4th 6Wks Astronomy Vocabulary

4. what many stars expand into when they run out of hydrogen to fuse into helium
5. a celestial object, thought to be a rapidly rotating neutron star, that emits regular pulses of radio waves and other electromagnetic radiation at rates of up to one thousand pulses per second
7. the intrinsic brightness of a celestial object
8. a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures
10. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
11. a star that shows a sudden large increase in brightness and then slowly returns to its original state over a few months
12. when a celestial body passes directly between a larger body, like a star, and the observer
14. an optical instrument designed to make distant objects appear nearer
15. a telescope in which a mirror is used to collect and focus light
17. a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass
18. the science class you should consider recommending to all your friends
19. the name of the space telescope mission that has found most of the planets using the transit method

1. A celestial object consisting of an extremely dense mass of neutrons, formed at the core of a supernova
2. a series of star types to which most stars belong
3. a telescope which uses a converging lens to collect light
5. a ball of matter that is contracting to become a star
6. a type of telescope that uses light outside the visible spectrum to find cooler stars or those that are hidden by dust clouds
9. the degree of brightness of a star as it appears to us
13. the study of the interaction between matter and electromagnetic radiation
16. a region of space having a gravitational field so intense that no matter or radiation can escape