13 July 2015, 06:00 AM ET
The New Horizons probe's flyby of Pluto on Tuesday (July 14) will wrap up the initial reconnaissance of the solar system, an endeavor that began more than 50 years ago.
13 July 2015, 06:00 AM ET
Pluto — the once (and to some people, forever) ninth planet of the solar system — gets a lot of love from the general public. What makes this icy outlier so loveable?
13 July 2015, 06:00 AM ET
On Tuesday morning (July 14) — nine and a half years after launching, and a quarter-century after its mission began to take shape — NASA's New Horizons probe will perform history's first flyby of Pluto.
12 July 2015, 10:48 PM ET
Since recovering from a July 4th, 2015 glitch, New Horizons' has sent back some incredible imagery which highlight possible craters, cliffs and chasms on the icy dwarf and its moon.
12 July 2015, 10:38 PM ET
NASA's New Horizons spacecraft has spotted multiple craters and canyons on Pluto's big moon Charon, including one chasm that appears to be longer and deeper than Arizona's Grand Canyon, mission team members said.
12 July 2015, 09:00 AM ET
A history of attempts to study Pluto over the last 100 years, from its role as the mysterious "Planet X" to its upcoming New Horizons close-up.
12 July 2015, 02:47 AM ET
NASA's New Horizons probe captured amazing images of Pluto, scientists revealed details about a proposed superpowerful space telescope and NASA announced its first four commercial-crew astronauts. Here are Space.com's top stories of the week.
12 July 2015, 02:43 AM ET
New Horizons imaged the patches on Saturday (July 11), from a distance of 2.5 million miles (4 million kilometers). Charon. New Horizons won't be able to see the dark spots when it zooms through the Pluto system on July 14.
11 July 2015, 01:14 PM ET
A new image, which NASA's New Horizons probe took Thursday (July 9) from a distance of 3.3 million miles (5.4 million kilometers), reveals polygonal features and a 1,000-mile-long (1,600 km) band of patterned, dark-and-light terrain.
11 July 2015, 01:16 AM ET
From gorgeous views of Pluto and its largest moon Charon to an amazing shot of the International Space Station crossing the moon's face, don't miss these amazing space images.
10 July 2015, 02:47 PM ET
The new images — which were taken Wednesday from a distance of 3.7 million miles — show that Pluto and Charon are very different bodies, though they circle a common center of gravity and are separated by a mere 12,200 miles, NASA officials said.
10 July 2015, 04:45 AM ET
In recent years, planetary scientists have begun to suggest that Pluto and its moons might serve as an analogue to planets orbiting double star systems — like the fictional planet Tatooine, home of Luke Skywalker.
09 July 2015, 11:01 AM ET
Pluto may only be the beginning of NASA New Horizons' exploration of the Edgeworth-Kuiper Belt.
09 July 2015, 07:00 AM ET
The New Horizons probe careening toward Pluto has officially begun its sequence of science observations for its closest approach of the dwarf planet, on July 14.
09 July 2015, 07:00 AM ET
NASA has released a video called "The Wait" to call further attention to the New Horizons spacecraft's epic flyby of Pluto on July 14.
08 July 2015, 08:00 PM ET
Though the New Horizons spacecraft's Pluto flyby doesn't occur until July 14, great images from the probe are already rolling in. Here, Space.com highlights some of New Horizons' best Pluto pics from the close encounter's home stretch.
08 July 2015, 05:23 PM ET
"Mission Pluto" will air on National Geographic Channel on July 14. That very morning, New Horizons will cruise within 7,800 miles (12,500 kilometers) of Pluto's surface, returning history's first up-close looks at the faraway world.
08 July 2015, 04:43 PM ET
Does Pluto really have baby snowflakes and ice volcanoes? New Horizons team members weigh in.
08 July 2015, 02:24 PM ET
A new image taken by New Horizons yesterday (July 7), when the probe was less than 5 million miles (8 million kilometers) from Pluto, shows a large, heart-shaped feature on the dwarf planet's surface.
