SUNSET: 
NASA Launches New X-ray Explorer
The Imaging X-ray Polarimetry Explorer will shed new light on energetic and enigmatic sources such as magnetars, supernovae, and black holes.
Did We Find a Planet in Another Galaxy?
Astronomers using an innovative method have detected the signal of what could be an extragalactic exoplanet. But confirming its existence will be difficult.
What — and Where — Is the North Polar Spur?
Astronomers make the case that a gigantic ridge of gas sticking out of the galactic plane was blown out by a cluster of nearby supernovae.
First All-sky Map from eRosita
The first all-sky X-ray map to be released in 30 years reveals new wonders of the hot and energetic universe.
First Light for German X-ray Telescope EROSITA
The EROSITA X-ray telescope aboard the German-Russian Spektr-RG satellite has taken its first images of the hot universe.
7 Incredible Discoveries from Two Decades of X-rays
On the eve of the 20th anniversaries for both the Chandra and XMM-Newton X-ray observatories, we celebrate with a look back at seven of their most incredible discoveries.
Blast from the Past in Today’s Sky
Astronomers think they have identified the remnant of a supernova recorded by Chinese astronomers in AD 386.
Astronomy in Space with David Dickinson
HaloSat: A Small Satellite for a Big Question
HaloSat, a mini-satellite recently deployed from the International Space Station, is on the hunt for the universe's missing matter.
The X-ray Legacy of RXTE
The RXTE satellite, which reentered Earth's atmosphere over the tropics on April 30th, leaves behind a legacy of discoveries and data.
Astronomy in Space with David Dickinson
China Launches Its First X-ray Observatory
China's Hard X-ray Modulation Telescope (HXMT) headed to orbit this past weekend.
Brilliant X-ray Flashes from Faraway Black Holes?
Two sources tens of millions of light-years away have sent puzzling X-ray flares blazing our way. Now astronomers think they might have the answer: intermediate-mass black holes.
Astronomy in Space with David Dickinson
Recovery Attempts End for Hitomi X-ray Satellite
The Japanese space agency JAXA has released a timeline covering the Hitomi space observatory's failure last month. Salvage efforts continue but recovery appears unlikely.