Three unusually long-lasting stellar explosions discovered by NASA’s Swift satellite represent a previously unrecognized class of gamma-ray bursts (GRBs).
An exploding star observed in 1604 by the German astronomer Johannes Kepler held a greater fraction of heavy elements than the sun, according to an analysis of X-ray observations from Suzaku.
NICER will gather scientific data revealing the physics of the densest matter allowed in nature, and could revolutionize our ability to travel to the far reaches of the solar system and beyond.
NASA's Astrophysics Explorer Program has selected two missions for launch in 2017: a planet-hunting satellite and an International Space Station instrument to observe X-rays from stars.
Astronomers from the University of Maryland at College Park (UMCP) and Lowell Observatory have used NASA's Swift satellite to check out comet C/2012 S1 (ISON).
While performing an extensive X-ray survey of our galaxy's central regions, NASA's Swift satellite has uncovered the previously unknown remains of a shattered star.
Back in January, a new X-ray source flared and rapidly brightened in the Andromeda galaxy (M31). It became the target of an intense observing campaign by orbiting X-ray telescopes -- including NASA's Swift.
Last year, astronomers discovered a black hole in a distant galaxy that erupted after shredding and consuming a passing star. Now an X-ray signal that comes from matter on the verge of falling into the black hole has been observed.
The inspiration behind NASA scientist Maxim Markevitch's quest to build a highly specialized X-ray mirror using a never-before-tried technique comes from an unusual source: a roll of Scotch® tape.
Using combined data from a trio of orbiting X-ray telescopes astronomers have obtained a rare glimpse of the powerful phenomena that accompany a still-forming star.
An international team of astronomers using data from NASA's Hubble Space Telescope has made an unparalleled observation, detecting significant changes in the atmosphere of a planet located beyond our solar system.
NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) launched into the morning skies over the central Pacific Ocean at 9 a.m. PDT (noon EDT) Wednesday, beginning its mission to unveil secrets of buried black holes and other exotic objects.
NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, and its rocket flew above the palm trees to arrive at their launch location at the U.S. Army's Reagan test site at Kwajalein Atoll.
An international team of astronomers using data from the European Space Agency's (ESA) XMM-Newton satellite has identified a long-sought X-ray "echo" that promises a new way to probe supersized black holes in distant galaxies.
NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, is being prepared for the final journey to its launch pad on Kwajalein Atoll in the central Pacific Ocean. The mission will study everything from massive black holes to our own sun.
Studies using X-ray and ultraviolet observations from NASA's Swift satellite provide new insights into the elusive origins of an important class of exploding star called Type Ia supernovae.
In October 2010, a neutron star near the center of our galaxy erupted with hundreds of X-ray bursts that were powered by a barrage of thermonuclear explosions on the star's surface.
Francesco Tombesi has identified a new type of black-hole-driven outflow that appears to explain the correlation between the mass of a galaxy's central black hole and the velocity of stars in a a galaxy's vast, roughly spherical structure known as its bulge.
Using observations from the RXTE satellite and the VLBA radio telescope, an international team of astronomers has identified the moment when a black hole in our galaxy launched super-fast knots of gas into space.
Over 16 years of operation, he Rossi X-ray Timing Explorer (RXTE) far exceeded its original science goals and has left astronomers with a scientific bounty that will serve them for years to come.
An international team of astronomers has identified a candidate for the smallest-known black hole using data from NASA's Rossi X-ray Timing Explorer (RXTE).
Neutron stars have been called the zombies of the cosmos, shining on even though they're technically dead, and occasionally feeding on a neighboring star if it gets too close.
A study using NASA's Swift satellite and the Chandra X-ray Observatory has found a second supersized black hole at the heart of an unusual nearby galaxy already known to be sporting one.