Cosmology Vocabulary

2. Idea that expansion due to dark energy will continue and that eventually everything will be ripped apart including stars, galaxies, and even atoms
4. Idea that expansion will eventually slow due to gravity and then reverse and that all the universe will collapse back together into a single point; has been disproved as the expansion force of dark energy is greater than the contraction force of gravity
10. The mysterious force that is accelerating expansion of the universe; this makes up 65% of the universe
11. Anything that takes up space and has mass
15. Idea that due to expansion, galaxies and stars will become so distant from each other that no other light can be seen. The universe will be a cold, dark, lonely place
17. A ratio of 75% hydrogen atoms and 25% helium atoms is measured throughout the universe which matches the prediction from the big bang theory
19. The extremely rapid expansion of the universe outward from the singularity point. This happened faster than the speed of light.
20. Extremely bright objects in the universe, but also very far from earth; object may be light emitted from the "accretionary disc" around a super-massive black hole

1. The leftover heat energy from the Big Bang that is visible in every part of the universe
3. The distance between identical points in a waveform signal
5. A Doppler effect of light where the wavelength is stretched out, shifting it toward the red end of the spectrum
6. A fundamental force of the universe that any object with mass will exert a gravitational pull on any other object with mass
7. The idea that the universe always existed in much the same size and composition as we now observe it; this theory was replaced by the big bang theory
8. The science which studies how the universe began and how it has changed over time
9. The rate at which something occurs or is repeated over a particular period of time
12. An infinitely small, infinitely dense, and infinitely hot point from which the universe expanded
13. Galaxies are moving away from Earth at a rate proportional to their distance from Earth, meaning distant galaxies are receding faster than closer galaxies
14. The generally accepted theory to explain the origin of the universe, which states that the universe formed during a single event in which all matter and energy suddenly expanded from an extremely small point
16. The magnitude of the wave height
18. Matter or mass in the universe that we cannot see directly and can only see its gravitation effect on stars and galaxies