![]() If all civilization began in Australia, all maps would show Australia at the top and Canada at the bottom, and youd have said 'why do the planets orbit clockwise' or, who knows, perhaps the Aussies would have developed clocks that. Therefore, the larger a planet’s orbit, the longer the planet takes to complete it. Answer (1 of 6): This can be called a northern hemisphere bias. Kepler’s Third Law Compares the Motion of Objects in Orbits of Different SizesĪ planet farther from the Sun not only has a longer path than a closer planet, but it also travels slower, since the Sun’s gravitational pull on it is weaker. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. Kepler’s Second Law Describes the Way an Object’s Speed Varies along Its OrbitĪ planet’s orbital speed changes, depending on how far it is from the Sun. The distance from one focus to any point on the ellipse and then back to the second focus is always the same. But the warming we’ve seen in recent decades is too rapid to be linked to changes in Earth’s orbit and too large to be caused by solar activity. We know subtle changes in Earth’s orbit around the Sun are responsible for the comings and goings of the ice ages. A focus is one of the two internal points that help determine the shape of an ellipse. The Sun is a giver of life it helps keep the planet warm enough for us to survive. The Sun (or the center of the planet) occupies one focus of the ellipse. The orbit of a planet around the Sun (or of a satellite around a planet) is not a perfect circle. Kepler’s First Law Describes the Shape of an Orbit
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