Why are blue supergiants so rare?
They are termed ‘blue supergiants’ due to their appearance and the enormous amounts of energy that they can radiate. They are rare – if you take a bunch of stars at random in our Galaxy, less than 0.1% of them will be blue supergiant stars.
How old is a blue giant star?
Blue giant stars are very short-lived Because of their relatively high masses, blue supergiants of the O spectral class will burn through their hydrogen fuel in only about a million years or so, before expiring as supernovas a few million years later.
What’s the biggest blue star?
Alnitak is actually the brightest example of a type O star in the entire night sky. It’s a multiple star system, some 1,250 light years away, with the largest member being a blue supergiant some 33 times the mass of the Sun and with a luminosity of over 200,000 Suns.
How is a blue giant star born?
In the simplest case, a hot luminous star begins to expand as its core hydrogen is exhausted, and first becomes a blue subgiant then a blue giant, becoming both cooler and more luminous.
What turns into a blue supergiant?
Blue supergiants represent a slower burning phase in the death of a massive star. Due to core nuclear reactions being slightly slower, the star contracts and since very similar energy is coming from a much smaller area (photosphere) then the star’s surface becomes much hotter.
Which star has the longest lifespan?
Red dwarf stars make up the largest population of stars in the galaxy, but they hide in the shadows, too dim to be seen with the naked eye from Earth. Their limited radiance helps to extend their lifetimes, which are far greater than that of the sun.
Is a blue Sun Real?
What if we had a blue sun? Though the sun may appear yellow or reddish to the naked eye, it’s actually an ordinary white star. And the blue version released by NASA was made using a specific wavelength of ultraviolet light known as CaK, which is emitted by ionized calcium in the sun’s atmosphere.
Does a blue Sun exist?
What is a blue Sun called?
Blue supergiants are supergiant stars (class I) of spectral type O. They are extremely hot and bright, with surface temperatures of between 20,000 – 50,000 degrees Celsius. The best known example is Rigel, the brightest star in the constellation of Orion.
What is the lifespan of a blue supergiant?
Some scientists have nicknamed blue supergiants the “rock-and-roll” stars, for their tendency to live fast and die young. In exchange for their tremendous size and energy, blue supernovas have short lifespans. They only live around 10 million years, which sounds like a long time …
How big can a blue supergiant star be?
A blue supergiant star can be as big as 1,000 solar masses. So, Here are few interesting facts about blue supergiant stars: Blue supergiant stars are known for the fast stellar winds which blow on their surfaces. However, these winds, although fast, occur sparsely
Why are blue supergiant stars found in spiral galaxies?
Blue supergiant stars are known for the fast stellar winds which blow on their surfaces. However, these winds, although fast, occur sparsely These stars have short lifespans in comparison to most stars; which is why they are found in cosmic structures such as spiral galaxies and open clusters.
Which is hotter a red supergiant or a blue hypergiant?
Stars that are more than 40 times more massive than our Sun, cannot expand into a red supergiant. This is because they burn too quickly and lose their outer layers fast. They will reach the blue supergiant stage, or perhaps yellow hypergiant, before returning to become hotter stars.
Can a blue supergiant star pass through the Yellow Evolutionary Void?
If such a star can pass through the yellow evolutionary void it is expected that it becomes one of the lower luminosity LBVs. The most massive blue supergiants are too luminous to retain an extensive atmosphere and they never expand into a red supergiant.