What is the difference between blue star and red star?

Blue stars tend to be the brightest, and red stars the dimmest. Apart from the temperature and brightness, the colour also usually —with the same qualification— indicates the size of a star: the hottest and most energetic blue stars are usually bigger and the red ones smaller.

What does a blue star mean in space?

The color of a star comes from its temperature. The coolest stars appear red, while the hottest stars are blue. And for a star, the only thing that defines the temperature of a star is its mass. Blue stars are stars that have at least 3 times the mass of the Sun and up.

Which is hotter a red star or a blue white star?

Yellow stars are hotter than red stars. White stars are hotter than red and yellow. Blue stars are the hottest stars of all. Most stars are so much farther from us that they are not as bright as the sun.

Why is a red star cooler than a blue star?

The temperature of a blue star is 40000 Kelvin degrees, the temperature of a red star is 3500 Kelvin. Answer 5: Red stars are cooler. They are red because they emit red light, which is lower in energy than blue light.

How hot is a red star?

3,500 K
Red stars are cooler than the sun, with surface temperatures of 3,500 K for a bright red star and 2,500 K for a dark red star. The hottest stars are blue, with their surface temperatures falling anywhere between 10,000 K and 50,000 K.

What are the hottest stars called?

blue hypergiant stars
But the hottest known stars in the Universe are the blue hypergiant stars. These are stars with more than 100 times the mass of the Sun. One of the best known examples is Eta Carinae, located about 7,500 light-years from the Sun.

What are red stars called?

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses ( M ☉)) in a late phase of stellar evolution. The appearance of the red giant is from yellow-orange to red, including the spectral types K and M, but also class S stars and most carbon stars.

What is the name of a red star?

Antares, also called alpha Scorpii, is a prominent star in Scorpius (the Scorpion), a constellation that is visible in the southern night sky of most locations in the Northern Hemisphere.