Skydiving is a sport in which one or more people jump from an airplane and fall freely before opening a parachute. Skydiving is also known as sport parachuting. Skydivers typically jump at altitudes of up to 15,000 feet (4,600 meters) and fall at speeds of more than 100 miles (160 kilometers) per hour. They open their parachutes at 2,000 to 3,000 feet (600 to 900 meters) and then glide to earth at about 10 miles (16 kilometers) per hour.