The planets of our solar system

1
The planets of our solar system Pluto (a dwarf
planet)

• (chapter 23 sections 1-3)

2
Overview of our solar system

• There are two categories of planets in our solar
  system
• Terrestrial Smaller, more dense, mostly rocky
  metallic, thinner atmosphere due to smaller
  gravitational force.
• Jovian Larger, less dense, mostly gas ice,
  thicker atmosphere due to larger gravitational
  force.

3
Formation of our solar system

• Started as a nebula a cloud of dust gas
• It began to rotate and flatten, with heavier
  particles moving toward the center of the disc
• Planetesimals grew bigger collected more
  material.
• Radiation from the new sun pushed gas planets to
  the outer regions, leaving rocky planets closer
  in.

4
Mercury the smallest planet

• Closest to the sun
• No atmosphere
• Temperature range -279F 800F
• day 59 E. days
• Year 88 E. days
• No moons

5
Venus the veiled Planet

• Hot due to the greenhouse effect (887F)
• Atmosphere is 97 CO2
• Surface shaped by volcanic activity
• Day244 E.D.
• Year 225 E.D.
• No moons

6
Earth the living planet

• Only planet with liquid water on the surface
• Hydrosphere supports, maintains life
• Atmosphere shields radiation, burns up meteors
• 1 year 365 days 1 day 24 hours

7
Mars the red planet

• Polar icecaps have frozen water, CO2
• Largest volcano in solar system
• Thin atmosphere mostly CO2
• Year 693.5 E.D.
• Day 24.6 E. hours
• 10 the size of Earth
• Temp. -94F to -148F
• Has 2 moons

8
Jupiter Giant Gas Planet

• Mass is 2½ times the mass of all other planets
  and moons combined
• Possesses the Great Red Spot a giant cyclonic
  storm

Year 12 E. years Day 10 hrs Moons 63 (and
counting) Temp - 200F
9
Saturn The Elegant Planet
Year 29.5 E. years Day 10 hrs Moons 56 Temp -
285F (top of clouds)

• Most prominent feature is the system of rings
  consisting of individual particles of ice and rock

10
Uranus The Sideways Planet

• Unlike the other planets, Uranuss axis of
  rotation lies nearly parallel with the plane of
  its orbit about the sun
• Has at least 9 distinct ring belts

Year 84 E. years Day 17 hrs Moons 27 Temp -
355F
11
Neptune The Windy Planet

• Winds exceeding 1000 km/hr (600 mi/hr) encircle
  the planet
• Year 165 E. years
• Day 16 hrs
• Moons 13
• Temp - 328F

12
Pluto Dwarf Planet

• Not considered a planet since has not cleared,
  due to its weak gravitational attraction, the
  neighborhood of its orbit of smaller objects

Year 248 E. years Day 6 days Moons 3 Temp -
387F
13
Whiteboard Review

1. What is the smallest planet?
2. Which planet has the longest day?
3. Which planet has the most moons?