Download e-book for iPad: A Dictionary of Astronomy (Oxford Paperback Reference) by Ian Ridpath

By Ian Ridpath

ISBN-10: 0192115960

ISBN-13: 9780192115966

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, updated entries, this dictionary cuts a transparent direction throughout the maze of complicated technical language, providing complete, transparent definitions drawn from all elements of astronomy. Compiled via Ian Ridpath, a fellow of the Royal Astronomical Society, and a professional workforce of individuals, A Dictionary of Astronomy comprises the latest entries from astrophysics and cosmology to galaxies and time.

Here are succinct definitions for the large Bang thought, 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 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 sunlight waves, A Dictionary of Astronomy opens a window at the universe for newbie astronomers in all places.

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Extra resources for A Dictionary of Astronomy (Oxford Paperback Reference)

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The overall range of brightness of a variable star: the difference between its maximum and minimum magnitudes. 2. e. half the peak-to-peak value. Am star A star of spectral type A whose spectrum additionally contains very strong metallic lines (hence the suffix 'm') more typical of type F. Am stars are usually members of close binary systems. They rotate more slowly than normal A stars, thereby allowing some elements to sink and some to rise in their atmospheres, and this produces the observed abundance anomalies.

Or more) and somewhat higher luminosity. The AI Velorum stars may be the older of the two groups. They are sometimes referred to as dwarf Cepheids. AJ Abbr. for *Astronomical Journal. 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.

428BC) Greek philosopher, born in modern Turkey. In his cosmogony, a vortex developed in the primordial Universe, causing dense, wet, dark, and cold matter to fall inwards and form the Earth, while rarefied, dry, light, and hot matter was forced outwards. The Sun, Moon, and stars were torn from the Earth by friction. His claim that the Sun is a red-hot stone allegedly led to his prosecution for impiety and banishment from Athens. Anaxagoras seems to have known the true cause of eclipsesthat they are caused by the blocking off of light from the Sun.

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