Suppose you see two stars: a blue star and a red star. Which of the following can you conclude about the two s

Answer 1

There are lots of different possibilities. However, it's probably _not_ a doppler effect. It's true that when a star moves towards you, it looks bluer and when it moves away it looks redder. However, they would have to be moving heck of fast for you to be able to see a color change with your eye. With spectroscopy, sure, then it could be doppler shift.

The blue star is a main sequence star. The red star is probably not a main sequence star. The blue star is hotter and the red star is cooler. The blue star is a larger than average (larger than the sun) main sequence star. The red star is much larger than it was when it was younger, but you can't know if it is bigger or smaller or more massive or less massive than the blue star based just on color. If you knew that the two stars were the same age, then you could use that fact to determine that the red star is at least a bit more massive than the blue star.

Answer 2

Many things can be "concluded" about the differences between a red star and a blue star. First of all, you can actually see this very thing through your telescope (if you own one) when looking at the star named "Albireo", or otherwise know as "Beta Cygni", which is the double-star which marks the foot of the Northern Cross. It's one of the most beautiful double-stars to view through a telescope. The "blue" star is a star that is much hotter than a red or orange star...and any Astronomer who is serious about astronomy, is familiar with this double-star, but is also aware of the fact that the color of a star is directly related to the stars' heat and temperature. The "blue" star is much hotter than the "red or orange" star. The "size" of a star isn't relative. But it's common knowledge that a blue or white star is much hotter than an orange or even cooler yet, "red" star.

Answer 3

You gave no possible conclusions, so I will supply some. You can conclude that the blue star is probably hotter than the red one. If you can perform a spectroscopic analysis of the light, you can tell a lot more: whether the stars are moving toward or away from you; what elements are in the star's atmosphere and hence what its type, intrinsic intensity, size, and distance are.

Answer 4

Looks like you didn't complete the question. Anyways, it has to do with something called the Doppler Effect. A red star is moving away from you and a blue star is moving towards you. This is how Hubble concluded that the universe was expanding.

Answer 5

The blue star's light hasn't turned red yet, so it's sun hasn't yet become a red dwarf like the red star. Also, nebular interference, magnetic interference from black holes, and other visual impedences can determine the color of a star.

Additionally, the star's wooble can affect it's color, and is typical before a star goes supernova. All this is theory, like most things about the universe.

Answer 6

The blue is hotter than the red, not necessarily smaller than the red. It could also be a doppler shift, one getting closer to us and one getting further. The Blue star is also most likely younger than the red star.

Answer 7

first off where are the other stars. OK seriously the blue star is moving towards you. called a blue shift. the red star is moving away from you and is called a red shift.

Answer 8

One is moving away fom you and one is moving towards you?

You are wearing odd lensed glasses?

You are looking out of a stained glass window through different coloured panes?

Answer 9

the red is probably larger, cooler, and closer than the blue one.

Answer 10

they can make a purple star