1. Inner and Outer Planets

2. Question of the Day All light is considered__________?
WWBAT: Describe the characteristics of the inner planets
Homework: none

3. Planets
The international Astronomical Union (IAU) has defined a planet as an object that:
Orbits the sun
Has sufficient mass to be round, or nearly round
Is not a satellite of another object (a moon)
Has removed debris and small objects from the area of its orbit

4. Inner Planets Characteristics Overall:
Also known as Terrestrial Planets
Terrestrial=earth like
Are relatively small and rocky
Are 5 times more dense than water

5. Mercury Is the smallest planet in the Solar System A very dense planet
One rotation: 59 Earth-days
One revolution: 88 days
Daytime temperature: 427 degrees C
Nighttime temperature: -173 degrees C

6. Mercury

7. Venus Is Earth’s twin in size Similar to Earth’s Density
One rotation: 243 Earth Days
One revolution: 225 Earth Days
Covered in thick clouds of poisonous sulfur gas
Has many inactive volcanos
Is extremely hot due to the greenhouse effect
Temperature is about 475 degrees C

8. Venus

9. Earth Has one moon One rotation: 24 hours One revolution: 365.25 days
This is the planet used for reference for all the other planets

10. Earth

11. Mars 2 moons One rotation: 24 Earth hours
One revolution: 687 Earth days
Very thin atmosphere allowing for massive dust storms
There are ice caps on the poles
Meaning there was once water on the planet
Many inactive volcanoes

12. Mars

13. Asteroid Belt Found between Mars and Jupiter
This is the divider between the inner and outer planets
These are rocky bits that are too small to be called planets
These also will break away from the belt and head towards Earth

14. Question of the Day Name two characteristics of the inner planets
WWBAT: Describe the outer planets and distinguish between the two kinds
Homework: Finish the planet characteristics

15. Outer Planets Characteristics Overall: Also known as Jovian Planets
Jovian=Jupiter like
Are large gas giants
Are 1.5 times more dense than water
Exception would be Saturn
All have rings
Exception would be Pluto

16. Jupiter 63 moons One rotation: 10 Earth hours
One revolution: 12 Earth years
Red spot is a storm the size of three earths
Stripes are winds blowing in opposite directions
The farther down the pressure increases to turn hydrogen into liquid

17. Jupiter

18. Saturn 56 moons One rotation: 10 Earth hours
One revolution: 30 Earth years
Has many rings that are visible through an optical telescope
There are some spots like on Jupiter but are very small and more of them

19. Saturn

20. Uranus 27 moons with more to be discovered
One rotation: 17 Earth hours
One revolution: 84 Earth years
This planet is turned on its side
This could of happened by a giant impact
The look is a bowl rolling instead of spinning like a top

21. Uranus

22. Neptune 13 moons One rotation: 16 Earth hours
One revolution: 165 Earth years
Wind speeds exceed 1000 km per hour
There is an Earth sized blemish that looks and acts like the Jupiter storm

23. Neptune

24. Dwarf Planet An object that: Orbits the sun
Is round, or approximately round
Smaller than Mercury
where the information came from

25. Pluto 5 moon One rotation: 6 Earth Days
One revolution: 248 Earth Years
Is near the Kuiper belt
Orbits the opposite the direction of the other planets
During its revolution it will be closer to the sun than Neptune

26. Pluto

27. Other Dwarf Planets Ceres Eris Haumea Makemade
Found within the Asteroid belt and only dwarf planet within the planets
Eris
Orbit is well out of the same plane as the planets and goes out past Kuiper belt
Haumea
One of the fastest rotating large objects in our solar system
Makemade
310 Earth years to complete one orbit around our sun

28. Size Comparison