1) Why are different stars overhead at different times on the same night? What is this apparent motion of the stars called?
2) Answer the following in relation to solar and sidereal days
a. What defines a solar day?
b. What defines a sidereal day?
c. Which is longer and by how much?
3) For each of the following years, say whether or not it is a leap year in the Gregorian calendar.
4) For each of the following, say where on Earth you would have to stand to have the listed option be at your zenith.
a. The North Celestial Pole
b. The Celestial Equator
c. A star at 30 degrees North declination
5) Answer the following for the current year
a. In what month is Earth closest to the Sun?
b. In what month is Earth furthest from the Sun?
c. If someone told you that the seasons are governed by Earth-Sun distance, how does (a) and (b) align with that?
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