:)
Isaac newton :)
Gravity keeps planets in their orbits.Newton's laws of motion and universal gravitation explain how orbits work, but have no influence whatsoeveron causing it to work that way.
Newton showed that any two objects in space (eg. two planets) whose movement is controlled by gravity will move in a conic section relative to one another. That is why the Earth moves around the sun in an ellipse.
Basically, If the sun had no gravity we would be drifting off into space and we wouldn't orbit anything. but Because the sun has gravity it pulls the planets in, allowing them to orbit the sun. Without the gravity of the sun there would be nothing to stop us from flying out into the cold darkness of space. As a matter of fact without the force of gravity there would be nothing if that could exist but an infinitesimally fine misty characterless soup that would never bind together. Whose solar system?
Nicolaus Copernicus
No, a dwarf planet is not a moon. A moon is a body which orbits a large body. However, dwarf planets don't orbit any larger bodies and just orbit the sun in their solar system. Most dwarf planets are failed planets that were forming, but were to close to a gas giant whose gravity messed up the formation of the planet.
That is correct. If the result of an experiment cannot be replicated (repeated), the theory is weakened or overturned. In addition, results in general are not absolute as it is always possible something has been overlooked that would significantly alter the theory. For example, Newton's theory of gravity was considered to be very good, and explained the motions of the planets about the sun extremely well. Except for Mercury, whose motion did not fit Newton's model. Eventually Einstein developed a superior theory of gravity (general relativity), which accounted for the motion of Mercury.
Volcanism can only occur on planets with a liquid mantle.
Solid or terrestrial planets are those whose primary mass is land. The terrestrial planets in the Earth's solar system include Earth, Mercury, Venus, and Mars.
The planets whose orbits lie closer to the sun than the asteroids are Mercury and Venus. These two planets are part of the inner planets, also known as terrestrial planets, and are situated closer to the sun compared to the asteroid belt, which is located between Mars and Jupiter.
The four planets whose orbits are nearest the sun are all rocky planets. They include Mercury, Venus, Earth and Mars.
Though Saturn is the only planet whose rings are spectacularly visible, there are three other planets who have faint traces of rings around them. They are Neptune, Uranus and Jupiter.