ANTH 1001 Chapter : Astronomy1
Document Summary
Scale of the universe (moon/satellite = same thing) Sun leaves a shadow under the rings of saturn. Saturn is squished wider than it: q: which planet is the largest? is high, a: jupiter. We"ll be using scientific notation (see handout on moodle) Q: 3700 meters can also be written as: A: 100 cm or 102 m (both are correct) Astronomical unit (au) average distance between sun and earth. Light year (ly) distance light travels in one year. = 63,000 au or 6. 3 x 104 au. On the scale of the solar system, distances are described in terms of the au. On galaxy scales, we use the light-year (ly). Distances between galaxy groups are best measured in millions of ly (mly). Distances across the universe are usually measured in billions of ly (gly). The earth was at the center and did not move. Everything in the sky goes around the earth.
