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1924 Edwin P. Hubble: Cepheids in Spiral Nebulae L. R. Cleveland: For two papers on the symbiosis between termites and their intestinal protozoa: 1923 Leonard Eugene Dickson: On the Theory of Numbers and Generalized Quaternions
Edwin Powell Hubble (November 20, 1889 – September 28, 1953) [1] was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology .
November 23 – Edwin Hubble announces his discovery that Andromeda, previously believed to be a nebula, is actually another galaxy, and that the Milky Way is only one of many such galaxies in the universe. [1] The Einstein Tower near Potsdam, Germany, designed by Erich Mendelsohn, becomes operational as an astrophysical observatory.
It was used by Edwin Hubble to make observations with which he produced two fundamental results which changed the scientific view of the Universe. Using observations he made in 1922–1923, Hubble was able to prove that the Universe extends beyond the Milky Way galaxy, and that several nebulae were millions of light-years away.
Observations indicate that there are SMBHs located near the center of most normal galaxies. [ 191 ] [ 192 ] The nature of the Milky Way's bar is actively debated, with estimates for its half-length and orientation spanning from 1 to 5 kpc (3,000–16,000 ly) and 10–50 degrees relative to the line of sight from Earth to the Galactic Center.
In 1899, observations of Neptune's moon Triton were published, with data recorded using the Warner & Swasey micrometer. [43] In 1898 and 1899, Neptune was at opposition. [43] In 1906, a star catalog of over 13,600 stars was published. [44] Also, there was important work on Solar research in the early years, which was of interest to Hale. [44]
1924: Edwin Hubble: the discovery that the Milky Way is just one of many galaxies 1925: Erwin Schrödinger : Schrödinger equation ( Quantum mechanics ) 1925: Cecilia Payne-Gaposchkin : Discovery of the composition of the Sun and that hydrogen is the most abundant element in the Universe
The observational result of Hubble's law, the proportional relationship between distance and the speed with which a galaxy is moving away from us, usually referred to as redshift, is a product of the cosmic distance ladder. Edwin Hubble observed that fainter galaxies are more redshifted. Finding the value of the Hubble constant was the result ...