When stars inter into the red giant stage from the main-sequence stage, supergiant stars can form. The zone of hydrogen burning expands the star outward leaving an inert helium core. This outward movement causes hydrogen fusion in the outer shell of the star making the star thousands of times larger.
Not directly. Supernovas do create the heavier atoms necessary to form planets and stars and do provide the energy that helps to start gravitational collapse for new stars, but a galaxy is not formed simply because a star goes super nova.
A supernova could produce a black hole, and that black hole could attract other stars and over time, it could have collected enough stars to form a galaxy. Our Milky Way Galaxy has a supermassive black hole at it's centre and that would have formed eons ago from a supernova explosion - albeit a very large one.
No. Only about 0.13% of stars are supergiants. The most common type are class M red dwarfs.
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Blue Supergiants and Supergiants
giants, supergiants, dwarfs
No. Only massive stars can become supergiants.
The color of a star is not an indicator of size. While yellow supergiants exist, most yellow stars, such as our sun, fall into the category of yellow dwarf.
The basic luminosity classes are: I for supergiants, III for giants, and V for main-sequence stars.
Blue Supergiants and Supergiants
Red supergiants
No, the largest star known is a Red Hypergiant (vy canis majoris) which are much larger than supergiants. Most of the largest stars are red hypergiants followed by red supergiants.
Giants or supergiants
Both are red supergiants.
they go boom, and make a supernova
Red giants, red supergiants and red hypergiants.
Supergiants are the most massive stars, occupy the top region of Hertzsprung-russell diagram . Supergiants can have 10 to 70 solar masses and luminosity up to hundreds of thousands times the solar luminosity and because of their large masses they have lifespan of few million years and may be less than this value .
Red giants, red supergiants.
giants, supergiants, dwarfs
The anagram is the word "supergiants" (refers to very large stars).
Stars are classified by their type and temperature. Amongst some of the types of stars in our galaxy are white dwarfs, blue giants, and red supergiants. Our own Sun is a yellow dwarf, and like most stars is a main-sequence star.