Earth Sciences 1086F/G Lecture Notes - Lecture 2: Triangulum Galaxy, Parsec, Local Group
24 Mar 2016
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Chapter 2 - time and space: light-year the distance light travels in one year; 300,000 km per second; 9. 4608 1012 km per year, measuring light years. Years distant (near: earth rotates around the sun, the nearby star appears to "wobble" relative to the distant stars. If we point a telescope at our nearby star in january, and then take another look in. Galaxy (although it is much bigger), and to resemble a frisbee. That is what we use for really distant objects.
