FratFiles

• Save Paper

Astronomy 162
1. With for example a prism you can break light up into its separate colors, in a so-called spectrum. When astronomers did this to the light of stars, they found that the stars weren't all the same. Some had more blue light, and others had more red light. Also, thin dark lines (spectral lines) could be seen in the spectra and those weren't the same for all stars, but there were groups of stars that had roughly the same spectra. The astronomers started dividing the stars into classes based on their spectra. They began with class A and worked their way down the alphabet. Some of these classes were later combined so eventually only classes A, B, F, G, K, M, N, O, R, and S remained. The Sun is a star of class G. Many years later it was discovered that most spectral classes depend mainly on the surface temperature of the stars. When you put the classes in descending order of surface temperature, then you get O B A F G K M and that is the order in which they're usually......

View the rest of this paper...

Approximate Word Count: 881
Approximate Pages: 4 (250 words per double-spaced page)

Similar Essays

1. Astronomy
   

   Astronomy. Introduction On ... From the moon to the stars, to the distant planets,
   this in one way or another is astronomy. This paper ...

2. Astronomy
   

   Astronomy. Astronomy is the scientific study of celestial ... development of the universe.
   Astronomy is one of the oldest sciences. Astronomers of early ...

3. Astronomy
   

   Astronomy. One thing us as humans have never been able to fully understand is astronomy. ...
   Astronomy is something that will never be completely understood. ...

4. Ancient Astronomy
   

   Ancient Astronomy. Astronomy has been a source for myriad ideas influencing
   every subject. The stars have existed since the dawn of man. ...

5. Astronomy Vs. Astrology
   

   Astronomy vs. Astrology. Astronomy vs. Astrology This week we were asked to write
   a paper discussing the difference between astronomy and astrology. ...