A space telescope is a telescope which is located outside the Earth's atmosphere in space. Benefits of space for telescopes are missing air turbulence and access to swallowed by the atmosphere ranges of the electromagnetic radiation such as gamma rays, X-rays and infrared radiation. In addition, the space allows for very long baselines, for example, in radio interferometry (see eg HALCA ) or to search for gravitational waves (see LISA ).
In most cases, space telescopes are in orbit around the earth, but future telescopes will increasingly occupy the Lagrange points of the Earth's orbit. Already today, SOHO is located at the inner Lagrangian point L1, can be observed from which the sun continuously. The probe for the study of the cosmic background radiation WMAP circled around the outer Lagrangian point L2, where the simultaneous shield against disturbing radiation from the Earth and Sun is easier. Another possibility is orbits around the Sun as the Spitzer Space Telescope.
List of space telescopes (excerpt)
2012 announced the first private space companies and operators to launch and deployment of space-based telescopes to. Planetary Resources is planning the construction and use of multiple telescopes Arkyd -100 Leo Space Telescope to detect asteroids and other objects that might be suitable in the future for asteroid mining. The B612 Foundation is planning to start an IR space telescope Sentinel for 2017, to be used for the mapping and early Near-Earth Objects.