Astronomy 2022A/B Study Guide - Midterm Guide: Stellar Magnetic Field, Mushroom Cloud, Ecliptic

• School: Western University
• Department: Astronomy
• Course: Astronomy 2022A/B
• Professor: Livio Tornabene

Document Summary

Chapter 1 a tour of the solar system. Pluto neptune uranus saturn jupiter mars earth venus mercury. Large enough for its own gravity to make it round. Has cleared its neighborhood of smaller objects. Planetary bodies: planets, their satellites, and other small bodies such as asteroids. Sun and most planets rotate counterclockwise on their own orbits. Length of a day ranges from 244 earth days (venus) to. The sun is a star composed mostly of hydrogen and helium. Mean distance from centers of sun to earth is 1. 5x1011 meters (150 million kilometers) Smallest terrestrial planet, no atmosphere (very tenuous) Many impact craters left from asteroids and comets. Volcanism is the most prevalent method for resurfacing. 1015 times less dense than earth (creates an extreme vacuum) Mean density = almost as high as earth, each day lasts 1. 5 years. You have likely seen it before, looks like an extremely bright star.