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The short answer is "hot", but it's all relative.
The surface temperature of stars varies from around 2,500 degrees C, to about 40,000. The sun (a star which appears special to us simply because we happen to be in orbit around it) has a surface temperature is around 6,000 degrees.
All stars in the Universe are relatively hot compared to what we experience on Earth. Most stars are at least a few thousand degrees hot (in Fahrenheit). (Kelvin)
Though, there is a theoretical star called a 'black dwarf'. This theoretical star is said to be negative hundreds of degrees, since it is thought to be a star that burned all possible fuel, and no longer emits heat or light. It is theoretical because the time thought to create this hypothetical star is about the age of the universe now, so it isn't surprising that one hasn't shown up in the records yet.
Theoretically, no, not all stars are hot. Currently, yes, most stars are relatively hot to what we experience on Earth.
There might be a black dwarf in view right now, but since it doesn't emit heat or light, we may never know if one exists or find one at all.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoStars that appear "red" are usually larger and coolerthan yellow or blue ones. The color of a star is fairly representative of the temperature of an equivalent "black-body" radiation source, with blue being the hottest (O class) and red the coolest (M class stars).
Red dwarfs, because of the way they fuse hydrogen, are also red, but much smaller than any of the main sequence stars. The Sun will likely swell into a red giant, with a diameter up to 300 million kilometers, then lose mass and shrink to a white dwarf star.
Wiki User
∙ 13y agoOn a Hertzsprung-Russell diagram, blue stars are considered to be the hottest, reaching temperatures of over 25,000 degrees Kelvin. After blue follows white, then yellow, orange, and red (the coolest of stars).
Wiki User
∙ 11y ago-- The peak wavelength of a star's radiation is proportional to its surface temperature.
(Actually to T4, but the concept is sound.)
-- So a star with a relatively cooler surface radiates a spectrum that peaks at a
lower wavelength than that of a relatively hotter star does.
-- A relatively cooler star might peak in the red, or even in the infrared. And
a relatively hotter star might peak in the blue, or even in the UV.
-- So it's not that blue stars are hot. It's that hot stars are blue.
Wiki User
∙ 14y agoRed stars are hot.The blue star is the hottest of all stars.
Wiki User
∙ 12y agocool stars appear to be red because the temperature is low beteen 1900 digees to 3950 digrees faninhite
Wiki User
∙ 8y agoImmensely hot, our sun is a star.
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Is the sun hotter or cooler than red and blue stars?
The sun is hotter than red stars but cooler than blue stars,
What happens to the temp of stars as a star changes blue to red?
A regular stars temperature cools as it balloons into a red giant. The color shift is evident by the word red because red is the coolest color of heat. The surface of a dying star is cool because it is so much farther away from the core than when it is on the main sequence. After a star sheds its 'skin' the only thing that is left is the white hot core, which will eventually dim to a brown dwarf which is nothing but the cool charred remains of the white dwarf and will give off little to no light.
What tool is helpful for studying the composition of stars?
You can't really use telescopes because there is to much glare. But if you look up at the sky, you can see stars are Blue, And red. Blue stars are large and have short life spans. Red stars are red Supergiants. Stars late in there life cycle.
What color are intermediate mass stars?
blue and red and white
What are Large stars that are bright but not hot are called?
They are red giants.
What does blue and red colors of stars when looking from afar mean?
Blue stars are hot. Red stars are cool.
What color are small cool stars?
The large hot stars are typically called "blue-white" stars or also Blue Giants. Cooler large stars are called Red Giants.
What controls the color of a star?
The color of a star depends on its surface temperature. But hot stars are blue, and medium-hot stars are white, and cool stars are red.
Are blue stars cooler than red stars?
No, blue stars are hotter than red stars. In other words, red stars are cooler. Think of it as fire. The red one is hot, but the blue flame is RAGING hot.
Are red stars hot or cool?
Red stars are cooler than stars of other colors but are still quite hot, which is why the glow red.
What relationship do you see between star color and star temperature?
Blue stars are the hottest, and red stars the coolest. Our sun is orangey, so it's kinda in between blue (hot) and red (cool).
What are the seven types of main sequence stars in the universe?
The seven types of main sequence stars in the universe are O (blue and hot), B (white-blue and hot), A (white and hot), F (yellow-white and medium), G (yellow and medium), K (orange and cool), and M (red and cool).
What do the color of the stars mean?
Star colors tell us how hot the star is. For example a red colored star is cool and a blue colored star is hot.
What does color indicate in stars?
How hot or cool a star is. For example if a star is red, it's cooler. If a star is more blue, it's hotter.
Why do blue white stars not last as long as red stars?
Well blue stars are not as hot as red stars ,so the hotter they are the more they last, just like a red star.
Which stars are red?
The stars that are red are the coolest of all stars temperature wise. The hottest stars are blue, and medium cool stars are white or yellow.
How do blue stars differ from the red stars?
Blue stars are hot, and red stars are cold. You'd think it would be the other way around, but weirdly enough, it's not.
