1. Summarize some of the implications associated with the recent discovery of vast reserves of hydrocarbons on Titan.
2. The Oort cloud contains an immense amount of comets. Summarize some of the theories on how this cloud got populated with so many comets and what processes send those comets towards the sun/inner solar system.
3. Compare and contrast the properties of the inner most Galilean satellites (Io and Europa), with the outermost (Ganymede and Callisto).
4. What is unusual about the surface of Triton, as discovered by Voyager II.
5. In the summer of 2005 NASA announced the possible discovery of a 10th planet in our Solar System. Critically assess, from the available evidence, whether or not this newly discovered object should really be considered as a planet. Note that over the last three years, similar new objects have also been discovered.