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Vesto Melvin Slipher ( / ˈslaɪfər /; November 11, 1875 – November 8, 1969) was an American astronomer who performed the first measurements of radial velocities for galaxies. He was the first to discover that distant galaxies are redshifted, thus providing the first empirical basis for the expansion of the universe.
Vesto Melvin Slipher (Mulberry, 11 de novembro de 1875 — Flagstaff, 8 de novembro de 1969) foi um astrónomo estadunidense. Entre as suas investigações destaca-se por ter medido pela primeira vez a velocidade radial de uma galáxia e por ter descoberto a existência de gás e poeiras no meio interestelar .
Slipher discovered and measured the rotations of the spirals. He also made extensive studies of the spectra of the night sky and the aurorae. As director he organized and supervised the successful search for a ninth planet .
9 de abr. de 2024 · Vesto Slipher (born November 11, 1875, near Mulberry, Indiana, U.S.—died November 8, 1969, Flagstaff, Arizona) was an American astronomer whose systematic observations (1912–25) of the extraordinary radial velocities of spiral galaxies provided the first evidence supporting the expanding-universe theory. Born on an Indiana farm ...
- The Editors of Encyclopaedia Britannica
Vesto Melvin Slipher (1875 - 1969) History. This page is motivated by a feeling I have held for some years: that a very large share of the credit for the discovery of the expanding universe is due to Slipher, and yet he tends to take very much second place to Hubble in most accounts.
In what follows, I will explain the early development of nebular spectrographs, briefly state Slipher’s technological breakthroughs, and summarize how the Mt. Wilson group moved on to measure redshifts of even fainter galaxies. Prior to the use of dry photographic emulsions, spectroscopy was a visual science.
VESTO MELVIN SLIPHER, a pioneer in the field of astro- nomical spectroscopy during his long career at the Lowell Observatory at Flagstaff, Arizona, probably made more fundamental discoveries than any other observational astronomer of the twentieth century.1 He is best known for his discovery in 1913 of the extraor-dinary radial velocities of the...
