Hubble, Edwin

Hubble, Edwin. The Realm of the Nebulae. Yale University Press, New Haven. 1936. 

Hoffmann-Ostenhoff Maria, 423 Hoffmann-Ostenhoff Thomas, 423 Hogervorst Wim, 150 Hohenberg Pierre, 675 Holthausen Max C., 676, 715, 665, 676 Hooke Robert, 349 Howard Brian J., 899 Hubble Edwin Powell, 594 Hue Ivan, 971, 976 Hiickel Erich, 392, 427 Huckel Walter, 427 Hull Erika, 715 Hund Friedrich Hermann, 161, 461 Hurley Andrew... 

Hubble. Edwin Powell (1889-1953) US astronomer, who worked at both the Yerkes Observatory and the Mount Wilson Observatory. Most of his studies involved nebulae and galaxies, which he classified in 1926. In 1929 he established the Hubble constant, which enabled him to estimate the age of the universe. The Hubble space telescope is named after him. 

Hruby Arnost (1919-), Czech phys., synthesis and thermal analysis of complex glassy chalcogenides, devised Hruby glassforming coefficient Hubble Edwin Powell (1889-1953) US. astronom, initiated the study of the universe beyond our galaxy ( Observational Approach to Cosmology ... 

Edwin Hubble measured the distance of several Cepheids in the great Andromeda nebula and found that it was situated far beyond the globular clusters in the retinue of the Milky Way. It was then that the milky designation galaxy made its entry into astronomy. The age of extragalactic astronomy had... 

Let us now turn our attention to the relationship between stellar physics (extended to supernovas) and observational cosmology. Edwin Hubble is remembered for the discovery that the Universe is expanding. Less well known is the redshift-magnitude plot that carries his name. Magnitude is a measure of the apparent brightness of celestial objects, and redshift is a measure of their recession speed and hence their distance. 

Osterbrock DE, Gwinn JA, Brashear RS. Edwin Hubble and the expanding universe. Sci Am 1993 84. 

In 1929 Edwin Hubble published the famous law that today bears his name namely, all galaxies recede from each other, and they do so in such a way that the greater the distance between a pair, the greater their velocity of separation. Hubble observed this from the Earth s point ofview namely, the more distant... 

The demanding dimensional stability requirements of NASA s Space telescope named after one of the leading American astronomers, Edwin P. Hubble are met by this ultra low expansion glass Corning 7971. The Ritchey-Chretien telescope with... 

In the latter part of the 19th century Clausius law was also used to predict the heat death of the universe. Just as gas molecules left to their own devices in a closed box will reach a state of maximum randomness, it was argued the same thing would ultimately happen to the universe. At some distant time, the entropy of the universe would be maximized, a state of final equilibrium would prevail, and all processes would cease. This rather bleak outlook was shattered in 1929 when Edwin Hubble discovered that the universe is expanding. In a constantly changing universe, total equilibrium is unattainable and entropy must keep changing. 

The astronomical evidence that prompted abandonment of the concept of an equilibrium universe, in favour of an expanding one, is largely due to the work of Edwin Hubble, but without the explosive development of physics in the first quarter of the 20th century, his work would not have been possible. As with Newton and Darwin, new ideas were in the air, and Hubble was the one to complete the synthesis of ideas that created a new world view. Some of the other important players include James Clerk Maxwell (1831-79), Johann Balmer (1825-1898), Max Planck (1858-1947), Albert Einstein (1879-1955) and Niels Bohr (1885-1962). Without the insight of these scientists Hubble s observations make no sense. 

Edwin Powell Hubble (1889-1953), American astronomer and explorer of galaxies, found in 1929 that the distance between galaxies is proportional to the infrared shift in their spectrum caused by the Doppler effect, which is consequently interpreted as expansion of the Universe. A surprise from recent astronomical studies is that the expansion is faster and faster (for unknown reasons). 

The Hubble Space Telescope, or HST, named in honor of Dr. Edwin P. Hubble, was launched by the National Aeronautics and Space Administration (NASA) into orbit 614 km above the earth on April 24,1990, from Space Shuttle Discovery. Launch had been delayed more than 3 years following the loss of the Space Shuttle Challenger in 1986. Eigure 10 illustrates the HST and its major components. Although many other smaller telescopes have... 

---