1. The Solar system

2. Planet order My Very Excellent Mother Just Served Us Nachos.
My = Mercury
Very = Venus
Excellent = Earth
Mother = Mars
Just = Jupiter
Served = Saturn
Us = Uranus
Nachos = Neptune

3. The distance from Earth is the reason we cannot see all the planets.
The further away something is, the smaller it appears in size.

4. Inner planets, rocky planets, terrestrial planets
Mercury, Venus, Earth, & Mars

5. Inner, rocky, terrestrial planets
4 planets: Mercury, Venus, Earth, & Mars
Solid surfaces
Similar in size
All quite close to the sun and closer to each other compared to the Outer Planets.

6. Mercury Closest to the sun Smallest
Surface has craters and cliffs, similar to Earth’s moon
No atmosphere
Extreme temperatures 425ºC – -179ºC
No moons
Revolution around the sun takes 88 Earth days
Rotation takes 59 Earth days to complete one turn

7. venus Similar in size to the Earth Thick atmosphere of carbon dioxide
Sulfuric acid gives it a yellow color
Surface has craters, cracks, and volcanoes
Greenhouse effect cause hot temps of 475ºC making it the hottest planet
No moons
Rotation is clockwise & takes 243 Earth days
Revolution is 225 Earth days
Sometimes referred to as “Earth’s Twin”

8. earth
Sustains life
Surface temps allow water to exist as solid, liquid, & gas
Has one moon
Rotation is 24 hours
Revolution is 365 days

9. mars Red surface because of iron oxide in soil (Red Planet)
Ice caps made of frozen ice and CO2
Large volcanoes and valleys indicating flow of water at one time
Thin atmosphere of CO2
Temps range from -125ºC to 35ºC
2 small moons
Revolution is 687 Earth days
Rotation is 24 hrs. & 37 minutes

14. Outer planets, gas giants, jovian planets
Jupiter, Saturn, Uranus & Neptune

15. All made of gases
All have large number of moons orbiting them
All thought to also have rings, but Saturn having the most visible

16. Jupiter Mostly made of hydrogen and helium
Largest of the 8 planets with the Great Red Spot
The Great Red Spot is a strong storm
63 known moons: Ganymede is the largest moon in the solar system
Rotation is 9 hrs. & 55 min.
Revolution is 12 Earth years

17. Saturn Made mostly of hydrogen and helium
Density is low that it would float in water
Famous for Great Rings that are made of rock and ice particles
47 known moons. Titan being the largest and similar to Earth’s atmosphere
Rotation: 10 hrs. & 39 min.
Revolution: 29.5 Earth yrs.

18. uranus Composed of hydrogen, helium and methane
Methane gives it its bluish green color
Tipped on its side, possible collision with a larger object similar to Earth in size
27 known moons
Rotation: 16 hrs. & 7 min.
Revolution: 84 yrs.

19. neptune Twin of Uranus Made of hydrogen, helium, and methane
Methane gives it its bluish green color
Very active atmosphere with strong winds
Great Dark Spot (storm): appears and disappears
13 known moons: Triton (Little Mermaid)
Rotation: 16 hrs. 7 min.
Revolution: 165 yrs

20. Dwarf planet - pluto
Renamed in 2006 by the International Astronomical Union
Shared characteristics with Ceres and Eris
Once Eris was discovered they decided to redefine the meaning of planets