Which kind of star is hottest?

O stars are the hottest, with temperatures from about 20,000K up to more than 100,000K. These stars have few absorption lines, generally due to helium. These stars burn out in a few million years. B stars have temperatures between about 10,000 and 20,000K.

Which is hotter red or blue star?

The surface temperature of a star determines the color of light it emits. Blue stars are hotter than yellow stars, which are hotter than red stars.

Which type of star is coolest?

The spectral sequence is also a colour sequence: the O- and B-type stars are intrinsically the bluest and hottest; the M-, R-, N-, and S-type stars are the reddest and coolest.

What star is hot and bright?

Most stars in the solar neighborhood are fainter and cooler than the Sun. There are also a handful of stars which are red and very bright (called red supergiants) and a few stars that are hot, but very faint (called white dwarfs).

Which star has the highest temperature?

Sirius, with its surface at a temperature of 18,000 degrees F, is so hot that it glows blue.

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Which color star is hottest?

White stars are hotter than red and yellow. Blue stars are the hottest stars of all. Stars are not really star-shaped.

What is the hottest color?

No matter how high a temperature rises, blue-white is the hottest color we are able to perceive.

Which star is least hottest?

Spectral types are named with a letter. The seven main types are M, K, G, F, A, B and O. M stars are the coldest stars and O stars are the hottest.

Which star is hotter Mira or the sun?

Mira is hotter and bluer but intrinsically fainter than the Sun.

Which star is very similar to the sun?

At a distance of twelve light years from Earth and visible to the naked eye in the evening sky, Tau Ceti is the closest single star that has the same spectral classification as our Sun.

Which star is most luminous?

To astronomers, the word luminous refers to a star’s intrinsic brightness. Sirius, in the constellation Canis Major the Greater Dog, looks extraordinarily bright in Earth’s sky. It’s our sky’s brightest star.

What is the biggest star?

UY Scuti

Why do stars twinkle?

As light from a star races through our atmosphere, it bounces and bumps through the different layers, bending the light before you see it. Since the hot and cold layers of air keep moving, the bending of the light changes too, which causes the star’s appearance to wobble or twinkle.

What color is the coldest star?

Stars have different colors, which are indicators of temperature. The hottest stars tend to appear blue or blue-white, whereas the coolest stars are red.

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Is a neutron star hotter than the sun?

A: A neutron star is born very hot (leftover heat from when the star was still “normal” and undergoing nuclear reactions) and gradually cools over time. For a 1 thousand to 1 million year old neutron star, the surface temperature is about 1 million Kelvin (whereas the Sun is 5800 K).

What is the hottest planet in the universe?

Venus is the hottest planet in the solar system. Although Venus is not the planet closest to the sun, its dense atmosphere traps heat in a runaway version of the greenhouse effect that warms Earth.

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