# homework2 (1).pdf - Astronomy 3019: Homework 2 Due at the...

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Astronomy 3019: Homework 2Due at the beginning of class on Monday, September 30Name(s) and Special Homework ID Number:Instructions:To receive partial/full credit you must show your work or explain your answerthoroughly. Please circle your final answer to each problem if it is a number.1. (8 points) Given that the distance (semi-major axis length) from the Sun to Saturn is 9.54 AU, howoften does an observer at the Sun’s location see the rings of Saturn exactly edge-on?Make sure toexplain how you arrived at your answer.2. Saturn’s moon Titan has the following properties that may be useful for the parts below:R= 2580 km,a= 1.22×106km,M= 1.35×1023kg,T= 94 K (typical surface/atmospheric temperature). We aregoing to explore how these properties relate to the structure of this moon’s atmosphere.(a) (8 points) Calculate the gravitational acceleration at the surface of Titan.(b) (10 points) Show quantitatively whether or not Titan would be able to retain H2O in its atmosphere.

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Planet, 7 5 cm, 94 K