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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.
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.
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.
The Sphere instrument on the VLT in Chile peers with all its might into the blackness around a binary star system and returns a surprise for astronomers.
Its root cause still undetermined, a huge X-ray flare from the Milky Way's center has made NASA scientists sit up and take notice.
The discovery of a new unusually bright dead star leads astronomers to question assumptions about a type of cosmic radiation -- and pulsars themselves.
While we typically think of black holes as death pits from which nothing can escape, recent studies suggest black holes play a pivotal role in creating stars. Could one have created our sun?
Astronomers use the Very Large Telescope to reveal a space drama involving two unique stars in the Ara constellation.
An Austrian auction house will soon take bids on a camera it claims is the only handheld to come home from an Apollo mission.