The light-year mail service
20 minutes · Paper · Pencil
Your investigation
- Imagine three stars at distances of 4, 10, and 25 light-years. Draw each with a mailbox labeled Earth.
- Write how many years each light message takes to arrive in this simplified example.
- Choose one star and draw an event there beside the later arrival of its light at Earth.
- Write one sentence that uses “year” for time and “light-year” for distance correctly.
Think, draw, explain
Which message has traveled longest?
Can a light-year measure the length of a birthday party?
Compare your explanation with the grown-up answer guide after you have tried.