AST101H5 Lecture : AST101H5 Solar System Astronomy (3RD)
Document Summary
Is earth moving? even though we feel stable it is an illusion because we are moving we must leaner to measure earths motions earth is rotating one spin takes one day the speed of rotation is high at earth"s equator speed = circumference/ 24 hours pid earth/24= pi x 12756 km/24h= 1670 km/h at mississauga we are going slightly slower. = 2pi au/yr= 2pi x 150,000,000 km/ 8767 hrs= 107, 500 km/h chapter 2 constellations (don"t need to know) patterns of stars we see in the sky stars in a constellation may not be close to each other in space they just appear groups together as seen form earth appendix i on on pgs 28 31 a we use the stars as a fixed background to detect the motions of the sola system our local sky we see the sky above the horizon where we are standing we see angles.
