Hubble Pinpoints Farthest Protocluster of Galaxies Ever Seen

Using NASA's Hubble Space Telescope, astronomers have uncovered a cluster of galaxies in the initial stages…

NASA’s Chandra Finds Largest Galaxy Cluster in Early Universe

An exceptional galaxy cluster, the largest seen in the distant universe, has been found using NASA's…

NASA’s RXTE Helps Pinpoint Launch of ‘Bullets’ in a Black Hole’s Jet

Using observations from NASA's Rossi X-ray Timing Explorer satellite and the National Science Foundation's Very Long…

NASA’s Rossi X-Ray Timing Explorer Completes Mission Operations

After 16 years in space, NASA's Rossi X-ray Timing Explorer (RXTE) has made its last observation.…

Exoplanets, Supernovae, High-Energy Sky, New Images Among NASA News Highlights at American Astronomical Society Meeting

NASA researchers will present new findings on a wide range of space science topics during the…

Cryogenic Testing Completed For NASA’s Webb Telescope Mirrors

Cryogenic testing is complete for the final six primary mirror segments and a secondary mirror that…

NASA Discovers First Earth-Size Planets Beyond Our Solar System

NASA's Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar…

SOFIA Observatory Peers Into Heart of Orion Nebula

A new image from NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) shows a complex distribution of…

NASA’s Kepler Announcing Newly Confirmed Planets

NASA will host a news teleconference at 1 p.m. EST, Tuesday, Dec. 20, announcing new discoveries…

NASA’s RXTE Detects ‘Heartbeat’ of Smallest Black Hole Candidate

An international team of astronomers has identified a candidate for the smallest-known black hole using data…