UNIVERSE
PLANETARY FORMATION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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circle
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ellipse
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focus
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perihelion
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Detailed explanation-1: -Kepler’s First Law: each planet’s orbit about the Sun is an ellipse. The Sun’s center is always located at one focus of the orbital ellipse. The Sun is at one focus. The planet follows the ellipse in its orbit, meaning that the planet to Sun distance is constantly changing as the planet goes around its orbit.
Detailed explanation-2: -All orbits are elliptical, which means they are an ellipse, similar to an oval.
Detailed explanation-3: -Orbits are eliptical because of Newtons Law of Gravity (bodies attract each other in proportion to their mass and inversly proportional to the square of the distance between them).
Detailed explanation-4: -Like many such figures, the solar system is shown with a tilted perspective, and so the orbits appear highly elliptical. In reality, the orbits of most planets are extremely circular.
Detailed explanation-5: -Earth’s orbit is not a perfect circle. It is elliptical, or slightly oval-shaped. This means there is one point in the orbit where Earth is closest to the Sun, and another where Earth is farthest from the Sun.