"Eventually, we reach the utmost limits of our telescopes. There, we measure shadows and search among ghostly errors of measurement for landmarks that are scarcely more substantial." -- Astronomer Edwin Hubble (11/20/1889 - 9/28/1963), from The Realm of the Nebulae (1936). Hubble was a tremendously influential figure in astronomy with his proof of other galaxies beyond our own, and his "Hubble's Law," which demonstrated that the universe is expanding. The telescope named after him has allowed astronomers to further understand the origin and nature of the universe.
(photo: Johan Hagemeyer / Public Domain; background: Hubble image of NGC 2174 - NASA, ESA, and the Hubble Heritage Team)
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