23 September 2014, 07:00 AM ET
See images of the ringed planet from NASA's Cassini spacecraft in orbit around Saturn.
22 September 2014, 08:23 PM ET
The 2014 Astrophysics Kavli Prize Laureates tell the story behind their theory of cosmic inflation, and contemplate how it has changed our view of the universe.
22 September 2014, 03:43 PM ET
Audience members voted to restore Pluto's planethood during an event held last week organized by the Harvard-Smithsonian Center for Astrophysics.
22 September 2014, 03:00 PM ET
A new European prototype telescope inspired by an insect's eye could help protect Earth from dangerous asteroids when it is expected to come online next year.
22 September 2014, 02:01 PM ET
A probe flying through deep space has been beaming back amazing photos and information about its target comet since arriving at the cosmic body in August.
22 September 2014, 12:43 PM ET
Since it was awoken from deep space hibernation, the ESA mission has been collecting scientific data on Comet 67P/Churyumov-Gerasimenko. It has imaged dust streams emanating from the surface and captured grains with an on-board instrument.
22 September 2014, 11:25 AM ET
A solar flare is a light-speed traveling burst of x-rays and energy, while a coronal mass ejection (CME) is a giant cloud of particles emitted from the Sun. Both can affect the Earth in different ways and sometimes they happen together.
22 September 2014, 11:04 AM ET
During the atmospheric entry and landing phases of the Curiosity mission, hundreds of kilograms of mass was ejected. NASA is looking to change that 'dead weight' into scientific gain for future missions.
21 September 2014, 11:12 PM ET
What was your favorite space news story of the last week?
21 September 2014, 10:30 PM ET
After a 10-month journey through deep space, NASA's MAVEN probe arrived in Mars orbit late Sunday, on a mission to help determine why the Red Planet changed from a warm and wet place in the ancient past to the cold, arid world it is today.
21 September 2014, 07:30 AM ET
NASA's MAVEN spacecraft, which will study the atmosphere of Mars like never before, arrives at the Red Planet tonight (Sept. 21) and you can watch it live online. Watch the live webcast beginning at 9:30 p.m. ET (0130 GMT).
20 September 2014, 08:19 AM ET
After streaking through space at mind-numbing speeds for 10 months, NASA's MAVEN probe and India's Mars Orbiter Mission (MOM) spacecraft will have to slam on the brakes if they hope to be captured into orbit Sunday and Tuesday.
20 September 2014, 01:15 AM ET
The AMS particle detector aboard the International Space Station has found more evidence of dark matter in cosmic ray data.
19 September 2014, 08:53 PM ET
NASA's Mars Atmosphere and Volatile Evolution (MAVEN) mission will take measurements with its Neutral Gas and Ion Mass Spectrometer (NGIMS) that have never been collected before. Dr. James Garvin speaks to Space.com's @TariqJMalik about the mission.
19 September 2014, 11:39 AM ET
India's Mars Orbiter Mission marks the country's first mission to the Red Planet and first entry into interplanetary spaceflight. The unmanned Mars Orbiter Mission, or MOM, will map the surface of the Red Planet.
19 September 2014, 10:00 AM ET
The Chile-based Atacama Large Millimeter/submillimeter Array (ALMA) and other telescopes employed a sort of cosmic magnifying glass to look at details of a galaxy called H1429-0028, revealing that the object is actually two merging galaxies.
19 September 2014, 08:30 AM ET
The galaxy lies 11 billion light-years from Earth, so viewing it gives astronomers a glimpse into processes that occurred less than 3 billion years after the Big Bang that created the universe.
19 September 2014, 07:00 AM ET
Why do NASA and other space agencies keep sending robotic probes to Mars? Because the planet is close to Earth, may be able to support life and is a chief long-term target for human exploration.
19 September 2014, 01:00 AM ET
In what some call an act of cosmic cannibalism, the Andromeda galaxy will devour our Milky Way in about 5 billion years.
18 September 2014, 03:29 PM ET
SpaceX is due to bring some strange things to the space station this weekend: the first 3D printer to leave the plant, a batch of mutant fruit flies, a wind-watching radar, 20 mice and a mouse X-ray machine.
18 September 2014, 01:39 PM ET
The gas giant WASP-18b, 10X larger that Jupiter, orbits its relatively young parent star in just 23 hours. With the planet that close, the star’s magnetic field may be damped so much it is emitting x-rays at old age star rates.
18 September 2014, 10:42 AM ET
Volcanic eruptions can dramatically deepen the hue of lunar eclipses. But even with recent activity around the Pacific, the Oct 8th, 2014 passing of Earth's shadow is expected to be a normal coppery red.
18 September 2014, 06:00 AM ET
NASA's MAVEN probe is slated to arrive at the Red Planet around 9:50 p.m. EDT Sunday. The spacecraft's handlers are reporting no problems during the home stretch of its 10-month space journey.
18 September 2014, 06:00 AM ET
As the liquid on Titan interacts with the crust of the moon, changes in their composition could reveal processes from deep underground.
18 September 2014, 06:00 AM ET
Experts will debate different definitions of the term "planet" during a live webcast tonight at 7:30 p.m. EDT. Watch it live here on Space.com.
18 September 2014, 12:23 AM ET
This stunning space wallpaper from the VLT Survey Telescope at ESO’s Paranal Observatory in northern Chile shows the globular cluster Messier 54. This cluster looks very similar to many others, but it has a secret.
17 September 2014, 03:50 PM ET
The history of the Milky Way has a new wrinkle. Scientists used radio telescopes like the Atacama Large Millimeter/submillimeter Array — a vast array of receivers in Chile — used to probe galaxies within 40 million to 600 million light-years from Earth.
17 September 2014, 02:28 PM ET
In the 1998 movie 'Armageddon,' an asteroid the size of Texas threatens to collide with Earth in 18 days. Despite its entertainment value, the film is fantastically inaccurate, astronomer Phil Plait said.
17 September 2014, 01:18 PM ET
Astronomers have found that a small, nearby galaxy may harbor a giant secret — a supermassive black hole at its heart equal in mass to about 21 million suns.
17 September 2014, 01:00 PM ET
M60-UCD1 is five hundred times smaller than our Milky Way Galaxy, yet its core contains a singularity 5 times larger. This black hole comprises 15% of the little galaxy’s total mass of about 140 million Suns.
17 September 2014, 12:05 AM ET
The Wide Field Imager (WFI) on the MPG/ESO 2.2-metre telescope at the La Silla Observatory in Chile captured this space wallpaper of dark cloud Lupus 4 blotting out background stars.
16 September 2014, 09:00 PM ET
Gravitational forces interact during the the merger to form a disc. Red = Gas moving away from Earth, Blue = Gas approaching Earth.