ASTRON C10 Chapter Notes - Chapter 4: Baily'S Beads, Photosphere, Orbital Period
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ASTRON C10 Full Course Notes
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The period between two identical phases is 29. 5 earth days. a. b. c. d. e. f. Synodic period: the type of period that depends on the orientation with respect to a third body (the sun) Mercury, venus, and earth all have visible phases. A full moon rises just as the sun sets. In the crescent phase, there is earthshine: we are seeing sunlight that was first reflected by earth toward the moon, and then from the moon back to earth (because the earth is gibbous) The moon"s orbit is tilted 5 degrees relative to the earth"s orbit, so eclipses don"t happen every month. Planets and moons have detectable disks that show phases, depending on how much of the sunlit side we see. Sidereal period: the moon revolves around the earth every 27 and 1/3 days with respect to the stars.
