do they rotate?
Yes.
Star
The rotation rate of stars can be determined through spectroscopic measurement, or more exactly determined by tracking their starspots.
where does the sun's luminosity come from Nuclear fusion reactions in its core. can you explain this term you mentioned just now? It is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles. do this process is experienced by any other planetary body? Stars. in which unit is it measured? Joule. can you mention any one of its characteristic? Luminosity, size, evolution, lifespan, and its eventual fate. what is meant by its binary form? If stars in a binary system are sufficiently close, when one of the stars expands to become a red giant it may overflow its Roche lobe.
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Star [SEP] Rotation
The rotation rate of stars can be determined through spectroscopic measurement, or more exactly determined by tracking their starspots. Young stars can have a rotation greater than 100 km/s at the equator. The B-class star Achernar, for example, has an equatorial velocity of about 225 km/s or greater, causing its equator to bulge outward and giving it an equatorial diameter that is more than 50% greater than between the poles. This rate of rotation is just below the critical velocity of 300 km/s at which speed the star would break apart. By contrast, the Sun rotates once every 25–35 days depending on latitude, with an equatorial velocity of 1.93 km/s.