Edwin Powell Hubble

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Noun1.Edwin Powell Hubble - United States astronomer who discovered that (as the universe expands) the speed with which nebulae recede increases with their distance from the observer (1889-1953)
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There is also an interesting article on Edwin Powell Hubble, the astronomer who changed our view of the universe.
This unique telescope, named after Edwin Powell Hubble (1889-1953), who was born in Marshfield, Missouri, has shown that spiral nebulae lie much further away than previously thought, revealing them to be galaxies like our own Milky Way.
Then in 1924 Edwin Powell Hubble, looking through a new telescope at the Mount Wilson Observatory in California, discovered that the nebulae he saw were not just dust and gas sprinkled about the Milky Way.