1. Stars

2. Constellations
A group of stars that appears to form a pattern in the sky
AQUARIUS
Virgo

3. Constellations-
Ursa Major - (Big Bear) is the most famous constellation

4. Constellations-
The Big Dipper is part of Ursa Major

5. Circumpolar Rotation around Polaris

6. What happens as you travel North?
The number of circumpolar stars visible, increases as the observer moves North

7. Stars- How far to a star? Closest Star = Sun
93,000,000 miles = 1 astronomical unit
Next closest star
Proxima Centauri
25 trillion miles
2.5 x 10 13
4.2 light years

8. Light year- Distance that light travels in one year
5,900,000,000,000 miles
Polaris- 680 LY
Betelgeuse (red supergiant ) is 490 LY

9. How do we size up?
                                                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                       

10. Wow! Jupiter is BIG

11. Our sun is REALLY BIG!

12. Guess Not!

13. We are REALLY SMALL! I feel so insignificant!

14. Color? Depends on surface temperature cool Hot- ~30,000 ° C
Medium- our sun (5500°C)

15. Classification of stars
Green stars look white to us!