1. 14 – 2 The Solar System Warm - Up
1. List the planets in order; include the asteroid belt.
2. What did Copernicus do?
3. What did Kepler do?
4. What is the difference between rotation and revolution?

2. The Solar System

3. The Solar System Solar System – made up of 9 planets (including Pluto)
Including numerous other objects that orbit the sun

4. Measuring Space Astronomical Units – AU’s 150 million km’s
93 million miles
Distance from Earth to Sun

6. Outer Planets Pluto? Neptune Uranus Saturn Jupiter Gas Giants
Exception of Pluto
No solid surface
Rings of dust and ice
Exception Pluto
Moons

7. Pluto Small rocky frozen crust Farthest from sun Smallest No rings
One moon – Charon (1/2 size of Pluto)

8. See Ya Pluto!
Pluto is now considered to be a dwarf planet.

9. Neptune 8th planet from Sun
Ringed
Pluto occasionally crosses inside Neptune’s orbit
Atmosphere made of methane
Blue / Green Color

10. Neptune
From Neptune was further away then Pluto

11. Uranus
7th planet from Sun
Axis it tilted horizontally
Thin Rings

12. Saturn 6th planet from the sun Rings made of ice and rock
Size of dust to meters

13. Saturn
2nd largest
Least dense – would float in water

14. Jupiter 5th planet from the sun Largest planet 28 moons
Some larger than Pluto
Io – more active volcanoes than anywhere in solar system

15. Jupiter
The Great Red Spot - A giant swirling high pressure gas storm in Jupiter’s atmosphere
Much larger than Earth

16. Asteroid Belt Between Jupiter and Mars
Might have become planets if not for Jupiter's gravity

18. Meteoroids, Meteors, Meteorites
Meteoroid: small pieces of rock moving through the solar system
Meteor: Small piece of rock as it passes through the Earths atmosphere
Meteorite: Rock that did not burn up and made it to Earth’s surface.

23. Comets Giant dirty snowballs Made of dust and frozen gases
Ice
Orbit close to sun – Radiation vaporizes materials
Gas and dust forms a tail

26. Inner Planets Solid and rocky Also called “Terrestrial Planets”
Planets closest to the Sun

27. Mars 4th planet from the sun Probes sent to explore planet
Polar ice caps
Signs that once had liquid water

29. Mars
Red Planet – looks red due to iron oxide on surface

31. The Face on Mars

32. The Face on Mars Martian sculpture?
New images show eroded raised surface

33. Earth 3rd planet from sun Water exists as a liquid, solid, and gas
Atmosphere keeps UV rays out
Only planet with life

34. Venus 2nd planet Thick clouds trap heat Rains sulfuric acid 878 F
Hotter than Mercury
Rains sulfuric acid

36. Mercury
Closest to the sun
2nd smallest
Lots of craters on surface