Star Classifications

In the early 1900's, American astronomer Annie Jump Cannon classified over 500,000 stars in her lifetime using her specific system in which she gave each star a specific letter and number based on its color and luminosity. Here, at the GMW, we use a modified, simpler version of Jump Cannon's system primarily to understand just the color and general size of given stars. This system is as follows:
 * Type O: Blue Supergiant
 * Type B: Blue Giant
 * Type A: White/Bluish-White
 * Type F: White
 * Type G: Yellow
 * Type K: Yellow/Orangish
 * Type M: Red Giant/Red Supergiant
 * Type L: Red Dwarf