Unformatted text preview: 4) In the Chinese Agricultural Calendar, a month is defined by the synodic month and a year consists of integral number of month. Hence, in some years, there are thirteen, instead of usual twelve, months. That extra month is called leap month. Given that a year has 365.24 solar days and a synodic month has 29.53 solar days. How many leap months are there in 19 years? 5) Let's assume for simplicity that the orbital plane of Mars is the same as the orbital plane of Earth, and the angle between its rotational axis and revolution axis is 25°. For observers on Mars, is their north celestial pole same as ours? Is their ecliptic same as ours? Are their zodiac same as ours? Can they observe retrograde motion of the Earth?...
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 Spring '10
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 19 years, mean angular size, mean EarthMoon distance.

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