When looking at the constant spectra of a star, How do I tell if the star is low in temp?

Answer 1

You look at where its spectrum peaks energy wise. ~

Answer 2

There is a phenomenon called color temperature, which describes the color of an object that is glowing because it's hot (like a star). It is the same for any glowing hot object. If the blue flame of a stove burner is the same color as the blue of a star, they are the same temperature.

There is a helpful chart here:
http://en.wikipedia.org/wiki/Color_temperature

Answer 3

"Red giants" are low in temperature, compared to "blue dwarfs." You also have to take into account "Doppler Shift," before concluding finally on the color of the star concerned.

Answer 4

Red colored stars are the coldest, blue are the warmest and white are intermediate.

Answer 5

right click on the star, scroll down to properties and go to the temp tab. it should say it there.