Vulnerable Inmates, Victims Of Crimes At School & Planisphere Lab
sherie12
Lab11PHSC1021PlanisphereLab.docx
Objectives:
· Construct a simple planisphere.
· Demonstrate its use for astronomical observations.
Introduction:
A simple planisphere like the ones depicted are devices that aid in finding objects in the night sky. Alignments are made between the outer circles that usually contain the date and the time. Once properly aligned, the interior portion of the planisphere represents the dome of the entire sky at that particular data and time for latitudes on the Earth from about 30-50 degrees (This includes the entire state of Arkansas).
Procedure:
· Cut out the planisphere provided and orient it for December 1st and the time for 8 p.m. (after sunset). Be aware of differences between CST, CDT, & UT (GMT).
1. List two constellations that lie on the meridian (North-South line through overhead or zenith).
__________________ __________________
2. List a constellation that will be rising in the eastern sky. __________________
3. List a constellation that will be setting in the western sky __________________
· Orient the planisphere for December 1st and the time for 4 a.m. (before sunrise).
4. List two constellations that lie on the meridian.
__________________ __________________
5. List a constellation that will be rising in the eastern sky. __________________
6. List a constellation that will be setting in the western sky __________________
· Orient the planisphere for December 1st and the time for noon.
7. List two constellations that are out during the day but were simply obscured by the sun's glare.
__________________ __________________
8. List a constellation that is rising in the eastern sky.__________________
9. List a constellation that is setting in the western sky.________________
· Orient the planisphere for a date six months from December 1st and the time for 12 a.m. (midnight).
10. List two constellations that lie on the meridian.
__________________ __________________
11. List a constellation that is rising in the eastern sky.__________________
12. List a constellation that is setting in the western sky.________________
· Orient the planisphere for the date and time of your birthday.
Chosen Date and Time __________________ __________________
13. List two constellations that lie on the meridian.
__________________ __________________
Planisphere Constellations 1
6
A
M
5
A
M
4
A
M
3
A
M
2
A
M
1
A
M
1
2
1
1
P
M
1
0
P
M
9
P
M
8
P
M
7
P
M
6
P
M
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
P
L
A
N
I
S
P
H
E
R
E
CUT OUT CENTRE OVAL
ALONG THE BLACK LINE.
NORTHERN HORIZON
SOUTHERN HORIZON
EASTERN HORIZON
WESTERN HORIZON
WHAT TO DO
FOLD SIDE AND BOTTOM FLAPS AT DOTTED LINE
TO HOLD THE STAR CHART IN THE FLAP
FOLD SIDE AND BOTTOM FLAPS AT DOTTED LINE
TO HOLD THE STAR CHART IN THE FLAP
Conseil national
de recherches Canada
National Research
Council Canada
Figure A is a star chart. You may, if you wish, cut out a piece of cardboard and glue the star chart to it. Figure B represents the guide that will enable you to view the stars and constellations in the sky based on the time of day. Make sure to cut out the oval where indicated and fold the flaps (also indicated) down. Slide the star chart into the flaps. To determine which constellations and stars are visible on any given day or month, simply rotate the star chart disc. What appears in the oval is what you will see.
