and collect samples for eventual return to Earth, a team of mission planners has determined. The robot should explore a site that once was habitable, make its
09 July 2013, 12:43 PM ET
Democrats in the House are set to unveil their own NASA authorization bill, which unlike a much leaner Republican proposal would authorize $18.1 billion in spending for 2014 — more than NASA has gotten since 2011.
09 July 2013, 09:55 AM ET
NASA will discuss plans for its Mars rover launching in 2020, a huge robot slated to borrow the design of the agency's Mars rover Curiosity. The rover is expected to lay the groundwork for future manned Mars missions.
08 July 2013, 08:11 PM ET
NASA's Mars rover Curiosity has set out on its first big road trip, a long journey that will traverse miles of Red Planet scenery over the course of a year or so. It's heading for the base of Mount Sharp, which lies about 5 miles away.
08 July 2013, 07:12 PM ET
NASA's response to a seven-year-old boy who wants to be an astronaut has created quite a stir on the Internet Monday (July 8), surprising many people who apparently equate mailing letters to government agencies with chucking them in the nearest wastebaske
08 July 2013, 07:17 AM ET
Research into how Australian opals formed points toward Mars geology.
08 July 2013, 07:00 AM ET
A prototype Mars rover named Zoe recently drove, drilled and performed experiments autonomously in the Atacama to test out gear for future Red Planet missions.
05 July 2013, 01:40 PM ET
This vivid space wallpaper is a color-coded topographical map of the southeastern flank of the Olympus Mons volcano on Mars.
03 July 2013, 07:00 AM ET
The 30-second video shows the tiny moon Phobos climbing high into the Red Planet sky.
02 July 2013, 03:25 PM ET
The Mars Science Laboratory snapped imagery during a pass of the Martian moon shortly after sunset. Twenty seven minutes are sped up in this time-lapse.
02 July 2013, 11:30 AM ET
Research shows radiation not an obstacle to sending colonists to Mars.