The Hubble Telescope is not only one of the largest and most versatile piece of astronomical equipment today, but is one of a number of the Great Observatories, which number only four including the Hubble. Its existence alone is a boon to the astronomy community, for it is well-equipped, well-known, and still maintains its uses as it is designed to be serviced in space, saving the need to recover it for maintenance planet-side.
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