comment on its luminosity?
It is the amount of light and other forms of radiant energy it radiates per unit of time, it is determined by its radius and surface temperature.
Star
The luminosity of a star is the amount of light and other forms of radiant energy it radiates per unit of time. It has units of power. The luminosity of a star is determined by its radius and surface temperature. Many stars do not radiate uniformly across their entire surface. The rapidly rotating star Vega, for example, has a higher energy flux (power per unit area) at its poles than along its equator.
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. do they rotate? Yes.
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Star [SEP] Luminosity
The luminosity of a star is the amount of light and other forms of radiant energy it radiates per unit of time. It has units of power. The luminosity of a star is determined by its radius and surface temperature. Many stars do not radiate uniformly across their entire surface. The rapidly rotating star Vega, for example, has a higher energy flux (power per unit area) at its poles than along its equator. Patches of the star's surface with a lower temperature and luminosity than average are known as starspots. Small, "dwarf" stars such as our Sun generally have essentially featureless disks with only small starspots.