relative sunspot number
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relative sunspot number — Astron. See Wolf number … Useful 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
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
List of radio propagation topics — This is a list of radio propagation terms. NOTOC A a index A index aa index active prominence active prominence region (APR) active region active surge region (ASR) active dark filament (ADF) AE index Air Force Geophysics Laboratory (AFGL) arch… … Wikipedia
ZPRSN — Zurich Provisional Relative Sunspot Number Astronomy … Acronyms
ZPRSN — Zurich Provisional Relative Sunspot Number {Astronomy} … Acronyms von A bis Z
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
Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun … Wikipedia
