sunspot period


Useful english dictionary. 2012.

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  • sunspot cycle — noun or sunspot period : the time between maxima in the varying numbers of sunspots averaging about 11 years but sometimes being many years shorter or longer * * * Astron. the cycle, averaging in duration slightly more than 11 years, in which the …   Useful english dictionary

  • sunspot maximum — sunspot maximum, the period during the sunspot cycle in which sunspots are most frequent …   Useful english dictionary

  • sunspot minimum — sunspot minimum, the period during the sunspot cycle in which sunspots are least frequent …   Useful english dictionary

  • Sunspot — A sunspot is a region on the Sun s surface (photosphere) that is marked by intense magnetic activity, which inhibits convection, forming areas of reduced surface temperature. They can be visible from Earth without the aid of a telescope. Although …   Wikipedia

  • Henry Helm Clayton — (* 12. März 1861 in Murfreesboro, Tennessee; † 26. Oktober 1946 in Canton, Massachusetts) war ein US amerikanischer Meteorologe. Inhaltsverzeichnis 1 Leben und Leistung 2 Schriften (Auswahl) …   Deutsch Wikipedia

  • sun — sunlike, adj. /sun/, n., v., sunned, sunning. n. 1. (often cap.) the star that is the central body of the solar system, around which the planets revolve and from which they receive light and heat: its mean distance from the earth is about 93… …   Universalium

  • Solar variation — Solar variations are changes in the amount of solar radiation emitted by the Sun. There are periodic components to these variations, the principal one being the 11 year solar cycle (or sunspot cycle), as well as aperiodic fluctuations. Solar… …   Wikipedia

  • David Cass — For the British footballer, see David Cass (footballer). David Cass Born January 19, 1937(1937 01 19) Honululu, Hawai …   Wikipedia

  • Maunder Minimum — The Maunder minimum in a 400 year history of sunspot numbers The Maunder Minimum (also known as the prolonged sunspot minimum) is the name used for the period roughly spanning 1645 to 1715 when sunspots became exceedingly rare, as noted by solar… …   Wikipedia

  • Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …   Wikipedia

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