There is no gravity in space, everything is weightless.
Motion and mutual gravitational attraction.Another Perspective:Gravity is the only thing required, which is fortunate because it's the only thing there is.
In a sense. The planets all orbit the sun because it contains about 99.9% of the mass of the solar system. The sun wobbles somewhat due to the gravity of the planets, but does not move very far.
Gravity. Magnetism is a fairly short-range force, but gravity goes on forever.
Gravity is the force that pulled all the dust and gas together to form the sun. The gravitational attraction between particles caused them to clump together, leading to the formation of the sun and the solar system.
Forces hold the Universe together. On a closer to home base, the forces also hold our solar system together, allowing us to ask questions on Answers.com. (Gravity exerts a weak force the works from long distances, EM exerts a strong force that works from long distances, and Nuclear forces would take too long to explain.)
It is gravity that holds the planets in their orbits around the sun. Gravity is what gives "shape" to the solar system, to galaxies, and is the large-scale organizer of the universe as a whole.
Jupiter has enough gravity to hold on to most gases because it is the largest planet in our solar system. Its strong gravitational pull prevents gases from escaping into space, allowing it to maintain its thick atmosphere.
Yes, with no Sun, there would be no large force of gravity to hold the solar system together. Each of the planets would carry on in a straight line (more or less) rather than in an ellipse around the Sun.
Well... any planet in our solar system is round, that's because a planet uses it's own gravity to hold itself together in a tight spherical shape. Mars isn't HUGE it's smaller than earth.
There is an intense amount of gravitational energy at the centre of the solar system, this is what is holding the sun together and keeping the reactions between the hydrogen atom happening That same energy holds the planets in orbit, so its pretty strong =]
Jupiter has the most gravity among all the planets in our solar system, and it is able to hold onto its massive atmosphere of gases, primarily hydrogen and helium. Its strong gravitational pull prevents these gases from escaping into space.
It is generally believed that gravity holds the universe together.