Celestial Sphere And Star Charts Page 4
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6Astronomy 101
Celestial Sphere and Star Charts
What constellation(s) will appear directly overhead (at the zenith) at sunset, at midnight, and at sunrise?
(Hint: at sunset the Sun is on the western horizon. Turn the sphere; don't change the Sun's position along
the ecliptic.)
Sunset _______________ Midnight _______________ Sunrise ________________
Estimate the number of hours of daylight on this day (today). __________________
5. Using washable ink pens and the positions of the planets below, plot the positions of the planets on your
globe. Which planets will be found in the evening sky? (Set the Sun on today's date and then rotate the
sphere until the Sun is about two hours below the western horizon.)
Ephemeris Positions for May 10, 2016 (from
)
BODY
R.A.
DEC.
Found in evening
sky?(Y/N)
Mercury
3h 5m
16° 53'
Venus
2h 45m
14° 57'
Mars
−21° 46'
16h 13m
Jupiter
11h 0m
+7° 50'
Saturn
−20° 46'
16h 54m
What is the best time to view Venus today? (Note that to view a planet, the sun must not be up. Best
viewing is when the planet is at its highest point in the night sky.)
_______________
What is the best time to view Saturn today? ______________
(Carefully wipe the ink from the sphere with a damp towel. No spit please!)
6. In what constellation is the Sun found in April? _________________
In November? _________________
7. Find the Right Ascension and Declination (R.A. and Dec.) of the following objects
a. Procyan (in Canis Minor)
R.A._________ Dec.__________
b. Spica (in Virgo)
R.A._________ Dec.__________
c. Large Magellanic Cloud (L.M.C.)
R.A._________ Dec.__________
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