- 1. Is reality closer to the top video or the bottom? - 2.
Using your finger, show just how long it takes light to get from
the Earth to the Moon. - 3. What information will you need to
know to solve the problem? - 4. If it were bright enough, how
long would it take Dan's flashlight to reach Pluto? - 5. Choose
an object in the universe and find out how long it will take the
light from Dan's flashlight to reach it.' - 6. If the light
takes a month to reach a certain point in space, where might
that point be? - 7. How far does light travel in ten years? (A:
Ten light-years. Introduce a new unit of distance.)