Earth Sciences 1086F/G Lecture Notes - Lecture 1: Nebular Hypothesis, Shape Of The Universe, Dark Energy

• School: Western University
• Department: Earth Sciences
• Course: Earth Sciences 1086F/G
• Professor: Elizabeth Webb

Document Summary

Introduction: big bang created space and time; leading theory of how the universe originated, general process of science: observation hypothesis theory law (possibly, natural processes proceed from simple to complex. Chapter 1 scientific theory and the big bang. Ne(cid:449)to(cid:374)(cid:859)s la(cid:449) of gra(cid:448)it(cid:455) predicts behaviour of an object as it falls, but does not explain why an object falls. Hubble"s law: hubble, demonstrated that there are many galaxies in the universe, universe is expanding, figured out how to measure distances in space, light waves act like sound waves (with respect to the doppler shift/effect) If light source is moving towards observer, light wavelength seems to shorten (moves into blue spectrum (cid:862)(cid:271)lue-shifted(cid:863)(cid:895) Age of the universe: observation of radioactivity puts universe at 13. 2 17. 5 billion years old, analysis of age of white dwarf star puts universe at 13-14 byo, cmb analysis is most accurate 13. 80 0. 04 byo.