1. Why is Deep Impact such an exciting mission?

It is the first mission that will let us see into a comet.
It is the first mission that will recreate a natural process (collisions) to learn more about comets and cratering.
Individuals, either with their own telescopes or by attending observing sessions hosted by local clubs, observatories, or planetariums, can watch how the comet's appearance changes over several days.
All of the above.

2. Which of these is most similar in size to the flyby spacecraft?

A desk
An SUV
A two-bedroom apartment

3. Which planet can change Tempel 1's orbit if Tempel 1 gets too close to it?

Earth
Jupiter
Saturn

4. What is the SI unit for energy?

Watts
Joules
Ohms

5. What is the abbreviated term for 'picture element'?

JPEG
PicEl
Pixel

Correct Quiz