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Large stars - such as red giants, or supergiants - usually have a relatively low surface temperature.
Wiki User
∙ 10y ago
Wiki User
∙ 12y agoBrightness is based on distance, so is ignored.
Most large cool stars are red giants/supergiants and even hypergiants.
Wiki User
∙ 14y agoThere are a very great number of stars that are cooler and brighter than the Sun. The Milky Way alone contains perhaps 400 BILLION stars, and there are billions of other galaxies.
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∙ 11y agored giant
Wiki User
∙ 14y agosupergiant
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Why do cool stars have greater luminosity than our sun?
They do not necessarily have greater luminosity, it depends on their size. Betelgeuse is cooler and brighter; a red dwarf is cooler and less bright.
Explain how the Sun is different from other stars on the main sequence?
It isn't different. The sun is hotter and brighter than the average main sequence stars, but it is within what is considered normal. There is nothing extraordinary about the sun itself.
Do the stars on the main sequence illustrate the mass-luminosity relationship?
Luminosity depends directly on mass because more massive main-sequence stars do not need to graviationally contract as far to reach fusion temperatures, and so they have a larger volume and contain a much larger amount of light energy, which diffuses out and generates a higher luminosity, very roughly in proportion to the higher volume.
How bright is Gemini compared to the sun?
Gemini is a constellation, a pattern of stars in the sky. Most of the stars in Gemini are larger and brighter than the Sun, which is only of medium size and brightness.
Why is the sun called a main sequence star?
The main sequence is a line on a Hertzsprung-Russell diagram, on which every star is placed on a graph of absolute magnitude against surface temperature. Each star produces a dot on the diagram, and all the main sequence stars fall roughly on a straight line. On the main sequence the hot bright stars are on the top left and the cooler dimmer red stars are on the lower right. The Sun is just above halfway up.
Its Cooler larger and brighter than most main sequence stars?
red giant
How does the HR diagram explain why some smaller cooler stars are brighter than larger hotter stars?
In terms of absolute magnitude, a larger hotter star will necessarily be more luminous than a smaller cooler star. However, if a smaller cooler star is much closer to us than a larger hotter star, it may appear to be brighter. None of this has anything to do with the HR diagram.
What are the stars in the main sequence?
The smallest stars in the main sequence are the stars with cooler surface temperatures.
are smaller stars brighter?
No. Larger stars are generally brighter. Blue giants are the brightest stars while red dwarves are the faintest.
What happens to the brightness of main sequence stars as they get hotter?
As they get hotter, they usually get brighter.
Are stars really little moons?
No. Stars are much larger than planets or moons. Stars are suns, some larger and brighter than our own.
Are blue stars more luminous?
Blue stars are more luminous than other main sequence stars but not necessarily brighter than giant and supergiant stars.
The large cool stars found at the upper right of the H-R diagram are stars?
Yes, They are cooler, yet larger. The larger the star, the higher on the diagram, and the cooler, the further right.
How do star are more brighter than other stars?
Stars are more brighter than other stars because they have different characteristics that affect their luminosity. Luminosity is the amount of energy that a star emits per unit of time. It depends on the star's size, temperature, and distance from the observer. Some of the factors that make stars more brighter than other stars are: Size: Larger stars have more surface area and can emit more light than smaller stars. Temperature: Hotter stars have higher energy and can emit more light than cooler stars. Distance: Closer stars appear brighter than farther stars because their light has less space to travel and lose intensity.
Are stars cooler than the sun brighter or dimmer?
a sun is a star so it would be considered both dimmer .
Why do cool stars have greater luminosity than our sun?
They do not necessarily have greater luminosity, it depends on their size. Betelgeuse is cooler and brighter; a red dwarf is cooler and less bright.
Is a hot star blue and fainter or blue and brighter?
It is brighter because it is emitting more gasses at a faster rate than other sized main sequence stars.
