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1976 In Science
The year 1976 in science and technology involved some significant events, listed below. Astronomy and space exploration * March – Faber–Jackson relation presented by astronomers Sandra M. Faber and Robert Earl Jackson. * June 18 – Gravity Probe A, a satellite-based experiment to test Albert Einstein's theory of general relativity, is launched. * July 20 – Viking program: The ''Viking 1'' lander successfully lands on Mars. * July 31 – NASA releases the famous 'Face on Mars' photograph, taken by ''Viking 1'' * August 7 – Viking program: ''Viking 2'' enters into orbit around Mars. * August 22 – Luna program: Luna 24 successfully makes an unmanned landing on the Moon, the last for 37 years. * September 3 – Viking program: The ''Viking 2'' spacecraft lands at Utopia Planitia on Mars and takes the first close-up color photographs of the planet's surface. * September 17 – Space Shuttle ''Enterprise'' rolled out. * ''Universe'', a public domain film produced by Les ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faber–Jackson Relation
The Faber–Jackson relation provided the first empirical power-law relation between the luminosity L and the central stellar velocity dispersion \sigma of elliptical galaxy, and was presented by the astronomers Sandra M. Faber and Robert Earl Jackson in 1976. Their relation can be expressed mathematically as: : L \propto \sigma^ \gamma with the index \gamma approximately equal to 4. In 1962, Rudolph Minkowski had discovered and wrote that a "correlation between velocity dispersion and uminosityexists, but it is poor" and that "it seems important to extend the observations to more objects, especially at low and medium absolute magnitudes". This was important because the value of \gamma depends on the range of galaxy luminosities that is fitted, with a value of 2 for low-luminosity elliptical galaxies discovered by a team led by Roger Davies, and a value of 5 reported by Paul L. Schechter for luminous elliptical galaxies.Paul L. Schechter (1980)Mass-to-light ratios fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universe (1976 Film)
''Universe'' is a 1976 American short documentary film directed by Lester Novros and narrated by William Shatner. It was nominated for an Academy Award The Academy Awards, better known as the Oscars, are awards for artistic and technical merit for the American and international film industry. The awards are regarded by many as the most prestigious, significant awards in the entertainment ind ... for Best Documentary Short. References External links * 1976 films American short documentary films 1970s short documentary films Documentary films about outer space 1970s English-language films 1970s American films {{sci-documentary-film-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cray Research
Cray Inc., a subsidiary of Hewlett Packard Enterprise, is an American supercomputer manufacturer headquartered in Seattle, Washington. It also manufactures systems for data storage and analytics. Several Cray supercomputer systems are listed in the TOP500, which ranks the most powerful supercomputers in the world. Cray manufactures its products in part in Chippewa Falls, Wisconsin, where its founder, Seymour Cray, was born and raised. The company also has offices in Bloomington, Minnesota (which have been converted to Hewlett Packard Enterprise offices), and numerous other sales, service, engineering, and R&D locations around the world. The company's predecessor, Cray Research, Inc. (CRI), was founded in 1972 by computer designer Seymour Cray. Seymour Cray later formed Cray Computer Corporation (CCC) in 1989, which went bankrupt in 1995. Cray Research was acquired by Silicon Graphics (SGI) in 1996. Cray Inc. was formed in 2000 when Tera Computer Company purchased the Cray Res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seymour Cray
Seymour Roger Cray (September 28, 1925 – October 5, 1996 ) was an American and architect who designed a series of computers that were the fastest in the world for decades, and founded which built many of these machines. Called "the father of supercomputing", Cray has been credited with creating the supercomputer industry. |
Supercomputer
A supercomputer is a computer with a high level of performance as compared to a general-purpose computer. The performance of a supercomputer is commonly measured in floating-point operations per second ( FLOPS) instead of million instructions per second (MIPS). Since 2017, there have existed supercomputers which can perform over 1017 FLOPS (a hundred quadrillion FLOPS, 100 petaFLOPS or 100 PFLOPS). For comparison, a desktop computer has performance in the range of hundreds of gigaFLOPS (1011) to tens of teraFLOPS (1013). Since November 2017, all of the world's fastest 500 supercomputers run on Linux-based operating systems. Additional research is being conducted in the United States, the European Union, Taiwan, Japan, and China to build faster, more powerful and technologically superior exascale supercomputers. Supercomputers play an important role in the field of computational science, and are used for a wide range of computationally intensive tasks in var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
