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Interstellar echoes from a flaring neutron star have allowed astronomers to solve a mystery -- pinpointing the star's location.
NASA's Chandra X-ray Observatory captures the first-ever X-ray of an exoplanet passing in front of its parent star in a system that is 63 light-years from Earth.
It takes a mighty wind to keep stars from forming. Researchers have found one in a galaxy far, far away -- and NASA made a short movie about it.
An X-ray telescope designed to hunt for black holes takes a look at the sun and helps NASA deliver an intense portrait of our closest star.
One of the most powerful black holes in the observable universe has been revealed by NASA's Chandra X-Ray Observatory.
Strange signals picked up by the radio telescope pointed towards the stars in Parkes, Australia have a rather more mundane origin.
A black hole that hasn't been heard of since 1989 has suddenly become active again and is now the brightest object in the X-ray sky.
Astronomers have pieced together Hubble data to observe a collision between knots of matter in the jet of a supermassive black hole for the first time.
To celebrate the release of "Age of Ultron," a type of star that will "live fast and die hard" is creating a nebula fitting for a Norse god. (Well, not really for that reason.)
To celebrate the work being done by its Solar Dynamics Observatory, NASA has released a video of highlights on the fifth anniversary of its launch.