Star that is larger, brighter, or very hotter than our Sun is further up the H-R diagram towards the blue end of the main sequence while stars that are smaller, or dimmer, or cooler than our Sun are towards the red end of the main sequence.
weighted by the stellar luminosity function, the sun is somewhat above the average temperature or very above the average luminosity. Only four % of main sequence stars are significantly brighter or hotter than the sun. About six % of main sequence stars are about the same brightness or temperature. About ninety % of main sequence stars are significantly dimmer or cooler from the sun. However, most of our galaxy's light (about eighty-eight %) comes from spectral type B stars, even though only 1 star in every thousand stars belongs to this type.
Why are stars so bright in the H-R diagram?
A star might appear bright for many reasons: It can be brighter because it is hotter. For the H-R diagram, astronomers are mainly interested in a star's "intrinsic" brightness, that is, its brightness due to how hot it is actually.
Learn more about the H-R diagram here https://brainly.com/question/5284480
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