On July 30, 1971, David Scott and James Irwin, became the seventh and eighth humans to land on the Moon. But rather than bounding out to explore their desolate new surroundings, they elected to rest – after all, they were going to spend a significantly longer period of time on the Moon than their predecessors. During their three days on the lunar surface, Scott and Irwin became the first humans to drive on a celestial body other than Earth. With their lunar rover, they covered a total of about 27.9 kilometers, or 17.3 miles!
They also took advantage of the lack of atmosphere on the Moon to test Galileo Galilei’s “Law of Falling Bodies.” In short, Galileo determined that in a vacuum all bodies accelerate at the same rate regardless of size or mass, or, in his words: “the variation of speed in air between balls of gold, lead, copper, porphyry, and other heavy materials is so slight that in a fall of 100 cubits a ball of gold would surely not outstrip one of copper by as much as four fingers. Having observed this I came to the conclusion that in a medium totally devoid of resistance all bodies would fall with the same speed.”
Galileo’s theory was validated during the Apollo 15 mission using a feather and a hammer. And as far anyone knows, that feather and that hammer are still resting on the Moon where Astronaut Scott let them fall. Don’t you agree they ought to be protected? Watch the video here: