PHYS 183 Lecture Notes - Big Bang, Virgo Supercluster
Document Summary
Hubble is one of the most powerful telescopes - it is in space. Galaxies are all different in shape, size and colour but they all contain stars. Earth is the only planet with known & confirmed life. Milky way = our galaxy; collection of approximately 1 billion stars; colour & formation due to starlight. Sun is 2/3 of the way out of the galaxy it is a star. Local group has 2 galaxies (milky way & andromeda) and 20 small galaxies. Local supercluster = collection of galaxies in universe held together by gravity. Planet --> solar system --> galaxy --> local group --> local supercluster --> universe. Black spots on sun are large magnetic fields each bigger than earth. Nebula = cloud of interstellar gas/dust: new stars born out of this material, moving, but we cannot see the movement --> happens over a very long span of time.
