What would happen if you dropped a feather on the moon?

Italian physicist Galileo was the first to discover that dropping two objects from the same height will result in them hitting the ground at the same instant if all air resistance is ignored.

The effects of air resistance are seen in the above video, when we drop a feather and a steel ball ball. The feather’s shape causes it to endure significantly more air resistance than the streamlined steel ball does, and therefore the feather takes a much larger amount of time to fall to the ground than the ball.

The video then shows the same experiment but in a vacuum where there is no air to form resistance and so both objects fall with constant acceleration – acceleration due to gravity.