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.