Universal Gravitation

1
Universal Gravitation

• Any two masses m1 and m2 separated by a distance
  R are attracted by a force given by
• F G (m1 m2) / R2
• G 6.67 x10-11 Nm2/kg2
• g 9.8 m/sec2

2
Solar System

• Terrestrial Planets and Comparative Planetology

3
Variety of Planets

• Why so different?
• Terrestrial planets
• Jovian planets
• (Terr gas!)
• The physics.
• neat stuff

4
Neat stuff to understand

• What is meant by an atmospheric gas
  temperature?
• Does what goes up have to come down?
• Lets see

5
Put them together

• For planets plot
• vesc vs. temp
• For gases plot
• ltvgt vs. temp
• Problems with extrasolar gas giants.