Earth Sciences 1086F/G Lecture Notes - Lecture 1: Cosmic Microwave Background, Edwin Hubble, Triangulum Galaxy

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

Document Summary

Chapter 1 scientific theory and the big bang. First we will look at the scientific method: Hypothesis an educated guess based on observation, this is usually supported or rejected through experimentation or more observation, this cannot be proven true. Both hypotheses and theories attempt to explain something, however theories are much better formulated and tested. Law explains a body of observations, this explains things, but does not describe them, Fo(cid:396) e(cid:454)a(cid:373)ple ne(cid:449)to(cid:374)(cid:859)s la(cid:449) of g(cid:396)a(cid:448)it(cid:455) p(cid:396)edi(cid:272)ts the (cid:271)eha(cid:448)iou(cid:396) of an object as it falls, but it does not explain why an object falls. Now we will look at the big bang. The big bang theory is an effort to explain exactly what happened at the beginning of the universe, before the big bang the universe did not exist, At the birth of the universe, ti(cid:373)e a(cid:374)d spa(cid:272)e (cid:449)e(cid:396)e (cid:272)(cid:396)eated i(cid:374) a giga(cid:374)ti(cid:272) e(cid:454)pa(cid:374)sio(cid:374) that e(cid:373)a(cid:374)ated f(cid:396)o(cid:373) a (cid:858)si(cid:374)gula(cid:396)it(cid:455)(cid:859)