[PHY 110] - Final Exam Guide - Comprehensive Notes fot the exam (73 pages long!)

• School: University of Miami
• Department: Physics
• Course: PHY 110
• Professor: Gundersen Joshua

Document Summary

Stars lower down are running parallel to the horizon. All the objects are just going around in circles parallel to the horizon over the course of time: the earth is tilted on its side, the earth"s north pole is always titled toward the north star. Earth"s magnetic field connects with the earth near the planet"s north and south poles: as these high-speed charged particles collide with atoms in the upper atmosphere, they excite the atoms to high energy levels. The atoms then emit visible light as they drop down to their ground states, like the excited gas items in neon lights. Their absorption lines can occur only if these stars have surface temperatures above 25,000 k: m stars are the coolest stars. These ancient stars are thus said to be metal poor: population ii stars: the first stars were metal poor, the early universe consisted almost exclusively of hydrogen and helium atoms, with almost no heavy elements (metals).