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An '''orbit''' is an objects rotation around another. Orbits are caused by the gravity of a large mass attracting a smaller mass. The smaller mass is prevented from falling into the large mass by a large velocity perpendicular to the object it is orbiting around. The concept of orbiting in the solar system has changed drastically over time. Scientists assumed that the orbits of [[planet]]s observable in [[Kepler]]'s times were very circular. Kepler was the first to propose that the planets' orbits were elliptical, thus improving the accuracy and prediction-value of the heliocentric view of the solar system. [[Comet]]s, on the other hand, have highly [[eccentric]] orbits with only one [[focal point]] inside the [[Sun]].

An '''orbit''' is an objects rotation around another. Orbits are caused by the gravity of a large mass attracting a smaller mass. The smaller mass is prevented from falling into the large mass by a large velocity perpendicular to the object it is orbiting around. The concept of orbiting in the solar system has changed drastically over time. Scientists assumed that the orbits of [[planet]]s observable in [[Kepler]]'s times were circular. Kepler was the first to propose that the planets' orbits were elliptical, thus improving the accuracy and prediction-value of the heliocentric view of the solar system. [[Comet]]s, on the other hand, have highly [[eccentric]] orbits with only one [[focal point]] inside the [[Sun]].

The orbit of the [[Moon]] is nearly a perfect circle, but due to its high relative weight the center of its orbit is actually closer to the Earth's surface than it is to the exact center of the Earth.

The orbit of the [[Moon]] is nearly a perfect circle, but due to its high relative weight the center of its orbit is actually closer to the Earth's surface than it is to the exact center of the Earth.

[[category:physics]]

[[category:physics]]