AST101H1 Chapter Notes - Chapter 2: Umbral Calculus

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Michael Reid

Document Summary

88 western constellations completely cover the whole sky (name for every part of the sky) All of the stars are attached to a transparent celestial sphere. Star closest to north celestial pole is polaris (north star) Earth: 24 hours on its axis, 365 days around the sun. Because of earth"s rotation, sun and other stars rise in the east and sets in the. Moon: orbital plane tilted relative to ecliptic (does not orbit in ecliptic plane) Northern hemisphere: tilted towards the sun -> sunlight spread over less area -> warmer, longer days. Southern hemisphere: sunlight spread over more area -> colder, shorter days. Northern hemisphere: tilted away from sun -> sunlight spread over more area -> colder, shorter days. Southern hemisphere: sunlight spread over less area -> warmer, longer days. When the shadow of one body falls on another body. Lunar eclipse: moon falls into shadow of earth (full moon) Solar eclipse: earth falls into shadow of moon (new moon)