Galileo and the Falling Bodies

Step 1: What Aristotle Said

Galileo overturned Aristotle's rule that heavy things fall faster with a thought experiment about two tied stones. Drop a ball and a feather yourself, on Earth and on the Moon, and see why they land together.

1. What Aristotle Said
2. The Two Stones
3. Drop Test
4. Rolling Downhill
5. The Moon, 1971
6. Why It Mattered