ASTRONOMY 2

THIRD HOUR SESSION I

NAME

KEY-I

 

 

 

 

 

ACTIVITY: Other Tools of Astronomy: Planispheres and Centerfolds

DATE

 

ID#

 

Planispheres

1. The planisphere rotates about the _?_ which is approximately in the location of the star _?_.

North Celestial Pole

Polaris

2. When facing north, which way should you rotate the planisphere to correspond with the movement of the stars with increasing time?

Counterclockwise

3. The imaginary line that runs from the north point to the south point on the planisphere window is referred to as the _?_.

Meridian

4. On __December 15_ at 12 midnight, facing south, what constellation is on the meridian and the celestial equator?

Orion

5. What time does the star _Capella__ rise on __September 15__?

8:45 PM ( 20 minutes)

6. What time does the star _Vega__ transit on _May 15_?

3:00 AM ( 15 minutes)

7. What time does the star __Altair___ set on ___November 23_____?

10:00 PM ( 20 minutes)

8. What date does the star __Procyon__ rise at ___10:00 pm___?

November 10 ( 4 days)

9. What date does the star __Sirius___ set at _Midnight_? Use South

March 20 ( 5 days)

10. What star is rising on __February 25__ at ___9:00 pm___?

Arcturus

 

Centerfolds (Magazine Star Charts)

11. As the days progress into the future, a given sky configuration will remain the same in the planisphere window and magazine star charts for (earlier, the same, later) times.

Earlier

12. The star chart is centered on the _?_ and the outside edge corresponds to the _?_.

Zenith

Horizon

 

13. An object located halfway between the center and the edge of the star chart will be _?_ degrees above the horizon.

45

 

14. The times for using these star charts become earlier in the evening for dates later in the year. This is due to the revolution of the _?_ around the _?_.

Earth

Sun

15. What object is located on the star chart at coordinates approximately _0_degrees azimuth, and _40_ degrees altitude?

Polaris

 

Compare to Starry Nights

16. Answer question _5__ using Starry Nights. Note: Starry Nights should be set to Standard Time. Set time to 9 PM PST.

7:50 PM ( 4 minutes)

 

17. Using Starry Nights, change the location to ____San Diego______. Now answer question 16 again. Note: Starry Nights should be set to Standard Time. Set time to 9 PM PST.

8:33 PM ( 4 minutes)

18. Is the planisphere result from question _5_ closer to the results from question 16 or to question 17?

17