NATS 1880 Lecture Notes - Lecture 12: Vacuum Energy, Dark Energy, Dark Matter
2 Nov 2017
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Document Summary
Dark matter cannot be seen but does have a gravitational influence. The power that holds stars and other stuff together. It"s the reason that stuff does not fall behind from galaxies and stick to them. Dark energy (vacuum energy) cannot be seen but show itself as a repulsive force - this energy push everything apart from each other. As a result everything is getting farther from each other in space. The idea that the distance between galaxies are growing over time. The process in which two smaller nuclei slam together and make one larger nucleus. The remnant radiation from the big bang that we detect using radio telescopes sensitive to microwaves. The matter, gas and radiation that exists in the space between the star systems in a galaxy. Universe is the sum total of all matter and energy. Strong observational evidence shows that the universe was once compressed into a very hot, very dense point.
