08 April 2015, 01:45 PM ET
Flying twice the speed of a Space Shuttle, a collision with cosmic debris could be catastrophic. Flying twice the speed of a Space Shuttle, a collision with cosmic debris could be catastrophic.
07 April 2015, 07:00 AM ET
The deadline for the "Our Pluto" naming campaign — a collaboration involving NASA, the International Astronomical Union (IAU) and the SETI (Search for Extraterrestrial Intelligence) Institute — has been extended to April 24.
06 April 2015, 02:22 PM ET
Thanks to instruments on board NASA's New Horizon's spacecraft, which will fly by Pluto this summer, scientists are able to get an unprecedented look at the space weather near the dwarf planet.
31 March 2015, 12:45 PM ET
Much is unknown about Pluto, including what its surface features are like and what kind of weather patterns it has, if any.
30 March 2015, 07:00 AM ET
Scientists are considering further targets for NASA's New Horizons spacecraft to visit following its Pluto encounter this summer, should funding be provided.
24 March 2015, 02:32 PM ET
NASA's New Horizons' principal investigator Dr. Alan Stern talks to Space.com about the importance of the mission to the "wild west" of our solar system, a place where no other probe has been.
24 March 2015, 07:38 AM ET
Researchers working on NASA's New Horizons mission, which will zoom through the Pluto system on July 14, are asking the public to propose and vote on names for geological features the probe will identify on Pluto and its largest moon, Charon.
15 March 2015, 11:29 AM ET
NASA launched a new space-weather mission and scientists found evidence of a hydrothermal system on Saturn's ocean-bearing moon Enceladus. Here's a look at Space.com's top stories of the week.
12 March 2015, 07:33 AM ET
New Horizons, which will zoom through the Pluto system on July 14, fired its engines for 93 seconds on Tuesday (March 10), when it was about 3 billion miles from Earth — the most distant engine burn ever, mission officials said.
10 March 2015, 03:42 PM ET
Even 100,000 million miles away, NASA’s New Horizons probe has begun delivering unprecedented views. The mission's principal investigator Dr. Alan Stern tells Space.com just how much better the imagery will be.
08 March 2015, 12:48 PM ET
A powerful camera spotted a comet and scientists captured images of a supernova four different times. Here are Space.com's pics for the top space stories of the week.
06 March 2015, 10:20 PM ET
These two events will make 2015 an exciting year for solar system exploration and discovery. But there is much more to this story than mere science.
27 February 2015, 07:00 AM ET
Inside New Horizons is a small piece of SpaceShipOne, the first privately owned and operated spacecraft to reach space twice within a period of 14 days. The feat, which SpaceShipOne accomplished in 2004, won the $10 million Ansari X Prize.
25 February 2015, 11:38 AM ET
2015 an exciting year for solar system exploration and discovery.
21 February 2015, 04:46 PM ET
Europe's last cargo spacecraft came down to Earth in a fiery blaze and scientists reported seeing mysterious plumes emanating from Mars. Here are Space.com's picks for the best space stories of the week.
21 February 2015, 12:42 PM ET
From mysterious plumes on Mars to a space station made of matchsticks, don't miss these amazing space images of the week for Feb. 22, 2015.
19 February 2015, 07:00 AM ET
NASA's New Horizons spacecraft captured images of Nix and Hydra, two of Pluto's five known moons, from Jan. 27 through Feb. 8, at distances ranging from 125 million miles to 115 million miles (201 million to 186 million kilometers).
12 February 2015, 04:05 PM ET
The new Pluto-Charon video was shot by NASA's New Horizons probe from Jan. 25 to Jan. 31, as the spacecraft gears up for its epic Pluto encounter this July.
12 February 2015, 02:04 PM ET
NASA's New Horizon probe watched Charon and Pluto orbit a common center of mass that lies outside either body. Each full revolution takes 6.4 Earth days. The first image was snapped 126 million miles out; the last was ~5 million miles closer.
04 February 2015, 05:54 PM ET
NASA's New Horizons probe has captured new photos — which show Pluto and its largest moon, Charon — with its telescopic camera on Jan. 25 and Jan. 27, when the probe was about 126 million miles (203 million kilometers) from the Pluto system.
27 January 2015, 09:51 PM ET
The New Horizons spacecraft is expected to reach the dwarf planet Pluto in 2015
26 January 2015, 07:00 AM ET
Alan Stern, principal investigator of NASA's New Horizons mission to Pluto, talks to Space.com about the probe's July 14 flyby of the dwarf planet.
16 January 2015, 02:20 PM ET
At least two planets larger than Earth likely lurk in the dark depths of space far beyond Pluto, just waiting to be discovered, a new analysis of the orbits of "extreme trans-Neptunian objects" (ETNOs) suggests.
15 January 2015, 07:41 PM ET
The NASA probe launched in January 2005 and will encounter Pluto in the summer of 2015.
15 January 2015, 07:00 AM ET
NASA's New Horizons probe today (Jan. 15) began its six-month approach to Pluto, which will culminate with the first-ever close flyby of the dwarf planet on July 14.
06 December 2014, 08:00 AM ET
The New Horizons probe is coming out of hibernation for the last time as it approaches the dwarf planet Pluto and the icy depths of our solar system.
18 November 2014, 11:20 AM ET
New Horizons is scheduled to emerge from a 99-day hibernation on Dec. 6, then gear up for a six-month Pluto encounter that peaks with the first-ever close flyby of the mysterious dwarf planet on July 14, 2015.
15 October 2014, 02:43 PM ET
Hubble has spotted three objects that the New Horizons probe could potentially visit after completing its Pluto flyby in July 2015. One of these newly identified bodies is definitely reachable, while the other two require further study.
13 October 2014, 12:38 AM ET
NASA's Hubble Space Telescope has spotted a few objects that the New Horizons probe might be able to explore after it zooms past the Pluto system during a highly anticipated flyby on July 14, 2015.
23 September 2014, 10:49 AM ET
NASA's New Horizons spacecraft may still be 10 months from its historic flyby with dwarf planet Pluto, but it is making good use of its interplanetary cruise to get familiar with its flyby target by imaging Pluto's outermost moon Hydra
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.
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.
26 August 2014, 06:00 AM ET
NASA's Voyager 2 spacecraft made the first-ever flyby of Neptune on Aug. 25, 1989, zipping by the planet and its moon Triton in quick succession. The historic encounter gave a face to two worlds that until that time had dwelt in depth and shadow.
25 August 2014, 03:37 PM ET
New Horizons — which is scheduled to zoom through the Pluto system on July 14, 2015 — passed Neptune's orbit today, 25 years to the day after NASA's Voyager 2 probe executed the first-ever flyby of faraway Neptune and its icy moon Triton.
22 August 2014, 06:02 AM ET
The new map, made using photos taken by NASA's Voyager 2 probe in 1989, has also been turned into a movie reconstructing the spacecraft's historic Triton encounter — the only time a spacecraft has ever visited the Neptune system.
11 August 2014, 04:35 PM ET
The New Horizons probe used its onboard telescope to record a video of Charon orbiting Pluto. The movie is composed of 12 individual images taken July 19-24 — one year before the spacecraft's flyby of the distant dwarf planet.