sunspot number


sunspot number

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Universalium. 2010.

Look at other dictionaries:

  • sunspot number — noun : an arbitrary numerical value that is used to describe the sun s spottedness, is the number of individual spots plus 10 times the number of disturbed regions, and depends upon the instrumental equipment and personal equation of the observer …   Useful english dictionary

  • relative sunspot number — Astron. See Wolf number. * * * …   Universalium

  • relative sunspot number — Astron. See Wolf number …   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

  • Sunspot equilibrium — In economics, a sunspot equilibrium is an economic equilibrium where the market outcome or allocation of resources varies in a way unrelated to economic fundamentals. In other words, the outcome depends on an extrinsic random variable, i.e. on… …   Wikipedia

  • sunspot — sunspotted, adj. sunspottedness, n. /sun spot /, n. one of the relatively dark patches that appear periodically on the surface of the sun and affect terrestrial magnetism and certain other terrestrial phenomena. [1805 15; SUN + SPOT] * * * Cooler …   Universalium

  • sunspot — /ˈsʌnspɒt / (say sunspot) noun 1. one of the relatively dark patches which appear periodically on the surface of the sun, and which have a certain effect on terrestrial magnetism and other terrestrial phenomena. Their appearance is spasmodic but… …   Australian English dictionary

  • Wolf number — The Wolf number (also known as the International sunspot number, relative sunspot number, or Zürich number) is a quantity which measures the number of sunspots and groups of sunspots present on the surface of the sun.The idea of computing sunspot …   Wikipedia

  • wolf number — ˈwu̇lf , ˈvȯlf noun Usage: usually capitalized W Etymology: after Rudolf Wolf died 1893 Swiss astronomer : sunspot number * * * /woolf/; Fr. /vawlf/, Astron. a number indicating the degree of sunspot activity on the sun as a factor of observer… …   Useful english dictionary

  • Wolf number — /woolf/; Fr. /vawlf/, Astron. a number indicating the degree of sunspot activity on the sun as a factor of observer idiosyncrasies, the number of sunspot groups, and the number of individual sunspots. Also called relative sunspot number, sunspot… …   Universalium


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