Explanation: What could cause a star to have such a large spot? Our Sun itself frequently has sunspots, relatively cool dark magnetic depressions that move across its surface. HD 12545, however, exhibits the largest starspots yet observed. Doppler imaging - the use of slight changes in color caused by the rotation of the star - was used to create this false-color image. The vertical bar on the right gives a temperature scale in kelvins. This giant, binary, RS CVn star, also known as XX Trianguli, is visible with binoculars in the constellation of Triangulum. The starspot is thought to be caused by large magnetic fields that inhibit hot matter from flowing to the surface.

Public Lecture: APOD Editor to speak in New York

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: starspots - pyatno na zvezde Publikacii so slovami: starspots - pyatno na zvezde
Sm. takzhe: Pyatnistaya poverhnost' Betel'geize Pyatennaya aktivnost' pozdnih zvezd Odin iz meteorov potoka Perseid Gigantskoe pyatno na zvezde HD 12545