X-ray astronomy

| Mass = 2600 kg (6220 kg with orbital insertion hardware attached) Phobos 2 was a Russian space probe designed to explore Mars's moons Phobos and Deimos.

Koronas-Foton (Russian: Коронас-Фотон), also known as CORONAS-Photon (Complex Orbital Observations Near-Earth of Activity of the Sun-Photon), was a Russian Solar research satellite.

Skylab 2 (also SL-2 and SLM-1) was the first manned mission to Skylab, the first U.

Philae (/ˈfaɪliː/ or /ˈfiːleɪ/) is a robotic European Space Agency lander that accompanied the Rosetta spacecraft until it separated to land on comet 67P/Churyumov–Gerasimenko, ten years and eight months after departing Earth.

The Small Astronomy Satellite 3 (SAS 3, also known as SAS-C before launch) was a NASA X-ray astronomy space telescope.

Kosmos 461 (Russian: Космос 461 meaning Cosmos 461), also known as DS-U2-MT No.

Kvant-1 (Russian: Квант-1; English: Quantum-I/1) (37KE) was the first module to be attached in 1987 to the Mir Core Module, which formed the core of the Soviet space station Mir.

Skylab was the United States' first space station, orbiting Earth from 1973 to 1979, when it fell back to Earth amid huge worldwide media attention.

HEAO-1 surveyed the sky in the X-ray portion of the electromagnetic spectrum (0.2 keV - 10 MeV), providing nearly constant monitoring of X-ray sources near the ecliptic poles and more detailed studies of a number of objects by observations lasting 3-6 hours.

Cygnus X-3 is one of the stronger binary X-ray sources in the sky.

The Compton Gamma Ray Observatory (CGRO) was a space observatory detecting light from 20 keV to 30 GeV in Earth orbit from 1991 to 2000.

The last of NASA's three High Energy Astronomy Observatories, HEAO 3 was launched 20 September 1979 on an Atlas-Centaur launch vehicle, into a nearly circular, 43.

The Astronomical Netherlands Satellite (ANS; also known as Astronomische Nederlandse Satelliet) was a space-based X-ray and ultraviolet telescope.

The Swift Gamma-Ray Burst Mission consists of a robotic spacecraft called Swift, which was launched into orbit on November 20, 2004, at 17:16:00 UTC on a Delta II 7320-10C expendable launch vehicle.

Salyut 4 (DOS 4) (Russian: Салют-4; English translation: Salute 4) was a Salyut space station launched on December 26, 1974 into an orbit with an apogee of 355 km, a perigee of 343 km and an orbital inclination of 51.

Phobos 1 was an unmanned Russian space probe of the Phobos Program launched from the Baikonour launch facility on 7 July 1988.

Astrosat is India's first dedicated multi-wavelength space observatory.

The Extreme Ultraviolet Explorer (EUVE) was a space telescope for ultraviolet astronomy, launched on June 7, 1992.

Gamma was a Soviet gamma ray telescope.

The history of X-ray astronomy begins in the 1920s, with interest in short wave communications for the U.

Astrophysical X-ray sources are astronomical objects with physical properties which result in the emission of X-rays.

G117-B15A is a small, well-observed variable white dwarf star of the DAV, or ZZ Ceti, type in the constellation of Leo Minor.