DAVID DUCROS / SCIENCE PHOTO LIBRARY DAVID DUCROS / SCIENCE PHOTO LIBRARY
Hubble Space Telescope. Computer artwork of the Hubble Space Telescope (HST) in orbit over Earth, facing a collage of images that are typical of those it produces. The astronomical bodies present include a spiral galaxy (lower centre), the planet Saturn (upper left), an interstellar gas cloud (nebula, top right) & distant galaxies (top left). HST images are 10 times more detailed than those from ground telescopes, expanding the observable universe by 350 times, because light reaching it has not been affected by the atmosphere. The HST has a 2.4-metre primary mirror & makes observa- tions at ultraviolet, optical & infrared wave- lengths. The HST was launched on 24 April 1990.
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