Do lighter objects hit the ground first? Or heavier ones?
On the Earth, a feather falls to the ground much more slowly than a hammer. Ancient people believed heavier objects fall to the ground much faster than lighter objects. However, four centuries ago, Galileo Galilei questioned this belief. He discovered through experiments that all objects, heavy or light, fall at the same speed.
Feathers fall slowly on the Earth because of air resistance. How would it be different on the moon, which lacks air?
After landing on the moon on Apollo 15 in 1971, NASA astronomer David Scott dropped a hammer weighing 1.32kg and a feather weighing 30g at the same time with viewers from around the world watching. The hammer and the feather fell to the surface at the same speed.
On the Earth, The BBC did the same experiment on Earth in a huge vacuum facility. Let's see.
