Astronomy 2021A/B Chapter : Textbook Notes- Merritt Loh.docx

• School: Western University
• Department: Astronomy
• Course: Astronomy 2021A/B
• Professor: Stanimir Metchev

Document Summary

Chapter 1: a universe of life: mars still has significant amounts of water ice, so it is usually the first place we look for life. Jupiter"s moon europa has evidence of deep ocean"s of liquid under it"s icy crust. Extrasolar planets planets orbiting stars other than our own sun. Solar system anagram: my very easy method just speeds up naming. Astrobiology combination of the study of astronomy and biology. Atomists often associated with atheism: aristotelians believed the four were confined to earth, and the heavens had a fifth element called ether (aether) or the quintessence. Merritt loh: the orbit of each planet about the sun is an ellipse. Galileo proved that moving objects remain in motion unless a force acts to stop it: non-circular orbits contradicted the view of the heavens. Galileo viewed imperfections of sun-spots through his telescope that were considered. Imperfections : no one had detected stellar parallax that should occur if the earth does orbit the sun.