The equivalent of a sunspot on another star

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  • Starspot — Starspots are equivalent to sunspots but located on other stars. Spots the size of sunspots are very hard to detect since they are too small to cause fluctuations in brightness. Observed starspots are in general much larger than those on the Sun …   Wikipedia

  • starspot — starˈspot noun An area of relative darkness on the surface of a star • • • Main Entry: ↑star …   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

  • Star — For other uses, see Star (disambiguation) …   Wikipedia

  • T Tauri star — Drawing of a T Tauri star with a circumstellar accretion disc …   Wikipedia

  • 12 Ophiuchi — Starbox begin name=12 Ophiuchi Starbox observe epoch=J2000 ra=RA|16|36|21.4493 dec=DEC| 02|19|28.501 appmag v=5.76 constell=Ophiuchus Starbox character class=K2 V b v=0.82 u b=0.50 variable=BY Draconis Starbox astrometry radial v= 15.4 prop mo ra …   Wikipedia

  • Stellar magnetic field — A stellar magnetic field is a magnetic field generated by the motion of conductive plasma inside a main sequence (hydrogen burning) star. This motion is created through convection, which is a form of energy transport involving the physical… …   Wikipedia

  • BY Draconis — Starbox begin name=BY Draconis AB Starbox observe epoch=J2000 ra=RA|18|33|55.7728cite web url=http://simbad.u id?protocol=html Ident=BY+Dra title=SIBMAD query result: V* BY Dra Variable of BY Dra type publisher=Centre de… …   Wikipedia

  • Portal:Star — Shortcut: P:STR The Star Portal Wikipedia portals: Culture Geography Health History …   Wikipedia

  • Apparent magnitude — Asteroid 65 Cybele and 2 stars with their magnitudes labeled The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere.… …   Wikipedia

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