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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.
Blue stars are hot because they have higher surface temperatures, around 10,000-40,000 Kelvin, causing them to emit more blue light. Red stars are cooler than blue stars, with temperatures ranging from 2,500-5,000 Kelvin, which results in them emitting more red light. The color of a star is determined by its surface temperature, with hotter stars appearing blue and cooler stars appearing red.
Stars 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.
On 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).
-- 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.
cool stars appear to be red because the temperature is low beteen 1900 digees to 3950 digrees faninhite
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What is the temperatures of stars from hottest to coldest?
The temperatures of stars from hottest to coldest are blue stars, white stars, yellow stars (like our sun), orange stars, and red stars. Blue stars can have surface temperatures exceeding 30,000K, while red stars typically have surface temperatures around 3,000K.
Are blue giants and red dwarfs alike?
Blue giants and red dwarfs are both types of stars, but they are quite different. Blue giants are massive and hot stars that shine brightly, while red dwarfs are smaller, cooler stars that emit a fainter light. Blue giants are more short-lived and evolve faster compared to red dwarfs, which have much longer lifespans.
What happens to the temp of stars as a star changes blue to red?
As a star changes from blue to red, its temperature decreases. Blue stars are hotter and emit more energy in the blue and ultraviolet regions of the spectrum, while red stars are cooler and emit more energy in the red and infrared regions. This change in temperature is due to the evolution of the star and its eventual depletion of fuel.
Is the sun hotter or cooler than red and blue stars?
The sun is cooler than blue stars but hotter than red stars. Blue stars are typically the hottest, followed by white, yellow (like the sun), orange, and then red stars in terms of temperature.
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?
Small cool stars, such as red dwarfs, are typically red or orange in color. This is because their surface temperatures are relatively low, causing them to emit more red and orange light compared to other colors.
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 are the colors of the HR Diagram?
The HR Diagram depicts the relationship between a star's luminosity (brightness) and temperature. Stars appear in different colors on the diagram, ranging from hot blue stars to cool red stars. The main sequence runs from hot, blue stars in the upper left to cool, red stars in the lower right.
Are blue stars cooler than red stars?
No, blue stars are actually hotter than red stars. The color of a star is determined by its temperature, with blue stars being among the hottest and red stars being among the coolest.
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.
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.
What can be said about a red star and a blue star?
A red star is cool whereas a blue star is hot.
What controls the color of a star?
The color of a star is determined by its surface temperature. Hotter stars emit more blue light, while cooler stars emit more red light. This relationship is described by Wien's Law, where the peak wavelength of light emitted by a star is inversely proportional to its temperature.
