Universe Part I

2. a particle of light
6. a star that has collapsed under gravity and its protons and electrons have formed neutrons
8. theory that states the Universe began 13.8 b.y.a. with a tremendous inflation
9. study of the origin, properties, and evolution of the Universe
10. object so massive and dense that not even light can escape its gravity
11. coming together and cohesion of matter under the influence of gravitation to form larger bodies
15. two or more atoms form a new atom under high pressure and temperatures
16. a rapidly spinning neutron star that sends out pulses of radio and visible radiation

1. a system that consists of a star, its planets, and other bodies orbiting that star
3. the oldest structures in the Universe; huge collections of matter around a black hole
4. a huge explosion in which a large star collapses and throws its layers into space
5. collection of stars, dust, gas, and dark matter that orbit a central gravity point
7. the point where the Universe was infinitely small before the Big Bang
12. Universe's energy continues to become less and less available to do work
13. a space cloud of dust, hydrogen, helium and other ionized gases
14. to energize matter by adding or removing electrons