1. Topics: Solar System & Luminosity of Stars

2. Our star the Sun

5. H-R Diagram Pg. 15 in your best friend

6. H-R Diagram – Main Sequence = – Red Giant = – White Dwarf = – Supernova =

8. Solar System Summary __ H-R Diagram __ Fusion = __ H H He

9. Planets

10. Inner Planets - Terrestrial

11. Mercury Mostly basalt Thin atmosphere of H & He

12. Venus Mostly basaltic rock Atmosphere is CO 2 and N 2

13. Earth Basalt and Granite Crust Atmosphere: – 78% Nitrogen – 21% Oxygen – 1% Others

14. Mars Mostly basalt Atmosphere: – CO 2 – Nitrogen – Argon

15. Outer – Jovian Planets

16. Jupiter Largest Planet Possibly dark rocky interior, can’t tell Atmosphere: – Hydrogen – Helium – Slight Methane Has rings!

17. Saturn Rings are 270,000 km in diameter Rocky particles and ice make up the rings Atmosphere: – Hydrogen – Helium – Methane

18. Uranus Hydrogen and Helium atmosphere Rings are dark, possibly rock material North Pole

19. Neptune Rings are narrow and contain differing concentrations of particles in arc- shapes Atmosphere is Hydrogen and Helium

20. Dwarf Planet = Pluto Surface may be methane ice Atmosphere may be methane and nitrogen Pluto Charon, Pluto’s Moon

21. Other Objects in the Solar System Asteroids Comet Meteor

22. 8 Planets Formed from a dust cloud of heavy elements from the remains of exploding stars. (Accretion) Inner Terrestrial Planets: Mercury—Mars __ Outer Jovian Planets: Jupiter—Neptune __ Fun Fact! Saturn will float in water—due it its low density Planets and Moons Summary

23. Pg. 15 in your best friend

24. Order of the Universe Smallest to Largest: – Planet – Star – Solar System – Galaxy – Universe