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 Fermi Space Telescope Explores New Energy Extremes

After more than three years in space, NASA's Fermi Gamma-ray Space Telescope is extending its view…

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…