08 July 2015, 07:01 AM ET
In anticipation of the New Horizons flyby of Pluto on July 14, this sky chart can help you find Pluto in the night sky (with the assistance of a high power telescope).
07 July 2015, 05:09 PM ET
New Horizons team members submitted the names generated by the "Our Pluto" campaign to the International Astronomical Union (IAU) today (July 7), one week before the probe makes history's first flyby of the faraway dwarf planet.
07 July 2015, 03:18 PM ET
They are three words that, after next week, will never be used to describe Pluto again, and they are about to witness their own expiration: "Not yet explored." The phrase appears on a 1991 29-cent U.S. stamp flying on New Horizons.
07 July 2015, 07:30 AM ET
With less than nine days to go in its nine-year journey, NASA's New Horizons probe is set to take the first-ever up-close images of the dwarf planet Pluto. And as those images are received on Earth, they are set to air on the Science Channel.
06 July 2015, 05:47 PM ET
The images, which New Horizons captured Wednesday (July 1) and Friday (July 3), reveal a great deal of variation and complexity across Pluto's surface — including four large dark patches near the equator whose origin and composition remain mysterious.
06 July 2015, 04:42 PM ET
Nearly 30 observations were lost due to a glitch during a system update on July 4th, 2015. NASA principal investigator Alan Stern lists the data that will not be retrieved from July 4th until July 7th.
06 July 2015, 10:21 AM ET
Black and white imagery from the NASA probe's LORRI instrument is combined with color data from the Ralph instrument to create the first color time-lapse of the Pluto-Charon orbital "dance". Also, the New Horizons team released an artist impression
06 July 2015, 01:33 AM ET
New Horizons' handlers say the probe should be back to normal science operations by Tuesday (July 7), exactly one week before it performs the first-ever flyby of Pluto.
05 July 2015, 04:37 AM ET
The probe's handlers lost contact with New Horizons at 1:54 p.m. EDT (1754 GMT) Saturday (July 4) but were able to restore communications at 3:15 p.m. EDT (1915 GMT).
02 July 2015, 04:12 PM ET
The constellation Sagittarius looks like a teapot and will be spew Milky Way 'steam' (aka center of our galaxy) this month. The area is frothy with nebulae, star clusters and, if you have a really good telescope, Pluto.
02 July 2015, 12:48 PM ET
The rock band Styx toured the control center for NASA's New Horizons mission to Pluto, and learned more about Pluto's smallest moon, also named Styx.
02 July 2015, 10:54 AM ET
The latest New Horizons' data pouring into NASA servers on Earth has returned color and black & white images of Pluto and Charon and more. The strange dark spots, seen in the approximate true color view, are oddly very similar.
02 July 2015, 07:30 AM ET
The New Horizons probe has spotted no signs of rings or additional moons in the Pluto system, so the spacecraft will remain on its original trajectory when it zooms past the dwarf planet on July 14, NASA officials announced Wednesday (July 2).
02 July 2015, 07:00 AM ET
With less than two weeks until its close encounter with Pluto, NASA's New Horizon's probe has detected methane ice on the surface of the dwarf planet. Methane was first discovered on Pluto in 1976.
01 July 2015, 11:15 AM ET
Imagery taken between 28 May and 25 June 2015 from NASA New Horizons' LORRI instrument reveals the best look yet of the icy double dwarf planet Pluto-Charon.
01 July 2015, 07:01 AM ET
NASA's New Horizons probe will cruise within 7,800 miles (12,500 kilometers) of Pluto's surface on July 14, capturing the first-ever good looks at the frigid, faraway and mysterious world.
30 June 2015, 05:07 PM ET
Pluto and its largest moon, Charon, posed for a solemn portrait taken by NASA's New Horizon's probe, which is only two weeks away from its close encounter with the dwarf planet.