This is the Apollo 15 on the moon they are testing witch object will land first a feather or a hammer. they then on a count of 5 they dropped the objects.They landed the same time the reason is because our earths atmosphere is blue and when you drop a feather it glides down because of the wind. But the moon has no atmosphere and the feather doesn't glide because their is no wind blowing it so they dropped at the same time.
