Red, Orange, or Yellow, I think...
Elliptical galaxies have a red color because the stars in them are older and cooler. An example of an elliptical galaxy is Maffei 1.
red stars are cooler than the sun
The large hot stars are typically called "blue-white" stars or also Blue Giants. Cooler large stars are called Red Giants.
According to Wien's law, red stars are cooler than blue stars. This concept can be easier to understand using a light bulb. For example, when you turn off a light, the temperature of the bulb will decrease and you will notice the bulb turning red. The cooler light becomes, you will notice the obvious change in brightness and the color shifts towards red and the intensity is lowered.
The relationship is that the color is an indication of the star's surface temperature. For example, red stars are cooler, while blue stars are hotter. You can find more details in the Wikipedia article "Stellar classification".
blue or white
The hotter they are, the bluer they are, the cooler they are, the redder they are.
Elliptical galaxies have a red color because the stars in them are older and cooler. An example of an elliptical galaxy is Maffei 1.
Red stars are cooler than blue stars
Elliptical galaxies have a red color because the stars in them are older and cooler. An example of an elliptical galaxy is Maffei 1.
The color of stars determines temperature. Red/brown stars are cooler, blue stars are hotter, and yellow stars are in between. Brightness also has some correlation with color. Both are based on many varying factors however.
Hot stars are usually white or blue, while cooler stars are either yellow or red.
Colder stars emit red light. Hot stars emit large amounts of green light with small amount of red and blue light, which balances out to a white color in human eyes.
red stars are cooler than the sun
The large hot stars are typically called "blue-white" stars or also Blue Giants. Cooler large stars are called Red Giants.
According to Wien's law, red stars are cooler than blue stars. This concept can be easier to understand using a light bulb. For example, when you turn off a light, the temperature of the bulb will decrease and you will notice the bulb turning red. The cooler light becomes, you will notice the obvious change in brightness and the color shifts towards red and the intensity is lowered.
The sun is hotter than red stars but cooler than blue stars,