A Dictionary of Astronomy (Oxford Paperback Reference) by Ian Ridpath PDF

By Ian Ridpath

ISBN-10: 0192115960

ISBN-13: 9780192115966

Astronomy is increasing virtually as speedily because the universe itself, and the proliferating medical jargon can occasionally baffle even the main committed beginner. Now, in a few 4,000 concise, updated entries, this dictionary cuts a transparent course during the maze of advanced technical language, delivering complete, transparent definitions drawn from all points of astronomy. Compiled by way of Ian Ridpath, a fellow of the Royal Astronomical Society, and knowledgeable staff of members, A Dictionary of Astronomy includes the newest entries from astrophysics and cosmology to galaxies and time.

Here are succinct definitions for the large Bang conception, comets, eclipses, Magellanic Clouds, Mars, quasar, relativity, and variable stars. Entries on telescopes and different measuring units, observatories, house missions, and lately named sun process gadgets convey how astronomers have explored the universe. The Dictionary additionally presents biographical entries on eminent astronomers from Copernicus to Edwin Hubble.

From black gap to white dwarf, and from spiral galaxies to sun waves, A Dictionary of Astronomy opens a window at the universe for newbie astronomers in every single place.

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M. *Antoniadi. ap-, apo- Prefixes referring to the point in an elliptical orbit that lies farthest from the object being orbited, as in *aphelion and *apogee. Apache Point Observatory An observatory at an altitude of 2780 m in the Sacramento Mountains near Sunspot, New Mexico. 5-m reflector due to start operation in 1997 for the *Sloan Digital Sky Survey; and a 1-m reflector owned by New Mexico State University. The observatory is owned and operated by the Astrophysical Research Consortium (ARC), whose members are the University of Chicago, the Institute for Advanced Study at Princeton, Johns Hopkins University, New Mexico State University, Princeton University, the University of Washington, and Washington State University.

Al- For personal names beginning 'al-', see under the next element of the name. Albategnius Latinized name of al-*Battani. al-Battani See under BATTANI. albedo The fraction of the total light or other radiation falling on a non-luminous body, such as a planet, or on a planetary surface feature, that is reflected from it. In general, the albedo is equal to the amount of light reflected divided by the amount of light received. 0 (100%) for a perfect reflector. Planets or planetary satellites with dense atmospheres have much higher albedos than those with transparent or no atmospheres.

76-m Thaw refractor, in operation since 1914 but fitted with a new objective lens in 1985. 76-m Keeler astrometric reflector, opened in 1906 but given a new mirror in 1990. Allende meteorite A meteorite of *carbonaceous chondrite type, which fell near Pueblito de Allende, northern Mexico, on 1969 February 8, scattering thousands of fragments over an area of 48 × 7 km. The parent body probably weighed over 30 tonnes. More than 2 tonnes of CV3-type material were collected, the largest piece weighing 110 kg.

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