Birth of Modern Astronomy Celestial Motion Lab starts this week—NS 017 Bring lab manual to lab Do Prelab 1 before you go! Get your lab manual • Do Prelab 1 and bring to lab class • Lab starts with activities this week • Make-ups are difficult to accomplish, so be sure to attend your lab regularly • Must pass lab to pass class Peer Led Team Learning • Library—Room 101 • Wednesday 5:30 to 7:30 PM • Add ES104X—CRN 11870 • Can add before Oct. 8 session – Do review questions to see if you think it help – Sit in to see if it is for you Nicolaus Copernicus • Earth rotates on an axis, instead of everything orbiting Earth • Earth orbits Sun like the planets, so it a planet too • “On the Revolution of the Heavenly Spheres”, 1543 http://www.hao.ucar.edu/public/education/sp/images/copernicus.html Tycho Brahe • Detailed observations of movement of planets http://www.hao.ucar.edu/public/education/sp/images/tycho.html Tycho Brahe in his observatory • His careful observations and records are his most important legacy http://www.hao.ucar.edu/public/education/sp/images/tycho.3.html Tycho’s 1572 Nova observations http://www.hao.ucar.edu/public/education/sp/images/tycho.1.html Tycho’s comet of 1577 http://www.hao.ucar.edu/public/education/sp/images/tycho.2.html Tycho’s model of solar system • Discounted Copernicus model because he could not discern stellar parallax • It does exist, he didn’t have tools to see it http://www.hao.ucar.edu/public/education/sp/images/tycho.4.html
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Birth of Modern AstronomyCelestial Motion
Lab starts this week—NS 017Bring lab manual to lab
Do Prelab 1 before you go!
Get your lab manual
• Do Prelab 1 and bring to lab class• Lab starts with activities this week• Make-ups are difficult to accomplish, so be
sure to attend your lab regularly• Must pass lab to pass class
Animation link -- http://www.astro.virginia.edu/class/oconnell/astr121/im/lunation-anim.gif
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Sidereal vs. Solar Day
• The distance of the star is greatly shortened in this drawing…should be over by Lincoln City compared to other distances shown in diagram
Moon’s Motion
• Rotates on axis once each 27 1/3 days• Same side always faces Earth• No atmosphere—extreme temperature
variation: 127o to -173o C
Lunar Eclipse
Solar Eclipse Solar Eclipse Eclipse geometry
• Favorable for eclipse twice each year
Lab Starts this Week
• Room NS 017• Down the south stairs• Do not miss class the first week• Buy your lab manual and read the first lab• Do the prelab questions, because your lab
• Room NS 017• Down the south stairs• Do not miss class the first week• Buy your lab manual and read the first lab• Do the prelab questions, because your lab