Astrophysics fall trimester  2005

syllabus   &  course expectations  &   course links

Astronomy Picture of the Day        the latest astrophysics discoveries
what's up in the
sky this week       Skywatcher's Diary for this month

 Monday, September 26 Tuesday, September 27 Wednesday, September 28 Thursday, September 29 Friday, September 30 class be able to answer all the questions previously asked about hydrogen and helium for CALCIUM (energy level diagram in green book) jit due by 2 pm see homework below see homework below reading (always done before class) 5(9) on the doppler effect on galaxies recommended:  26(1-4) the redshift/blueshift part: 26(5) 4(4-6) on Kepler's laws make sure you can state Kepler's 3 laws (at least applied to planets, even though we will apply to binary stars) (no reading on dark energy till the weekend) 4(7) on how Newton derived Kepler's 3rd law from his (Newton's) physics laws  and therefore knew that his gravity law not only predicted how falling apples would behave, but also how orbiting planets behave) homework measure the wavelength and the frequency of the waves (see doppler applet below) as would be determined by an observer who is a) stationary with respect to the source b) in relative approach to the source (at speed = 0.5, classical) c) in relative recession from the source (at speed = 0.5, classical) please dont bring me only the answers, but show work on the paper (which you will hand in) find H in units of inverse years starting with just basic physics laws, attempt to derive Newton's version of Kepler's 3rd law make the assumption that we did in class, that the orbits are both circles; you should have to use 1) newton's gravity law 2) newton's 2nd law 3) the formula for centripetal acceleration (discovered by newton, who invented calculus to derive it) 4) the formula for speed in a circular orbit AND 5) the center of mass equation web stuff doppler effect applet reading for monday on dark energy and binary star sections 19(9,10) lab news & discoveries