Question

1. how do scientists classify stars ? (1point )

A. by size , distance , and color

b. by size , distance, and brightness

c. by color , brightness, and distance

d. by size , brightness, and temperature

Answer 1

Astronomers classify stars by color using a series of letters: O, B, A, F, G, K and M.Astronomers use another roman numeral at the end of the spectral letter to define the size and luminosity of a star. They range from I supergiants to V dwarfs, or main sequence stars. Because our Sun is a main sequence star, it would get the V designation.


Read more: http://www.universetoday.com/24633/star-classification/#ixzz2v0EwbD6U

Answer 2

hope this helps..:)

Answer 3

oh! so its b

Answer 4

i think a...distance colour and size

Answer 5

but i wonder the differences of brightness, colour and temperature cus like @shrutipande9 says, there are 8 "colours" but the colour actually came from the temperature of the star
like the red/ yellow star is colder than the blue one

Answer 6

ohh yes...u r right i guess....srry i m not good at this..but i tried to find an ans..:)

Answer 7

I'm just saying cus I'm not sure what are the differences and what does it mean by "distance"? the distance from Earth to the star?