telescope and space missions eassy
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A space telescope or space observatory is a telescope located in outer space to observe distant planets, galaxies and other astronomical objects. Space telescopes avoid the filtering of ultraviolet frequencies, X-rays and gamma rays; the distortion (scintillation) of electromagnetic radiation; as well as light pollution which ground-based observatories encounter.[1]
Suggested by Lyman Spitzer in 1946, the first operational space telescopes were the American Orbiting Astronomical Observatory, OAO-2 launched in 1968, and the Soviet Orion 1 ultraviolet telescope aboard space station Salyut 1 in 1971.
Space telescopes are distinct from satellites that point toward Earth for satellite imagery for espionage, weather analysis and other types of information gathering. Space observatories are divided into two types: Astronomical survey satellites to map the entire sky, and satellites which focus on selected astronomical objects or parts of the sky and beyond.