Gravity is the pulling force between two objects, it is the weakest force in space! Gravity is the most important thing in space. It is what holds every object to another object. If there was no gravity everything would drift away. Once a scientist hung a wrecking ball next to a small house and nothing happened. Then he tried it next to a massive sky scraper. The wreaking ball slanted toward the sky scraper. Why? Because everything has a gravitational pull, even between you and me. The gravity is so small that we can't feel it because we are small. The formula of gravity is Ag x m = Fg (acceleration of gravity x mass = force of gravity). A scientist drops an apple and a bowling ball off the leaning tower of Pisa, the bowling ball lands first, right? NO, every object falls at the same speed. Paper and feathers fall slowly because the air has to slide to the side and back really fast for them to fall. Since the moon is close to the Earth, the gravity has put mile high bulges in it. The moon gives the Earth high and low tide. The Sun effects the weather, for an example it gives most places four seasons. Astronauts are taller in space because on earth they're bones are pushed closer together by gravity. When they come home to Earth, the shuttle reaches a burning 2,300 degrees Fahrenheit (1,260 degrees Celsius) because of friction.