2 There are patterns in our solar system that give clues to its formation…
3 1. The motions of the major bodies in our solar system are orderly.
4 2. The planets fall into two major categories: Terrestrial and Jovian
5 high density (~5 gm/cc)solid surfacelow density (~1 gm/cc)no solid surface
6 In a science fiction movie the characters land their spacecraft on an alien planet. What kind of planet is it?A) TerrestrialB) JovianC) Can’t tell without more information
7 3. Swarms of asteroids and comets populate the solar system.
8 4. There are important exceptions to the patterns… Venus’s rotation
9 You should know these four clues… 1. The motions of the major bodies in our solar system are orderly.2. The planets fall into two major categories.3. Swarms of asteroids and comets populate the solar system.4. There are important exceptions to the patterns.
10 Which planets have rings? A) Mars, Jupiter, Saturn, VenusB) Jupiter, Saturn, Mercury, NeptuneC) Saturn, Venus, Mars, NeptuneD) Saturn, Neptune, Jupiter, UranusE) Uranus, Neptune, Saturn, Mars
11 Which group below lists only planets with moons? A) Earth, Mercury, Jupiter, NeptuneB) Saturn, Earth, Uranus, MarsC) Mercury, Uranus, Earth, MarsD) Mars, Jupiter, Saturn, VenusE) Mars, Earth, Mercury, Neptune
12 Chapter 8 – The Formation of Our Solar System The Nebular Theory
13 Star system formation is part of a cyclic process
18 Which materials condense depends on temperature Outside the frost line metals, silicates, and hydrogen compounds condenseIt’s hot inside the frost line, so only metals and rock condenseHydrogen and helium don’t condense anywhere in the solar nebula
19 Which materials condense depends on temperature Outside the frost line, planets could form from metals, rocks, AND hydrogen compounds – 2.0 % of the nebular materialInside the frost line, the planets built up from rock and metal – only 0.6% of the nebular materialHydrogen and helium could only be held by the most massive planets
20 Which explains the two types of planets! Small, rocky planets:“Terrestrial”Large, gaseous planets:“Jovian”
21 Jovian planets formed almost like mini-solar systems
22 What is the primary physical law responsible for the heating of the solar nebula as it collapsed? A) Conservation of energyB) Conservation of linear momentumC) Conservation of angular momentumD) Kepler’s third law
23 Asteroids formed inside the frost line, so are rock & metal. In the early history of the solar system, planets and moons grew by collecting leftover planetesimalsMany of those leftover bits remain today. They’re called asteroids and comets.Asteroids formed inside the frost line, so are rock & metal.Comets formed outside the frost line, and so are made mostly of hydrogen compound ices
24 The exceptions to the rules Captured moonsMany captured moons have retrograde,highly inclined,or highly eccentric orbits
25 The exceptions to the rules Our relatively large moon – collisions
26 Astro-Cash Cab! Taylor Trujillo Casey Veneman Francisco Andrade Lena JoycoxDemi Mizokami