Download Dictionary of Astrononmy (1998)(1st ed.)(en)(532s) by Ian Ridpath PDF

By Ian Ridpath

Astronomy is increasing virtually as swiftly because the universe itself, and the proliferating clinical jargon can occasionally baffle even the main committed beginner. Now, in a few 4,000 concise, up to date entries, this dictionary cuts a transparent direction in the course of the maze of complicated technical language, delivering complete, transparent definitions drawn from all elements of astronomy. Compiled by means of Ian Ridpath, a fellow of the Royal Astronomical Society, and knowledgeable crew of participants, A Dictionary of Astronomy includes the newest entries from astrophysics and cosmology to galaxies and time.Here are succinct definitions for the massive Bang idea, comets, eclipses, Magellanic Clouds, Mars, quasar, relativity, and variable stars. Entries on telescopes and different measuring units, observatories, area missions, and lately named sunlight method items express 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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Additional resources for Dictionary of Astrononmy (1998)(1st ed.)(en)(532s)

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More than 2 tonnes of CV3-type material were collected, the largest piece weighing 110 kg. 6 billion years, making it some of the oldest primordial planetary material to be recovered. html (1 of 2) [9/29/2007 7:47:10 PM] Document all-sky camera A camera with a field of view that includes all, or nearly all, of the sky on one frame. The images from such cameras are circular, and have the zenith at the centre and the horizon around the edge. They are used in particular for meteor and fireball 'patrols'.

Almucantar A small circle on the celestial sphere that is parallel to the horizon. All objects on an almucantar are at the same altitude at a given time. 7. y. away. 7, the middle star of the belt of Orion. y. away. Alnitak The star Zeta Orionis, one of the three stars of the belt of Orion. y. 2. a Symbol for *right ascension. Alpha Capricornid meteors A meteor shower of generally low activity (maximum ZHR 10) between July 15 and August 20. There appear to be several maxima, the principal one around August 2.

Html (2 of 2) [9/29/2007 7:47:12 PM] Document Page 14 aluminizing The process of depositing a reflective aluminium coating on a mirror, the successor to *silvering. The mirror is placed in a vacuum chamber and the aluminium is vaporized by heating. With no air molecules to collide with, the aluminium atoms travel directly to the mirror, coating it with a thin, even layer (about 100 nm thick). Subsequent layers of other materials, such as silicon dioxide, may then be deposited in a similar way to protect the coating.

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