Star Vocabulary

2. A series of star types to which most stars belong.
4. An increase or decrease in the frequency of sound, light, or other waves as the source and observer move toward or away from each other.
5. A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
7. A small rocky body orbiting the sun.
10. The brightness of a celestial object as it would be seen at a standard distance of 10 parsecs.
13. The magnitude of a celestial object as it is actually measured from the Earth.
15. The displacement of spectral lines toward longer wave lengths in radiation from distant galaxies and celestial objects.
17. A scatter plot of stars that shows the relationship between the magnitudes, luminosity, temperatures, and classifications.

1. The range of wave lengths or frequencies over which electromagnetic radiation extends.
3. A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.
6. The brightness of a celestial object.
8. The theory that the universe began at a single point and then expanded.
9. A celestial object consisting of a nucleus of ice and dust.
11. The displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
12. All existing matter and space considered as a whole; the cosmos.
14. A cloud of gas and dust in outer space.
16. A fixed luminous point in the night sky which is a large, remote incandescent body.