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1989 In Science
The year 1989 in science and technology involved many significant events, some listed below. Astronomy * August – Asteroid 4769 Castalia is the first asteroid directly imaged, by radar from Arecibo. * August 25 – The ''Voyager 2'' spacecraft makes its closest approach to Neptune, providing definitive proof of the planet's rings. * September 5 – Pluto– Charon barycentre comes to perihelion. * Asteroid 5128 Wakabayashi is discovered by Masahiro Koishikawa. * 4292 Aoba is discovered. * 4871 Riverside is discovered. * 6089 Izumi is discovered. * 6190 Rennes is discovered * 8084 Dallas is discovered. Biology * Discovery of the cystic fibrosis trans-membrane conductance regulator gene. * The New Zealand Department of Conservation begins to implement a Kakapo Recovery Plan. Computer science * March 12 - Tim Berners-Lee submits a memorandum, titled "Information Management: A Proposal", to the management at CERN for a system that would eventually become the World Wide Web ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroid
An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere. Of the roughly one million known asteroids the greatest number are located between the orbits of Mars and Jupiter, approximately 2 to 4 AU from the Sun, in the main asteroid belt. Asteroids are generally classified to be of three types: C-type, M-type, and S-type. These were named after and are generally identified with carbonaceous, metallic, and silicaceous compositions, respectively. The size of asteroids varies greatly; the largest, Ceres, is almost across and qualifies as a dwarf planet. The total mass of all the asteroids combined is only 3% that of Earth's Moon. The majority of main belt asteroids follow slightly elliptical, stable orbits, revolving in the same direction as the Earth and taking from three to six years to comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8084 Dallas
8 (eight) is the natural number following 7 and preceding 9. In mathematics 8 is: * a composite number, its proper divisors being , , and . It is twice 4 or four times 2. * a power of two, being 2 (two cubed), and is the first number of the form , being an integer greater than 1. * the first number which is neither prime nor semiprime. * the base of the octal number system, which is mostly used with computers. In octal, one digit represents three bits. In modern computers, a byte is a grouping of eight bits, also called an octet. * a Fibonacci number, being plus . The next Fibonacci number is . 8 is the only positive Fibonacci number, aside from 1, that is a perfect cube. * the only nonzero perfect power that is one less than another perfect power, by Mihăilescu's Theorem. * the order of the smallest non-abelian group all of whose subgroups are normal. * the dimension of the octonions and is the highest possible dimension of a normed division algebra. * the first number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Fraud And Abuse Act
The Computer Fraud and Abuse Act of 1986 (CFAA) is a United States cybersecurity bill that was enacted in 1986 as an amendment to existing computer fraud law (), which had been included in the Comprehensive Crime Control Act of 1984. The law prohibits accessing a computer without authorization, or in excess of authorization. Prior to computer-specific criminal laws, computer crimes were prosecuted as mail and wire fraud, but the applying law was often insufficient. The original 1984 bill was enacted in response to concern that computer-related crimes might go unpunished. The House Committee Report to the original computer crime bill characterized the 1983 techno-thriller film ''WarGames''—in which a young teenager (played by Matthew Broderick) from Seattle breaks into a U.S. military supercomputer programmed to predict possible outcomes of nuclear war and unwittingly almost starts World War III—as "a realistic representation of the automatic dialing and access capabilities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
