Class 8, ICA #7, September 11.

We did 6 clicker questions.
There were 12 total marks possible.  You get 1 mark
for answering, 1 more mark for answering correctly. 

The clicker questions count for a total of 2 points toward your
course grade, so your points for the day = # of marks * (2/12).






Clicker Question #1:

If a star is next to the NCP then what will we see?

D. We see it move counterclockwise in a circle around the NCP.


Clicker Question #2:

If the star is somewhat north of the celestial equator, what
do we see?

A. We see it rise in the northeast and set in the northwest.




Clicker Question #3 -- Prather et al. page 1 question 3:

A. A is sometimes unobservable.



Clicker Question #4 -- Prather et al. page 2 question 6:

C. 3.



Clicker Question #5 -- Prather et al. page 2 question 10b:

A. due south.



Clicker Question #6:

How many circumpolar stars in the night sky make it to
zenith, do you think?

C. Very few of them.




Solutions to all the question from pages 1 and 2 in Prather:

1. Imaginary plane. But you definitely can't see below the horizon.

2. No. Really what's happening is that the bulk of Earth is
in your way. Earth itself is what stops you from seeing something
that's below the horizon.

3. A4 is unobservable.

4. rising.

5. setting. 

6. 3.

7. none.

8. student 2 is right, student 1 is wrong.

10. A2 due south and moderate to high.
A3 due west, low.
A4 not visible.
B1 northeast quadrant, moderately high up.
B4 due north, low.

11. B never sets.