Browse Archive
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Dying Supergiant Stars Implicated in Hours-long Gamma-Ray Bursts
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.
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NASA's Swift Sizes Up Comet ISON
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.
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NASA's Swift, Chandra Explore a Youthful 'Star Wreck'
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.
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An Image Gallery Gift from NASA's Swift
The Swift team has selected more than 100 images to help celebrate eight years of operations of the satellite's Ultraviolet/Optical Telescope.
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Study: Remarkable Symmetry in Black Hole Jets
High-speed jets launched from active black holes possess fundamental similarities regardless of mass, age or environment, a new study finds.
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Astronomers Catch Binging Black Hole's Jet
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.
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Colossal Binary's Clashing Winds
An enormous binary star pair some 4,700 light-years away pounds its surroundings with intense outflows called stellar winds.
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Swift Discovers a New Black Hole in our Galaxy
Swift recently detected the presence of a previously unknown stellar-mass black hole.
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Star's 'Cry' Heralds New Era for Testing Relativity
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.
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Hubble, Swift Detect First-Ever Changes in an Exoplanet Atmosphere
Astronomers have made an unparalleled observation: significant changes in the atmosphere of a planet located beyond our solar system.
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Committee on Space Research Honors NASA's Neil Gehrels for Science Contributions
The Committee on Space Research recently announced an award to NASA Astrophysicist Neil Gehrels for research in space science.
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NASA's Swift Monitors Departing Comet Garradd
Outbound comet C/2009 P1 (Garradd) provided a nice show for skywatchers last year. Now, it's the target of an ongoing investigation.
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Swift Narrows Down Hosts of Important Supernova Class
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.
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Andromeda Galaxy Pops Up Ultraluminous X-ray Sources
Researchers using multiple NASA space observatories have been studying an object known as an ultraluminous X-ray source in the neighboring Andromeda galaxy.
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Swift Finds a Gamma-Ray Burst With a Dual Personality
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
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NASA's Swift Catches Asteroid Flyby
As asteroid 2005 YU55 swept past Earth in the early morning hours of Wednesday, Nov. 9, 2011, Swift monitored the fast-moving space rock.
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How A Distant Black Hole Devoured A Star
Two studies in the Aug. 25 issue of Nature provide new insights into a cosmic accident that has been streaming X-rays toward Earth.
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NASA's Swift Sees Star Gobbled Up by Black Hole
Swift discovered a series of powerful X-ray blasts coming from a source in the constellation Draco.
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Nearby Galaxy Boasts Two Monster Black Holes
NASA satellites have found a second super-sized black hole at the heart of an unusual nearby galaxy already known to be sporting one.
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Swift Finds Most Distant Gamma-ray Burst Yet
After two years of painstaking analysis, astronomers say a stellar blast observed by Swift was the farthest explosion yet identified.