Scientific Satellite

DATE LAUNCHED

NATION

NAME

ACCOMPLISHMENTS

Oct. 4, 1957 USSR Sputnik I First satellite to orbit the Earth.
Nov. 3, 1957 USSR Sputnik 2 First satellite to carry animal into orbit-the dog Laika.
Jan. 31, 1958 US Explorer 1 First American satellite; discovered the radiation belts around the Earth.
Mar. 7, 1962 US OSO-1 First orbiting solar observatory.
Sep. 4, 1964 US OGO-1 First orbiting geophysical observatory.
Dec. 7, 1968 US OAO-2 First orbiting astronomical observatory.
Oct. 31, 1973 USSR Bion 1 Start of Bion series of international biological experiments, involving monkeys.
May 4, 1976 US Lageos High-precision geographic measurements made from space.
Aug. 12, 1977 US HEAO-1 First high-energy astronomy observatory.
Jan. 26, 1978 US/Europe IUE International Ultraviolet Explorer.
Nov. 13, 1978 US Einstein Second high-energy astronomy observatory; found quasars.
Feb. 18, 1979 US SAGE Study of the Earth's stratosphere to measure ozone and aerosols.
Feb. 14, 1980 US Solar Max Observatory designed to study solar activity.
Jan. 25, 1983 US/Europe IRAS First satellite to make detailed all-sky infrared survey.
Mar. 23, 1983 USSR Astron Observatory with ultraviolet and X-ray telescopes.
May 26, 1983 US/Europe Exosat Detailed study of X-ray sources in the Milky Way and other galaxies.
Aug. 16, 1984 US/Europe AMPTE Active Magnetosphere Particle Tracer Explorer to study solar wind and Earth's magnetic field.
Apr. 14, 1988 USSR Foton Materials processing experiments.
Nov. 17, 1989 US COBE First satellite to map cosmic background radiation in detail.
Nov. 30, 1989 USSR Granat Observatory to study distant galaxies.
Apr. 24, 1990 US Hubble First large optical telescope placed in Earth orbit, seeing farther into space than any instrument before.
Jul. 11, 1990 USSR Gamma Observatory to study gamma rays, pulsars and high-energy sources.
Apr. 5, 1991 US Compton 17-tonne gamma ray observatory.
Dec. 18, 1991 USSR Intercosmos 25 Active plasma experiment with subsatellite.
Oct. 27, 1992 Russia Progress M-15 First test of solar sail to light up the night sky from space.
Mar. 2, 1994 Russia Koronas-1 Studied internal structure of the sun.
Nov. 17, 1995 Europe ISO nfrared Space Observatory - successor to IRAS.