universe vocabulary

2. a tool used to collect light from stars and separate the colors in the light.
8. a phenomenon which occurs when a star or galaxy is moving away from the earth and its wavelengths emitted are stretched out due to the doppler effect.
13. a brightness scale used to measure the bright of a star would be if it were seen from a standard distance.
16. a collection of large and small bodies that orbit our central star the sun
17. the distance the light travels in one year
20. a highly magnetized rotating neutron star that emits a beam of electromagnetic radiation.
22. all of the different wavelengths and frequencies of electromagnetic radiation from radio waves to gamma rays.

1. the brightness of a star as seen from earth.
3. the spin of a body on its axis.
4. a graph that shows the relationship between a stars surface temperature and absolute magnitude.
5. the hot dense dim core of matter remains from the collapse of a low mass star.
6. the electromagnetic radiation left over from the formation of the universe.
7. the theory that all matter and energy in the universe was compressed into an extremely small volume.
9. a large celestial body that is composed of gas and that emits light the sun is a typical star.
10. a relatively large spherical body that orbits a star.
11. the actual brightness of an object such as a star as compared to sun.
12. the region on the H-R diagram where stars spend most of their lives; it has a diagonal pattern.
14. a large cloud of dust and gas in interstellar space; a region in space where stars are born.
15. the space and all the matter and energy in it.
18. a collection of stars, dust, and gas bound together by gravity.
19. an observed change in frequency or wavelength when the source is moving with respect to the observer.
21. the core of a supernova that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons.
23. the motion of a body that travels around another body in space; one trip along an orbit.