Most of the bright stars in the night sky are giants and supergiants. How can this...
Most of the bright stars in the night sky are giants and supergiants. How can this be, if giants and supergiants make up only 1% of the population of stars? (HINT: there's a difference between everything that's out there, and what you can see.)
Homework Answers
Ans:
Giants and Supergiant stars make only 1℅ of the total population of stars. There are other stars in the night sky which we cannot see.
Stars are classified by their spectra and their temperature. There are seven main types of stars. In order of decreasing temperature, they are classified as, O, B, A, F, G, K, and M.
Giants and Supergiants are 'O' and 'B' type stars. They are very bright and large stars. Thats's why we can see them in the night sky.
'M' type stars are Most sequence stars. They are very common but dim. They make 90% of the whole star population. Sun is an example of main sequenc star.
The rest of the star population makes A, F, G & K type stars. They consits of mainly red dwarfs, neutron stars, white dwarfs etc. They are not visible in the night sky.
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