NICER mounted on the International Space Station

Space Missions

NASA to Use Pulsar Navigation for Deep Space Missions

NICER and SEXTANT demonstrate XNAV pulsar navigation system that may be used on Artemis.

NICER All-sky

Space Missions

NICER Maps the X-ray Sky

NASA's NICER instrument aboard the International Space Station is giving us a unique view of much of the X-ray sky.

Artist's concept of MAXI J1820+070

Black Holes

How “Light Echoes” Revealed a Black Hole’s Feeding Habits

Astronomers are taking a cue from bats, using a method similar to echolocation to map out the feeding environment around a black hole.