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11 September 2015, 09:29 AM ET
How Solar Eclipses Work: When the moon covers up the sun, skywatchers delight in the opportunity to see a rare spectacle.
11 September 2015, 09:20 AM ET
The full moon happens once a month. Find out when.
11 September 2015, 08:45 AM ET
Find out the current moon phases. The moon cycles through eight phases every month.
11 September 2015, 06:00 AM ET
Mercury is a faster spinner than thought, completing a spin on its axis roughly 9 seconds more quickly than scientists previously charted — and that data will help scientists understand more about the planet's molten core.
11 September 2015, 05:48 AM ET
SpaceX has thrown open the hatch leading into its Crew Dragon spacecraft, revealing a sleek black and white interior design for the capsule it is building to fly astronauts to the International Space Station and other future destinations.
11 September 2015, 05:27 AM ET
An image released last fall sparked debate over whether or not giant planets might form so close to one another. New evidence suggests they can, making this the first image of planetary birth.
11 September 2015, 05:25 AM ET
Aerojet Rocketdyne has made an unsolicited bid to buy U.S. government launch services provider United Launch Alliance for $2 billion.
10 September 2015, 06:25 PM ET
SpaceX shows how its new human-rated spacecraft that will carry astronauts to the International Space Station will look in flight.
10 September 2015, 06:20 PM ET
SpaceX takes you on a quick tour of the interior of the the human-rated spacecraft that will carry astronauts to the International Space Station.
10 September 2015, 06:07 PM ET
New imagery from the NASA's New Horizons' mission has been processed. High detailed views of the Sputnik Planum and the Chaos region give you the perspective from 1,100 miles (1,800 kilometers) above Pluto’s equatorial area.
10 September 2015, 06:00 PM ET
An "over-the-top" complex mix of craters, ice flows, mountains, valleys and apparent dunes coexist in the latest images dispatched from the New Horizons spacecraft's flyby of Pluto.
10 September 2015, 04:44 PM ET
On Monday, Aug. 21, 2017, the United States will fall under the Moon shadow with huge swaths of the country viewing a total eclipse, while the rest is treated to a partial eclipse. Exact areas can be seen in these visualizations created by NASA.
10 September 2015, 03:13 PM ET
Texas-based Firefly Space Systems, which is developing rockets dedicated to getting small spacecraft aloft, has conducted a ground test of its Firefly Rocket Engine Research 1 (FRE-R1), company officials announced today (Sept. 10).
10 September 2015, 01:14 PM ET
A new infographic traces the evolution of video-game spaceships, from the simple dots and dashes of 1962's "Spacewar!" to the hyperrealistic Anaconda craft of "Elite: Dangerous" (2014).
10 September 2015, 12:24 PM ET
Elon Musk appeared on "The Late Show with Stephen Colbert," to talk about dropping nuclear bombs on Mars and a creepy new snake robot built to charge electric cars.
10 September 2015, 09:01 AM ET
A giant slab of ice as big as California and Texas put together lurks just beneath the surface of Mars between its equator and north pole, researchers say. This ice may be the result of snowfall tens of millions of years ago on the Red Planet.
10 September 2015, 09:00 AM ET
NASA's New Horizons probe found that Pluto's surface is reddish-brown, as is the north polar region of Charon, the dwarf planet's biggest moon. That's no coincidence: The red on both bodies is likely caused by complex compounds called tholins.
10 September 2015, 09:00 AM ET
The "Red Dragon" sample-return mission would grab samples collected by NASA's 2020 Mars rover and send them rocketing back toward Earth, where researchers could scrutinize the material for possible signs of past Red Planet life.
09 September 2015, 04:23 PM ET
A so-called "cosmic tsunami" is rousing a galaxy cluster affectionately nicknamed 'the Sausage,' suggesting that stagnant galaxies can see new life when galactic clusters collide, scientists say.
09 September 2015, 02:35 PM ET
NASA's sun-studying Solar Dynamics Observatory captured dramatic time-lapse video of a solar tornado that raged from Sept. 1 through Sept. 3. The temperature of spinning plasma reached 5 million degrees Fahrenheit (2.8 million degrees Celsius).
09 September 2015, 12:11 PM ET
Ice? Diamonds? Salt-lick for giant nocturnal astro-worms that follow the terminator around the dwarf planet so they're always in darkness (never photographed by NASA’s Dawn probe). NASA wants your guess...
09 September 2015, 11:49 AM ET
What is space-time, really?
09 September 2015, 11:00 AM ET
If you want to see an eye-catching celestial display involving a slender crescent moon and two bright planets, then be sure to set your alarm clock to wake you up an hour before sunrise on Thursday morning (Sept. 10).
09 September 2015, 10:12 AM ET
NASA's Solar Dynamics Observatory (SDO) watched the Sun’s magnetic forces twist and turn enormous plumes of superheated plasma from Sept. 1-3, 2015. The particles observed by SDO – mostly iron – were measured at a blazing 5 million degrees.
09 September 2015, 07:00 AM ET
The penguins are in luck, as are many southern skywatchers: A solar eclipse will be visible from Antarctica, southern Africa and the Indian Ocean on Sunday (Sept. 13).
09 September 2015, 07:00 AM ET
NASA's New Horizons spacecraft has begun beaming home tens of gigabits of data gathered during its historic July 14 flyby of Pluto. The entire flyby data set should be on the ground in about 12 months.
09 September 2015, 07:00 AM ET
The U.S. Air Force hopes to build an experimental satellite to detect nuclear explosions and monitor the space environment from geosynchronous orbit.
09 September 2015, 07:00 AM ET
Responding to Congressional criticism that it was giving SpaceX special treatment, NASA said it is doing an independent review of SpaceX’s launch failure.
08 September 2015, 07:31 PM ET
A lot of folks study the stars, but what's the point?
08 September 2015, 06:00 PM ET
A stunning video shows a breathtaking aurora light display captured from the International Space Station by astronaut Scott Kelly, who said it was like no other aurora he'd ever seen.
08 September 2015, 05:24 PM ET
If Scott Kelly were aboard a spaceship on its way to Mars, rather than on the International Space Station where has been for the last six months, he would be arriving at the Red Planet just about now.
08 September 2015, 04:03 PM ET
On Sept. 7th, 2015, European astronaut Andreas Mogensen – orbiting 240+ miles up and flying at 17,000+ mph – placed a peg in a hole on Earth; a demonstration of teleoperation using a force-feedback controlled machine system built by ESA.