20 May 2015, 11:30 AM ET
The unmanned X-37B spacecraft launched atop a United Launch Alliance Atlas V rocket today (May 20) at 10:45 a.m. EDT from Florida's Cape Canaveral Air Force Station. The booster also carried the Planetary Society's tiny LightSail to orbit.
19 May 2015, 07:00 AM ET
The United States Air Force's X-37B robotic space plane is scheduled to launch on its fourth mission this Wednesday (May 20). Just what it will be doing, and for how long, is a mystery.
19 May 2015, 07:00 AM ET
The Planetary Society's LightSail craft will hitch a ride on the rocket that blasts the United States Air Force's X-37B space plane into orbit on its latest mystery mission Wednesday. LightSail aims to advance solar sailing technology.
18 May 2015, 04:47 PM ET
The NASA payload aims to test how the space environment affects certain materials. The experiment is flying aboard the U.S. Air Force's unmanned X-37B spacecraft, which is scheduled to blast off Wednesday from Cape Canaveral.
18 May 2015, 04:24 PM ET
An innovative concept for tiny probes attached to gliders could one day allow small robots to explore intricate locales on Mars that probes never could reach before, scientists say.
18 May 2015, 01:34 PM ET
Three boulders balancing like ballerinas have been spotted on the surface of a comet by the Rosetta spacecraft. Only a small area on the surface of each rock is touching the ground, similar to "balancing rocks" seen on Earth.
18 May 2015, 07:00 AM ET
NASA and the European Space Agency are working together on a mission that would test out asteroid-deflection technologies. The Asteroid Impact and Deflection Assessment aims to slam a robotic probe into a space rock in 2022.
17 May 2015, 10:33 AM ET
A Russian cargo craft may have failed due to a problem with the rocket that launched it into space, and an astronaut explains how to "go" in space. Here are Space.com's top stories of the week.
17 May 2015, 09:17 AM ET
From the coast of Japan to a dragon selfie, don't miss these amazing space images of the week for May 17, 2015.
17 May 2015, 07:01 AM ET
The unmanned X-37B spacecraft is scheduled to launch Wednesday (May 20) at 10:45 a.m. EDT atop a United Launch Alliance Atlas V rocket from Florida's Cape Canaveral Air Force Station, kicking off the vehicle's fourth mission.
14 May 2015, 12:47 PM ET
See amazing images of the night sky and cosmos in SPACE.com's gallery of cosmic images posted in April 2015.
12 May 2015, 11:06 AM ET
An inflatable drone could cruise the sulfurous skies of Venus next decade if Northrop Gruman can sell NASA on the mission.
11 May 2015, 07:21 AM ET
For years, tiny payloads have been launched into Earth orbit on satellites smaller than a loaf of bread.
11 May 2015, 07:01 AM ET
Small and economical "cubesats" already eye our planet from orbit. But such bantam craft are about to start pushing out into deep space, helping researchers study and explore the moon, asteroids and other distant bodies.
11 May 2015, 07:00 AM ET
The new ideas funded by the NASA Innovative Advanced Concepts (NIAC) program include a squid-like amphibious rover that could explore icy, ocean-harboring moons such as the Jupiter satellite Europa.
11 May 2015, 07:00 AM ET
The Internet has been abuzz recently with reports that a NASA research team has made significant progress toward developing a propellant-free thruster system. But space agency officials are downplaying the results.
10 May 2015, 09:05 AM ET
Russia's failed Progress 59 cargo spacecraft fell back to Earth, SpaceX's Dragon crew capsule launched on its first big test and the sun fired off its most powerful flare of 2015 so far. Here's a look at Space.com's top stories of the week.
08 May 2015, 06:26 PM ET
The U.S. Air Force’s Rapid Capabilities Office is scheduled to launch the fourth mission of the X-37B Orbital Test Vehicle (OTV) in May 2015.
08 May 2015, 08:57 AM ET
NASA’s Modular Robotic Vehicle (MRV), developed at the Johnson Space Center for eventual use off-world, could change how Earthly vehicles drive as well; ‘sideways’ on 4 independent wheel-motors, each of which can rotate 180°.
06 May 2015, 04:19 PM ET
Scientists at space agencies across the world are using satellite images and other technologies to aid those affected by Nepal's earthquake.
06 May 2015, 06:40 AM ET
Planetary Resources' Arkyd-3R probe currently sits aboard the International Space Station and is scheduled to be deployed into orbit sometime in July, representatives of the Washington-based asteroid-mining company have said.
05 May 2015, 07:00 AM ET
The new image was snapped from the deck of the drone ship on April 14, a second or so before the rocket stage toppled over and exploded in a dramatic demise that SpaceX captured on video.
04 May 2015, 03:55 PM ET
NASA has successfully tested electromagnetic propulsion in a hard vacuum for the first time.
04 May 2015, 01:31 PM ET
The creator of the Ansari Xprize winning SpaceShipOne shares how a couple of bicycle shop owners (Wright Brothers) inspired Space exploration, and how the Apollo program inspired private space sector growth.
04 May 2015, 10:46 AM ET
Space: the final frontier — for coffee. Italian astronaut Samantha Cristoforetti, dressed in a 'Star Trek' captain's uniform, became the first person in space to sip from a freshly-brewed cup of coffee, using the ISS's new espresso machine.
03 May 2015, 10:31 AM ET
A Russian cargo vessel suffered a serious malfunction on its way to the space station, NASA's MESSENGER probe slammed into Mercury and the New Horizons spacecraft snapped the best-ever photos of Pluto. Here's a look at Space.com's top stories of the week.
02 May 2015, 02:21 PM ET
From a spacecraft spinning out of control to predicting a cosmic demise, don't miss these amazing space images of the week for May 3, 2015.
01 May 2015, 03:07 PM ET
The private spaceflight company SpaceX will launch a pad abort test on May 6, 2015 to test the launch escape system on its manned Dragon spaceship. See the mission in photos here.
01 May 2015, 12:00 PM ET
The U.S. Air Force will test an innovative spacecraft thruster this month when it launches the latest mystery mission of its robotic X-37B space plane. Liftoff is set for May 20, 2015.
01 May 2015, 06:00 AM ET
Johann-Dietrich Wörner expressed his enthusiasm for a moon colony at the Space Foundation's National Space Symposium, a gathering of global, commercial, civil, military and "new space" experts that was held here from April 13 to April 16.
30 April 2015, 10:33 AM ET
The private spaceflight company Blue Origin launched a surprise test of its suborbital New Shepard spaceship on Wednesday (April 29) , a flight that successfully demonstrated the space capsule but failed to recover its reusable rocket booster.
30 April 2015, 07:00 AM ET
The International Space Station could one day get armed with a laser to shoot down space debris. This concept could eventually lead to a laser-firing satellite that could get rid of most of the most troublesome space junk orbiting Earth.