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.
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.
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.