ASCA (formerly named Astro-D) was Japan's fourth cosmic X-ray astronomy mission, and the second... View Mission

ASTHROS will carry an instrument to measure the motion and speed of gas around newly-formed... View Mission

The "Astro Observatory" was developed as a system of telescopes that could fly multiple times on... View Mission

Following the scientific success of the Astro-1 mission, Astro-2 was approved as a follow-up... View Mission

The Broad Band X-ray Telescope (BBXRT) was flown on the space shuttle Columbia (STS-35) on... View Mission

The Compton Gamma Ray Observatory was the second of NASA's Great Observatories. Compton, at 17... View Mission

NASA's Chandra X-ray Observatory was launched and deployed by Space Shuttle Columbia on July 23... View Mission

The Cosmic Hot Interstellar Plasma Spectrometer (CHIPS) was a University-Class Explorer (UNEX)... View Mission

The purpose of the Cosmic Background Explorer (COBE) mission was... View Mission

COSI is a soft gamma-ray survey telescope designed to probe the origins of Galactic positrons,... View Mission

The Diffuse X-ray Spectrometer (DXS) was a single experiment shuttle payload designed to fly on... View Mission

Euclid is an ESA-led Medium-class mission, part of ESA’s Cosmic Vision program, to map the... View Mission

The Extreme-Ultraviolet Explorer (EUVE) was a spinning spacecraft designed to rotate about the... View Mission

Launched in June 2008, Fermi, NASA's largest gamma-ray observatory, has opened a wide window on... View Mission

The Far Ultraviolet Spectroscopic Explorer FUSE was a NASA supported mission that launched June... View Mission

The Galaxy Evolution Explorer (GALEX) was an orbiting space... View Mission

The Gravity and Extreme Magnetism Small Explorer (GEMS) did not pass its confirmation review in... View Mission

NASA’s Marshall Space Flight Center and Stanford University developed a sophisticated... View Mission

Launched on February 12, 1997 HALCA, also called VSOP, Muses-B or Haruka (meaning "far away"),... View Mission

The HaloSat mission will address the question: Is there a massive, extended, hot halo around the... View Mission

The Herschel Space Observatory was a space-based telescope that... View Mission

The prime objective of the HETE spacecraft was to carry out the first multiwavelength study of... View Mission

After the launch failure of the HETE-1 spacecraft, it was determined that gamma ray burst... View Mission

ESA's Hipparcos was the first space mission dedicated to measuring the positions, distances,... View Mission

ASTRO-H (formerly known as NeXT and renamed Hitomi) was launched on February 17, 2016 by the... View Mission

The Hubble Space Telescope's launch in 1990 sped humanity to one of its greatest advances in... View Mission

Seven experiments made up the IEH-3 payload on the STS-95 Space Shuttle mission. The seven... View Mission

ESA's INTEGRAL is providing new insight into the most violent and exotic objects of the Universe... View Mission

ISO was an infrared space telescope designed and operated by ESA in cooperation with ISAS (part... View Mission

The IUE satellite was launched on January 26, 1978. It had an expected lifetime of 3 years,... View Mission

The International X-ray Observatory (IXO) was an X-ray astronomy mission with joint... View Mission

The Imaging X-ray Polarimetry Explorer (IXPE) exploits the polarization state of light from... View Mission