8A and 8B Quiz bowl part 2

Who discovered that planets have elliptical orbits?

By what process does the Sun produce energy?

Between which two planets' orbits does the asteroid belt occur?

Which of the following answers is a good estimate for the diameter of Mars?

The Viking landers tested for life on

What is the second largest planet?

It includes the Sun, planets, moons and other objects.

Which planet likely will be visited by humans in the future?

The Great red spot is a giant storm on

Which is Pluto's largest moon?