Topics: Solar System & Luminosity of Stars

Our star the Sun

H-R Diagram Pg. 15 in your best friend

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

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

Planets

Inner Planets - Terrestrial

Mercury Mostly basalt Thin atmosphere of H & He

Venus Mostly basaltic rock Atmosphere is CO 2 and N 2

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

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

Outer – Jovian Planets

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

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

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

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

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

Other Objects in the Solar System Asteroids Comet Meteor

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

Pg. 15 in your best friend

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