Labels:text | electronics | screenshot | software | display | web page | website | operating system OCR: STELLAR CLASSIFICATION STARS ARE classified according to their spectral characteristics. A star's spectrum is obtained by separating its radiation into components that show the intensity of radiation of different The Sun wavelengths. This information is used to deduce the star's temperature, color, and chemical makeup. There are Betelgeuse seven main spectral types, each known by a letter of the alphabet. Each type OBAFGKM has subclasses numbered from 0 to 9. BETELGEUSE (TYPE M-2) This red supergiant has a surface temperature of 2,800 ℃ (5,000 ºF) and a diameter 400 times that of the Sun. SAMPLE STAR SPECTRUM Each dark line indicates that radiation of a specific wavelength is being absorbed by a specific chemical element in the star. STAR STAR NAMING BRIGHTNESS COLORS STARS
