Quiz 3

Student Last Name:_________________ FirstName:______________________Date:___/___/_____

1. We live on an ordinary rocky _ _ _ _ _ _ called Earth, one of   _   known planets orbiting an average star called the _ _ _.
2. _ _ _ _ _ _ _ _ _ _ _ _ _ ly bound collection of a large number of a star is called the galaxy.
3. People long age ago connected the brightest stars into configurations called _ _ _ _ _ _ _ _ _ _ _ _ _ _.


4. It was natural for early astronomers to conclude that the stars were attached to a celestial _ _ _ _ _ _.
5. In all, there are _ _ constellations, most of them visible from North America at some time during the year.
6. The apparent motion of the stars is the result of the spin, or rotation, not of the celestial sphere, but of _ _ _ _ _.
7. The star _ _ _ _ _ _ _ happens to lie close to the north celestial _ _ _ _.
8. In the Southern Hemisphere, the extension of Earth's _ _ _ _ in the opposite direction defines the south celestial pole.
9. The celestial analog of latitude is called _ _ _ _ _ _ _ _ _ _.
10. The celestial analog of longitude is called _ _ _ _ _   _ _ _ _ _ _ _ _ _ _.
11. Declination is measured in north or south of the celestial equator.
12. The celestial equator is at a declination of  _ _  º.
13. The north celestial pole is at a declination of _ _ °.
14. Right ascensions is measured in angular units called _ _ _ _
_,  _ _ _ _ _ _ _,  and _ _ _ _ _ _ _, and it increases in the _ _ _ _ _ _ _ _  direction.
15. The period of time from one noon to the next noon is the 24-hour _ _ _ _ _  day.
16. The apparent daily progress of the Sun and other stars across the sky is known as _ _ _ _ _ _ _  motion.
17. A day measured by the stars is called a _ _ _ _ _ _ _ _ day.
18. Earth moves in two ways simultaneously: it rotates on its central axis while at the same time _ _ _ _ _ _ _ _ around the Sun.
19. The _ _ _ _ _  day is 3.9 minutes longer than the _ _ _ _ _ _ _ _ day.
20. The apparent path of the Sun, relative to the stars on the celestial sphere over the course of a year is called _ _ _ _ _ _ _ _.
21. The point on the ecliptic, where the Sun is at its northernmost point above the celestial equator, is known as the summer _ _ _ _ _ _ _
_ .
22. The winter solstice is the  _ _ _ _ _ _ _ _ day in Earth's Northern Hemisphere.
23. Frequency = 1/ _ _ _ _ _ _.