ASTR 103 Study Guide - Comprehensive Final Exam Guide - Orbit, Earth, Sun
20 Nov 2018
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Order of the planets: mercury, venus, earth, mars. Star is different than a quasar - stands for qazi stellar. Astronomical distances: astronomical unit (au, one au is the average distance between earth and the sun, 1. 496*108 km or 92. 96 million miles. Light year (ly: one ly is the distance light can travel in one year at a speed of about 3*105 km/s or. 186,000 miles/s: 9. 46*10 km or 63,240 au, parsec (pc, the distance at which 1 au subtends an angle or 1 arcsec or the distance from which. Discovering the night sky: the moon, phases, and eclipses. We always see the same side of the moon! The moon rotates at the same rate that is revolves around the earth, so we see the same side of the moon all the time. The sun and the full moon have the about same angular size on the sky of . 5 degrees because -
