Astronomy

1. an icy, small Solar System body
4. the shift in wavelengths of light toward the blue end of the spectrum as an object moves toward us in space
5. a measure of the total amount of energy radiated by a star or other celestial object per second.
7. graph in which the absolute magnitudes of stars are plotted against their spectral types
9. what happens when a star has reached the end of its life and explodes in a brilliant burst of light
13. an increase in the frequency of sound, light, or other waves as the source and observer move toward each other.
15. a diagonal band on the Hertzsprung Russell diagram containing about 90% of all known stars
16. how astronomers explain the way the universe began
17. massive self-luminous celestial body of gas that shines by radiation

2. the full range of electromagnetic waves
3. A huge collection of stars,gas,dust help together by gravity
6. The actual mount of light a star gives off
8. the brightness of an object as it appears to an observer on Earth
10. is everything, includes all of space, and all the matter and energy that space contains
11. small, rocky objects that orbit the Sun
12. he wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum
14. an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars