Blue stars are blue because they're very hot. This sounds wrong, because in the everyday world — for example on weather maps — red means hot and blue means cold. But blue light carries more ...

This pretty sprinkling of bright blue stars is the cluster NGC 2547 ... are galaxies located millions of light-years beyond the stars in the field of view.

But these stars that have been stripped of their hydrogen have been difficult to find because the light they emit is outside ... Drout said to think of the “bluest blue” you can think of ...