Starspots are stellar phenomena, so-named by analogy with sunspots. Spots as small as sunspots have not been detected on other stars, as they would cause...

phenomena indirectly observed on stars other than the Sun are commonly called starspots, and both light and dark spots have been measured. The earliest record...

zone Microturbulence Oscillations Radiation zone Atmosphere Photosphere Starspot Chromosphere Stellar corona Alfvén surface Stellar wind Bubble Bipolar...

zone Microturbulence Oscillations Radiation zone Atmosphere Photosphere Starspot Chromosphere Stellar corona Alfvén surface Stellar wind Bubble Bipolar...

zone Microturbulence Oscillations Radiation zone Atmosphere Photosphere Starspot Chromosphere Stellar corona Alfvén surface Stellar wind Bubble Bipolar...

average are known as starspots. Small, dwarf stars such as the Sun generally have essentially featureless disks with only small starspots. Giant stars have...

zone Microturbulence Oscillations Radiation zone Atmosphere Photosphere Starspot Chromosphere Stellar corona Alfvén surface Stellar wind Bubble Bipolar...

zone Microturbulence Oscillations Radiation zone Atmosphere Photosphere Starspot Chromosphere Stellar corona Alfvén surface Stellar wind Bubble Bipolar...

and are very active and variable. There is evidence of large areas of starspot coverage, and they have intense and variable X-ray and radio emissions...

zone Microturbulence Oscillations Radiation zone Atmosphere Photosphere Starspot Chromosphere Stellar corona Alfvén surface Stellar wind Bubble Bipolar...