ASTR 3 Chapter Notes - Chapter 1 and 2: List Of Largest Galaxies, Millisecond Pulsar, Usable Fuel
28 Aug 2016
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Chapter 1 - a modern view of the universe. Solar system - consists of the sun, the planets and their moons, and countless smaller objects (like rocky asteroids and icy comets) Big bang: occurred 14 billion years ago as observed through the rate of expansion: current data shows that galaxies are expanding, meaning that at some point they had to be closer together, implying the big bang. Ecliptic plane - a at plane that the earth rotates on. !1: our axis tilt is 23. 5 from a line perpendicular to the ecliptic plane and our tilt points us directly towards the north star (polaris) Discoveries by edward hubble (creator of the hubble telescope: virtually every galaxy outside the local group is moving away from us, the more distant the galaxy, the faster it appears to be racing away. It crosses the celestial equator at a 23. 5 degree angle.
