Orrery ratio lab
Engineers (Advanced), mission M6 Space Machines, lesson 3 of 6.
Hook
Can we fix the model so a year is closer to 365 days?
Fair test
Calculate the current ratio. Propose a gear change on paper that gets closer. Test if parts allow.
Bonus challenge
Add the Moon: what ratio would 12 months need?
The build
- 🌍 Sun-Earth-Moon Orrery: Push the arm round: the Earth circles the Sun, spinning as it goes, with the Moon in tow. (level 4 of 5, about 35 minutes, 12 steps)