By Ian Ridpath
Astronomy is increasing nearly as swiftly because the universe itself, and the proliferating clinical jargon can occasionally baffle even the main devoted novice. Now, in a few 4,000 concise, up to date entries, this dictionary cuts a transparent course during the maze of complicated technical language, supplying complete, transparent definitions drawn from all features of astronomy. Compiled by means of Ian Ridpath, a fellow of the Royal Astronomical Society, and a professional workforce of members, A Dictionary of Astronomy includes the newest entries from astrophysics and cosmology to galaxies and time.
Here are succinct definitions for the massive Bang concept, comets, eclipses, Magellanic Clouds, Mars, quasar, relativity, and variable stars. Entries on telescopes and different measuring units, observatories, house missions, and lately named sunlight approach gadgets express how astronomers have explored the universe. The Dictionary additionally offers biographical entries on eminent astronomers from Copernicus to Edwin Hubble.
From black gap to white dwarf, and from spiral galaxies to sunlight waves, A Dictionary of Astronomy opens a window at the universe for newbie astronomers in every single place.
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Extra info for A Dictionary of Astronomy (Oxford Paperback Reference)
Where a uniform extended source fills the telescope beam, the antenna temperature is equal to the *brightness temperature of the source. anthropic principle The proposition that the presence of human life is connected with the properties of the Universe. There are various forms of the anthropic principle. The least controversial is the weak anthropic principle, according to which human life occupies a special place in the Universe because it can evolve only where and when the conditions are suitable for it.
Its total mass is over 400 billion solar masses, slightly more massive than our own Galaxy. y. It has almost twice as many globular clusters as our own Galaxy. There are two small close companion galaxies, both of 8th magnitude: the elliptical M32 (NGC 221), and the elliptical/lenticular NGC 205 (sometimes known as M110), plus at least three dwarf spheroidal systems, Andromeda I, II, and III. Andromedid meteors A meteor shower seen in 1872, 1885, 1899, and 1904; also known as the Bielids. Activity resulted from the Earth's passage through debris from Comet *Biela, which is presumed to have disintegrated in the mid-19th century.
Y. 4 in the constellation Andromeda. The Andromeda Galaxy has two arms and is classified as an Sb spiral. Its total mass is over 400 billion solar masses, slightly more massive than our own Galaxy. y. It has almost twice as many globular clusters as our own Galaxy. There are two small close companion galaxies, both of 8th magnitude: the elliptical M32 (NGC 221), and the elliptical/lenticular NGC 205 (sometimes known as M110), plus at least three dwarf spheroidal systems, Andromeda I, II, and III.
A Dictionary of Astronomy (Oxford Paperback Reference) by Ian Ridpath