EDWIN POWELL HUBBLE
Edwin Powell Hubble 1889-1953
|Automatic translation||Updated June 01, 2013|
Edwin Powell Hubble was an American astronomer born November 20, 1889.
Thus ends the Hubble long debate about the nature of diffuse objects is now known as galaxies. Now the boundaries of the observable universe away accordingly.
Image: Edwin Powell Hubble, Franklin Medal (1939), Gold Medal of the Royal Astronomical Society (1940).
The Hubble diagram was established in 1929, based on analysis of the radial velocities of galaxies, measured by Slipher Vesto from redshifts of spectral lines. It represents the speed of galaxies according to their distance, i.e. more a galaxy is from us, more it seems to move away quickly. It is from this study that the concept of expansion of the universe appears. The rate of expansion of these galaxies is the Hubble constant (Hο) calculated by Edwin Hubble and George Lemaitre in 1930. This discovery permits go back to the Big Bang and give an age to the observable universe which at the time was estimated to be between 12 and 14 billion years. Universe in 2013 according to the analysis more detailed, of the Planck telescope is old 13.8 billions years.
The inverse of the Hubble constant is called the "Hubble time" it is the time since the Big Bang, so the age of the universe. Hubble stated in 1929, his famous law: "The galaxies are moving away from each other at a speed proportional to their distance."
Image: the Hubble diagram represents the speed of galaxies according to their distance, i.e. more a galaxy is from us, more it seems to move away quickly. It is from this study that the concept of expansion of the universe appears. Credit NASA.
Aristotle (-384 -322 av JC)
Nicolaus Copernicus (1473-1543)
Tycho Brahe (1546-1601)
Galileo Galilei (1564-1642)
Johannes Kepler (1571 - 1630)
Isaac Newton (1642-1727)
Friedrich Wilhelm Herschel (1738-1822)
Pierre Simon Laplace (1749-1827)
Caroline Lucretia Herschel (1750-1848)
Friedrich Wilhelm Bessel (1784-1846)
Michael Faraday (1791-1867)
John Frederick Herschel (1792-1871)
Charles Darwin (1809-1882)
James Clerk Maxwell (1831-1879)
George Ellery Hale (1868-1938)
Henrietta Swan Leavitt (1868-1921)
Willem De Sitter (1872-1934)
Karl Schwarzschild (1873-1916)
Albert Einstein (1879-1955)
Harlow Shapley (1885-1972)
Erwin Schrödinger (1887-1961)
Edwin Powell Hubble (1889-1953)
Walter Baade (1893-1960)
Bernard Lyot (1897-1952)
Jan Hendrik Oort (1900-1992)
John Wheeler (1911-2008)
Stanley Miller (1930-2007)
Frank Drake (1930-