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Vesto Melvin Slipher (Mulberry, 11 novembre 1875 – Flagstaff, 8 novembre 1969) è stato un astronomo statunitense
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.
9 apr 2024 · Vesto Slipher 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.
- The Editors of Encyclopaedia Britannica
Vesto Slipher. 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.
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 .
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...
On September 17, 1912, Vesto Slipher obtained the first radial velocity of a "spiral nebula" - the Andromeda Galaxy. Using the 24-inch telescope at Lowell Observatory, he followed up with more Doppler shifts, and wrote a series of papers establishing that large velocities, usually in recession, are a general property of the spiral nebulae.
