PHYS 1600 Chapter Notes - Chapter 1: Lunar Eclipse, Celestial Equator, Astronomical Object
21 Dec 2015
School
Department
Course
Professor
Document Summary
1-5 earth orbits the sun in a plane called the ecliptic. Sun traces a straight path on the celestial sphere called the ecliptic. The plane created by the sun"s path on the celestial sphere and the plane of the earth"s orbit are identical. Earth"s axis of rotation is tilted relative to the ecliptic by 23. 5 degrees. Because of the tilt the two loops (sun and earth"s paths) meet in two places o o. The daily and annual rhythms of the sky, earth and all arise from three. Autumnal equinox: halfway around the two circles meet again (sun heading southward) celestial motions: Earth"s orbit around the sun which creates the seasons, the year and change in times constellations are up. The moon"s orbit around the earth which creates the lunar phases, o o o cycle of tides and eclipses. 1-6 earth"s rotation creates the day-night cycle and its revolution defines a year.
