17 July 2015, 11:00 AM ET
When cosmic bullies collide with galactic dwarfs, the big guy comes out on top. A new study shows that star formation is halted in smaller galaxies that collide with large ones.
17 July 2015, 07:00 AM ET
The new images, which New Horizons captured during its historic flyby of Pluto on Tuesday (July 14), will be released in concert with a news conference that starts today at 1 p.m. EDT. You can follow it live here on Space.com, courtesy of NASA TV.
17 July 2015, 06:00 AM ET
NASA's Juno probe is now less than one year away from its rendezvous with Jupiter. Juno, which launched in August 2011, is scheduled to slip into orbit around the gas giant on July 4, 2016.
16 July 2015, 05:05 PM ET
As NASA's New Horizons flew past Pluto on July 14, it had aboard some of the ashes of the astronomer who discovered the planet in 1930. Now, the mission team has further honored the late Clyde Tombaugh by giving Pluto's heart-shaped region his name.
16 July 2015, 02:39 PM ET
A newly released Charon photo, which was taken by NASA's New Horizons probe during its epic Pluto flyby Tuesday (July 14), reveals a mountain rising out of a big hole on the 750-mile-wide (1,200 kilometers) moon's surface.
16 July 2015, 01:10 PM ET
After more than two weeks of silence, the European Philae lander on the surface of a comet phoned home once again this month in a long-distance call routed through its Rosetta mothership.
16 July 2015, 08:38 AM ET
New Late Night host Stephen Colbert tested just how far Neil deGrasse Tyson would go to deny Pluto's status as a planet in an online interview.
16 July 2015, 08:35 AM ET
A planet remarkably like Jupiter, orbiting a star remarkably like our sun, may have been found by scientists, who say the system could have more planets like our own.
16 July 2015, 08:26 AM ET
NASA's Mars rover Curiosity has detected Red Planet rocks similar to Earth's oldest continental crust. The discovery suggests that ancient Mars may have been more similar to ancient Earth than previously thought, researchers said.
16 July 2015, 07:00 AM ET
New photos by NASA's New Horizons spacecraft show that both the dwarf planet and its biggest moon, Charon, have been geologically active in the recent past. Scientists aren't sure what processes have powered this surprising activity.
15 July 2015, 09:44 PM ET
President Barack Obama fired off a congratulatory tweet Tuesday (July 14) celebrating the first-ever flyby of Pluto, which NASA's New Horizons spacecraft performed earlier that day.
15 July 2015, 08:03 PM ET
The newest images of Pluto and its moons, taken by NASA's New Horizons probe, revealed mountains that compete with the Rockies, chasms that dwarf the Grand Canyon and swarms of other mysteries to investigate.
15 July 2015, 06:00 PM ET
NASA has just funded seven far-out space-exploration concepts, including a submarine that would explore the hydrocarbon seas of Saturn's huge moon Titan, an origami energy reflector and rapid space transit with an electric sail.
15 July 2015, 05:51 PM ET
Starting with Clyde Tombaugh in 1930 and ending with New Horizons most recently released photo, its been an incredible journey to the far reaching icy dwarf. A complete list of sources for each image can be found on NASA.gov.
15 July 2015, 05:37 PM ET
The first close-up photo of Pluto revealed a mountain range rising 11,000 feet (3,500 meters) into Pluto's sky, along with a surface just 100 million years old at the most. A view of the dwarf planet's big moon Charon didn't disappoint, either.
15 July 2015, 04:07 PM ET
Some of the best images of Pluto and Charon were captured between July 11-July 14th, 2015 and have been revealed to the world. The closest approach images of July 14 show stunningly diverse worlds.
15 July 2015, 03:35 PM ET
NASA unveiled the first image from New Horizons' closest approach to the icy dwarf and Charon at a press conference on July 15th, 2015.
15 July 2015, 12:12 PM ET
The star HP 11915 is similar in mass and age to our Sun. Now a Jupiter-like world has been found orbiting it. The distance between this planet and its star is roughly the same as that between Jupiter and the Sun.
15 July 2015, 11:00 AM ET
Bold colors run like currents of water in a new map from Europe's Planck satellite, revealing the Milky Way galaxy in microwaves.
15 July 2015, 10:40 AM ET
"Chasing Pluto," a production of PBS' NOVA science series, premieres tonight at 9 p.m. EDT/8 p.m. CDT. The documentary provides an in-depth, behind-the-scenes look at the New Horizons mission and its flyby of the dwarf planet.
15 July 2015, 07:15 AM ET
NASA's New Horizons probe performed the first-ever close flyby of Pluto early yesterday morning (July 14). Here's what scientists, government officials and other interested parties had to say about the historic event.
15 July 2015, 07:10 AM ET
This morning, NASA's New Horizons probe will beam home the first haul of photos collected during Tuesday morning's Pluto flyby. NASA plans to unveil some of the best images during a news conference today at 3 p.m. EDT; watch it live on Space.com.
14 July 2015, 09:05 PM ET
NASA's New Horizons spacecraft has sent a status update home to its handlers here on Earth, indicating that the probe survived its historic encounter with Pluto this morning (July 14) — and that reams of amazing data should be on the way soon.
14 July 2015, 08:16 PM ET
He calls himself an "accessory" to the demotion of Pluto in an interview with NBC News' Lester Holt. Tyson uses Pluto's mass and its orbit crossing with that of Neptune as two major sticking point for classifying it as a dwarf planet.
14 July 2015, 07:26 PM ET
Guitar legend Joe Satriani shares a new track, and his thoughts on Pluto, with Space.com.
14 July 2015, 05:26 PM ET
NASA's New Horizons spacecraft performed the first-ever close flyby of Pluto this morning (July 14). Space.com managing editor Tariq Malik tells us what it was like to be at mission control for the historic moment.
14 July 2015, 05:00 PM ET
The surfaces of Pluto and Charon don't actually look like the inside of a kaleidoscope, but colorful new images reveal materials on the surface and give hints at the history of these two far-out objects.
14 July 2015, 04:06 PM ET
As NASA's New Horizons team members wait in anticipation for the spacecraft to send home its highly anticipated close-approach images of Pluto, they'll be making sure not to jinx the mission.
14 July 2015, 04:01 PM ET
Pluto, Charon, and other large objects in the outer reaches of the solar system could boast icy plumes, and NASA's New Horizons mission could find them.
14 July 2015, 02:47 PM ET
From one icon of science to another: in a video message posted this morning (July 14), physicist Stephen Hawking congratulated the New Horizons team on the spacecraft's flyby of Pluto.
14 July 2015, 01:16 PM ET
Science and distance conspire to create a long silence from NASA's New Horizons spacecraft, which flew by Pluto this morning (July 14).