Our Solar System Made of 8 planets, 1 star (Sun), >100 moons, asteroids, comets, etc. Huge distances between all of these so mainly empty space, space is a “vacuum”.

The Inner “Terrestrial” Planets The four innermost planets Terrestrial means Earth like Relatively small and dense Rocky, iron and silica rich 3 moons total 2 with atmospheres, 2 without

Solar System Scale

The Outer “Jovian” Planets Planets 5-8 from the Sun Jovian means Jupiter like Also known as gas giants due to large size and the fact that they are composed of mostly gases Very low density, close to that of Sun More moons

The Sun – an average star Yellow dwarf/Main sequence star 4.6 BYO 5,5000C surface temperature/15,000,000 0C core Consists of 75% hydrogen and 25% helium Largest object in S.S. Makes up 99.8% of S.S. by mass. 1,300,000 Earth's can fit inside the Sun

Moons – planet like bodies that revolve around planets Mercury 0 Venus-0 Earth-1 Mars-2 Jupiter-63 Saturn-60 Uranus-27 Neptune-13

Asteroids- Small chunks of rock left over from solar system formation 30,000 asteroids lie in a belt between Mars and Jupiter Possibly an old planet that got broken up

Comets- chunks of ice and dust. Orbit the sun in exaggerated elongated paths. High “e” Most go beyond the path of Neptune. Tail caused by solar wind and always faces away from Sun