The new UV surveys are the most detailed ever of the Large and Small Magellanic Clouds, the Milky Way's closest neighbor galaxies.
NASA's Swift X-ray Telescope has observed a spinning, crushed core of a massive star suddenly slowing down.
A record-setting blast of gamma rays from a dying star in a distant galaxy has wowed astronomers around the world.
Three unusually long-lasting stellar explosions discovered by NASA's Swift satellite represent a new class of gamma-ray bursts that likely arise from dying stars hundreds of times larger than the sun.
The Swift satellite observed a comet that may become one of the most dazzling seen in decades when it rounds the sun later this year.
NASA's Swift satellite has uncovered the previously unknown remains of a shattered star which ranks among the youngest-known supernova remnants in our Milky Way galaxy.
The Swift team has selected more than 100 images to help celebrate eight years of operations of the satellite's Ultraviolet/Optical Telescope.
High-speed jets launched from active black holes possess fundamental similarities regardless of mass, age or environment, a new study finds.
A new X-ray source in the Andromeda galaxy is the first detection of radio-emitting jets from a stellar-mass black hole outside the Milky Way.
An enormous binary star pair some 4,700 light-years away pounds its surroundings with intense outflows called stellar winds.
Swift recently detected the presence of a previously unknown stellar-mass black hole.
Researchers have observed a distinctive X-ray signal following a black hole's eruption that comes from matter on the verge of falling into it.
Astronomers have made an unparalleled observation: significant changes in the atmosphere of a planet located beyond our solar system.
The Committee on Space Research recently announced an award to NASA Astrophysicist Neil Gehrels for research in space science.
Outbound comet C/2009 P1 (Garradd) provided a nice show for skywatchers last year. Now, it's the target of an ongoing investigation.
Studies using X-ray and ultraviolet observations from NASA's Swift satellite are providing new insights into the elusive origins of an important class of exploding star, called Type Ia supernovas.
Researchers using multiple NASA space observatories have been studying an object known as an ultraluminous X-ray source in the neighboring Andromeda galaxy.
A peculiar cosmic explosion seen by the Swift observatory on Christmas Day 2010 was either a novel type of supernova located billions of light-years away or an unusual collision much closer to home
As asteroid 2005 YU55 swept past Earth in the early morning hours of Wednesday, Nov. 9, 2011, Swift monitored the fast-moving space rock.
Two studies in the Aug. 25 issue of Nature provide new insights into a cosmic accident that has been streaming X-rays toward Earth.
Swift discovered a series of powerful X-ray blasts coming from a source in the constellation Draco.
NASA satellites have found a second super-sized black hole at the heart of an unusual nearby galaxy already known to be sporting one.
After two years of painstaking analysis, astronomers say a stellar blast observed by Swift was the farthest explosion yet identified.
On Dec. 11, 2010,asteroid Scheila flared twice as bright as expected. Hubble and Swift captured the aftermath of this deep space collision.
A new supercomputer simulation gives the most detailed view of the forces driving some of the universe's most energetic explosions.
Usually, gamma-ray bursts last hours, marking the destruction of a massive star, but three telescopes have now zoomed in on one lasting for days.
An international team of scientists using data from NASA's Swift satellite confirms the existence of a largely unseen population of black-hole-powered galaxies.
Swift primarily studies gamma-ray bursts, the biggest and most mysterious explosions in the cosmos. On April 13, Swift's "burst-o-meter" cataloged its 500th GRB.
Astronomers have found evidence that two supernovae blasts received an extra boost from newborn black holes.
A specialized camera on a telescope operated by U.K. astronomers from Liverpool has made the first measurement of magnetic fields in the afterglow of a gamma-ray burst (GRB).
Astronomers at NASA's Goddard Space Flight Center find that an X-ray source in galaxy NGC 5408 represents one of the best cases for a middleweight black hole to date.
In a break from its usual task of searching for distant cosmic explosions, NASA's Swift satellite has acquired the highest-resolution view of a neighboring spiral galaxy ever attained in the ultraviolet.
NASA's Swift satellite detected a rare interstellar object known as a soft gamma repeater, or SGR. The object is only the fifth confirmed SGR.
NASA's Swift satellite and an international team of astronomers have found a gamma-ray burst from a star that died when the universe was only 630 million years old.
A montage of comet images made using NASA’s Swift spacecraft illustrates just how different three comets can be.
While waiting for high-energy outbursts and cosmic explosions, NASA's Swift Gamma-ray Explorer satellite is monitoring Comet Lulin as it closes on Earth.
Astronomers using NASA's Swift satellite and Fermi Gamma-ray Space Telescope are seeing frequent blasts from a stellar remnant 30,000 light-years away.
Astronomers have, for the first time, identified gas molecules in the host galaxy of a gamma-ray burst.
An ongoing X-ray survey undertaken by NASA's Swift spacecraft is revealing differences between nearby active galaxies and those located about halfway across the universe.
Swift caught sight of a splintered comet fragment as it passed by the Ring Nebula.
Astronomers are reporting on a strange case where one of the littlest of stars "twinkled" with gamma rays, X-rays, and light -- and then vanished.
NASA will hold a media teleconference Wednesday, September 10, at 1 p.m. EDT to discuss new results regarding the naked-eye gamma-ray burst, the brightest seen to date.
NASA's Swift satellite has found the most distant gamma-ray burst ever detected. The blast arose from a star 12.8 billion light-years away.
Thanks to NASA's Swift satellite, astronomers have seen a star actually blow up.
On April 25, NASA’s Swift satellite picked up a record-setting flare from a star known as EV Lacertae.
In just the past six weeks, two supernovae have flared up in an obscure galaxy in the constellation Hercules.
Scientists recently made a discovery that forced them to re-think their theories on the most powerful explosions in the cosmos - gamma ray bursts.
Scientists using NASA's Swift satellite stumbled upon a rare sight, two supernovae side by side in one galaxy.
Monster flare was perhaps the most energetic magnetic stellar explosion ever detected.
This new cosmic explosion which appears to be a precursor to a supernova will achieve peak brightness within a week.
Scientists have detected a flash of light brighter than anything ever detected from beyond our Solar System.
The Swift satellite will be able to detect and study the black hole/gamma ray burst connection.
Swift's trio of telescopes see gamma-ray bursts like never before.
Catching gamma-ray bursts is harder than bottling lighting.
NASA's Swift spacecraft brings you an unpredictable universal event in real time.
Data from a powerful gamma-ray burst may tell us more about a mysterious type of black hole.
A superb launch and flawless liftoff for NASA's Swift spacecraft to study the mystery of gamma-ray bursts.› View This Video
John Honig, Swift launch site integration manager, describes spacecraft transporation and preparation process.› View This Video
Ancient gamma-ray bursts could mark the birth of black holes or death of stars.› View This Video
Goddard Space Flight Center is NASA's home for the development of unmanned spacecraft.› View This Video
Preparing to unravel the mystery of Gamma-ray bursts.› View This Video
See images and videos of the Swift spacecraft as it is prepared for launch.
Images of Swift, gamma-ray bursts and more, provided by Goddard Space Flight Center.