What is the brightest star in the celestial sphere and the brightest star in the northern celestial hemisphere? Describe their position and movement on December 30th.
1. Sirius and Vega
2. Sirius: Sunrise – A = 300о, t = 19-30 – 20 hours
Climax – h = 19-20о, t = 22 hours
Sunset – А = 60о, t = 4 – 4-30 hours
Time above the horizon – 8 – 8-30 hours
3. Vega: the non-setting star
Lower climax – h = 5o, t = 24 hours
East – A = 270o, h = 50o, t = 6 hours
Upper climax – h = 70o, t = 12 hours
West – A = 90o, h = 50o, t = 16 hours
4. Better to watch Sirius (at night the upper climax), Vega at night in the lower climax – very close to the horizon.
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