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16 April 2015, 02:01 PM ET
The largest ancient galaxies stopped forming stars in their cores about three billion years after the Big Bang, with this end of star birth spreading from the inside out in so-called 'dead' galaxies, scientists say.
16 April 2015, 01:51 PM ET
NASA astronaut John Grunsfeld (now Associate Admin. for the Science Mission Directorate) looks back at how Hubble’s upgradable design can help us create more powerful space-based observatories.
16 April 2015, 01:35 PM ET
A statue honoring astronaut Sally Ride, the first American woman in space, could one day stand in the U.S. Capitol, if a California lawmaker's resolution continues to advance. The statue would replace the monument for a controversial Spanish missionary.
16 April 2015, 07:30 AM ET
Billionaire Paul Allen has formed a new company to help make spaceflight more affordable and efficient. Vulcan Aerospace, which was unveiled Monday, will spearhead the space projects of Vulcan, Inc.
16 April 2015, 07:30 AM ET
A NASA telescope co-discovered one of the most distant planets ever discovered, a gas giant about 13,000 light-years away from Earth.
15 April 2015, 05:55 PM ET
It's now time to start planning out a future space telescope that will tackle the next big frontier in astronomy and astrophysics, researcher Mario Livio says — the search for signs of life beyond our neck of the cosmic woods.
15 April 2015, 05:47 PM ET
A new video shows the first stage of SpaceX's Falcon 9 rocket crashing and burning after nearly pulling off an unprecedented touchdown on an unmanned "drone ship" in the Atlantic Ocean.
15 April 2015, 05:28 PM ET
It appears that dark matter — the mysterious stuff that makes up most of the matter in the universe — may be able to interact with other bits of dark matter, and not just through the pull of gravity.
15 April 2015, 04:41 PM ET
The second attempted ocean barge landing of the first stage of the SpaceX rocket touched down on the barge but a little too hard. The rocket successfully launched the Dragon cargo ship to the Space Station.
15 April 2015, 01:45 PM ET
NASA astronaut Terry Virts took a GoPro camera with him on an Extra Vehicular Activity (EVA) outside the International Space Station on February 25th, 2015.
15 April 2015, 01:01 PM ET
A key ingredient of the early Earth may have been a chunk of rock much like Mercury, scientists say. This finding could help explain how Earth's magnetic field has lasted for billions of years, researchers added.
15 April 2015, 11:37 AM ET
The world looks different to Neil deGrasse Tyson because he’s an astrophysicist. When a great communicator gets his hands on an elegant tool, enlightenment (and, yeah, a little ego) ensues. But why did @NeilTyson choose Twitter? He tells Space.com.
15 April 2015, 07:40 AM ET
Strange bright spots on the surface of the Ceres continue to mystify scientists even as NASA's Dawn spacecraft is beaming the best maps yet of the dwarf planet in the asteroid belt.
15 April 2015, 07:16 AM ET
NASA's New Horizons mission to Pluto has returned its first color image of the dwarf planet and its largest moon, Charon. The new photo was taken on April 9, from a distance of about 71 million miles (115 million kilometers).
15 April 2015, 07:00 AM ET
A stunning new video taken by a chase plane shows just how close SpaceX came to pulling off a historic rocket landing Tuesday (April 14) during the launch of its Dragon cargo capsule toward the International Space Station.
14 April 2015, 07:21 PM ET
Skywatchers across parts of the United States and southern Canada have a chance to see a Dragon capsule built by the private spaceflight company SpaceX 'chase' the International Space Station across the sky this week ahead of a Friday morning rendezvous.
14 April 2015, 04:44 PM ET
Through 25 years on-orbit, the Space Telescope has repeatedly changed our understanding of the Universe. Astronaut John M. Grunsfeld, now NASA's Associate Administrator Science Mission Directorate, illuminates why we love this instrument.
14 April 2015, 04:30 PM ET
SpaceX's Falcon 9 rocket launched the company's Dragon cargo capsule toward the International Space Station today (April 14) and then returned to Earth, nearly pulling off an unprecedented landing on a floating platform in the Atlantic Ocean.
14 April 2015, 04:16 PM ET
Atop a Falcon 9 booster, SpaceX’s Dragon cargo spacecraft – loaded with 4,000+ lbs of supplies and experiments – was launched from the Cape Canaveral Air Force Station in Florida on April 14th, 2015.
14 April 2015, 02:03 PM ET
The heat is on the for the Comet 67P/ Churyumov-Gerasimenko as it sails ever closer to the sun, with the European Rosetta spacecraft snapping a stunning set of photos that the buzzing activity of the icy wanderer.
14 April 2015, 12:53 PM ET
NASA is celebrating the 25th anniversary of the Hubble Space Telescope this week, and will broadcast celebration events on Thursday (April 23) and Friday (April 24) morning.
14 April 2015, 10:48 AM ET
The International Space Station's cupola provides astronauts with stunning views of Earth and the cosmos. ESA astronaut Alexander Gerst can be seen within, as the exterior ballet of window covers proceeded.
14 April 2015, 09:55 AM ET
Ground-based and Hubble images of Pluto suggest it might be the reddest object in the Solar System. New Horizons' Principal Investigator Alan Stern explains how this could have happened.
14 April 2015, 06:50 AM ET
Taxes are going to play a big role in a Mars mission, both in getting there and upon arrival, one expert says.
14 April 2015, 06:47 AM ET
The dark universe is coming into view, thanks to new maps that chart the location dark matter in the cosmos. The new maps, released today, show how dark matter affects the landscape of regular matter, and provides hints about dark energy.
14 April 2015, 06:47 AM ET
United Launch Alliance (ULA), the company behind the Atlas and Delta rockets, unveiled Vulcan, its new launch vehicle system. The Vulcan rocket features new engines and a plan for reuse that involves mid-air recovery.
13 April 2015, 10:01 PM ET
Astrophotographer Miguel Claro took this image between the Giant’s Causeway, near Bushmills, in northeast coast of Northen Ireland on March 20, 2015.
13 April 2015, 05:20 PM ET
United Launch Alliance, a cooperative launch service by Lockheed Martin and Boeing, unveiled its Next-Generation Launch Vehicle, on April 13, 2015. ULA Vulcan can be more cost-competitive with SpaceX and other launch providers.
13 April 2015, 04:53 PM ET
A wormhole is a theoretical passage through space-time that could create shortcuts for long journeys across the universe.
13 April 2015, 04:35 PM ET
The private spaceflight company SpaceX called off the launch of a Dragon spaceship and an ambitious rocket landing try on Monday (April 13) due to bad weather conditions. SpaceX hopes to try again on Tuesday, April 14, at 4:10 p.m. EDT.
13 April 2015, 03:27 PM ET
Rare tropical methane storms could help solve the mystery of how strange, giant dunes form on Titan, Saturn's largest moon, researchers say.
13 April 2015, 02:26 PM ET
Giant storms on Saturn known as 'Great White Spots' may be caused by moisture in the planet's atmosphere, researchers say.