HW#2: pg. 30 Rev 4 – 6, CST 4 – 6
Rev 4 – 6
4. What is a constellation? Why are constellations useful for mapping the sky?
5. Describe the daily and annual motions of the Sun, Moon, and stars as viewed from Earth.
6. How and why does a day measured with respect to the Sun differ from a day measured with respect to the stars?
CST 4 – 6
4. If Earth orbited the Sun in 9 months instead of 12, then, compared with a sidereal day, a solar day would be (a) longer; (b) shorter; (c) unchanged.
5. When a thin, crescent of the Moon is visible just before sunrise, the Moon is in its (a) waxing phase; (b) new phase; (c) waning phase; (d) quarter phase.
6. If the Moon's orbit were a little larger, solar eclipses would be (a) more likely to be annular; (b) more likely to be total; (c) more frequent; (d) unchanged in appearance.