PPT-PHY134
Author : luanne-stotts | Published Date : 2016-04-01
Introductory Astronomy The Sun and the Moon 1 So Far Stars fixed on a large celestial sphere that rotates daily East to West about an axis through Earths poles
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PHY134: Transcript
Introductory Astronomy The Sun and the Moon 1 So Far Stars fixed on a large celestial sphere that rotates daily East to West about an axis through Earths poles Declination is celestial longitude Observers . Introductory . Astronomy . The . Celestial Sphere. 1. The Celestial Sphere. Pattern of stars . unchanging. : can imagine them fixed on a sphere surrounding Earth. Celestial Sphere. is large and rigid. Introductory Astronomy . Waves and Light. 1. Waves. Periodic . disturbances characterized by . frequency . in. Traveling at speed produce periodic . wave . with . wavelength . . Amplitude . Introductory Astronomy . Tides and Matter. 1. Leftovers. Earth . is in free fall under gravity of Sun, so. Sun’s gravity has no effect on Earth!. Almost. none. There are remnants of gravity even in freefall: . Introductory Astronomy . The Solar System. 1. When Light Meets Matter. Dense objects . absorb . light energy or . reflect . it.. How much absorbed can depend on wavelength – . dyes. . Can learn . composition . Introductory Astronomy . The. Sun and the Moon. 1. So Far. Stars . fixed on a large celestial sphere that rotates daily . East . to . West . about an axis through Earth’s poles. Declination . is celestial longitude. Observer’s .
