Feather & Hammer Drop on Moon
Here's the famous footage of the Apollo 15 astronaut David Scott who dropped a hammer & feather on the moon to prove Galileo's theory that in the absence of atmosphere, objects will fall at the same rate regardless of mass.
There has been much debate over the years on whether this footage is real, or was faked in a studio. Decide for yourself!
Update: Photos taken by the LRO (Lunar Reconnaissance Orbiter), of various Apollo mission landing sites on the Moon: https://www.nasa.gov/mission_pages/ap...
Update October 2018: Longer version from AIRBOYD here: • Hammer vs Feather - Physics on the Moon
Update February 5, 2019: Longer version from NASASolarSystem here:
• Apollo 15 Hammer-Feather Drop
"During the final minutes of the third extravehicular activity, a short demonstration experiment was conducted. A heavy object (a 1.32-kg aluminum geological hammer) and a light object (a 0.03-kg falcon feather) were released simultaneously from approximately the same height (approximately 1.6 m) and were allowed to fall to the surface. Within the accuracy of the simultaneous release, the objects were observed to undergo the same acceleration and strike the lunar surface simultaneously, which was a result predicted by well-established theory, but a result nonetheless reassuring considering both the number of viewers that witnessed the experiment and the fact that the homeward journey was based critically on the validity of the particular theory being tested."
-- Joe Allen, NASA SP-289, Apollo 15 Preliminary Science Report, Summary of Scientific Results, p. 2-11