1. NASA and the Jet Propulsion Laboratory have tentative plans to place spacecraft in orbit about Uranus and Neptune in this century. What kinds of data should be collected, and what questions would...

1. NASA and the Jet Propulsion Laboratory have tentative plans to place spacecraft in orbit about Uranus and Neptune in this century. What kinds of data should be collected, and what questions would you like to see answered by these missions?

2. Jupiter had formed at one-third its present distance of 5.2 AU from the Sun? What would Earth be like?