ASTR 100 Study Guide - Midterm Guide: Astronomia Nova, Geocentric Model, Deferent And Epicycle
30 Aug 2017
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On the moon, the angles are exactly 180 degrees reversed. Same reflectivity as a chalkboard or asphalt. Looks bright because of the sun illuminates and reflects to earth. Moon is up all of the time, only can see it during the night. Way we see moon changes with time because of its shape and the sun. Phase you see depends on what direction the sunlight is hitting the moon and what angle you see that from. 1st quarter: 7 or so days after new moon, 90 degrees away from the sun, through its orbit around the earth. 1st gibbous phase: getting wider = waxing gibbous phase, now more than half full, it"s (cid:272)alled a gi(cid:271)(cid:271)ous (cid:373)oo(cid:374, rise in late afternoon and is up most of the. Full moon: 2 weeks after new moon, halfway through its orbit, rises at sunset and sets at sunrise; up all night shinning down on earth, 180 degrees away from the sun.
