UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the slower it travels around the sun.
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the faster it travels around the sun.
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the smaller the angle of its axis.
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the greater the angle of its axis.
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Detailed explanation-1: -A planet’s orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit.
Detailed explanation-2: -The closer a planet is to the Sun, the less time it takes for it to go around the Sun. It takes less time because the length of the orbit is shorter (a smaller orbit), but it also moves faster in its orbit. Thanks to gravity, it has to move faster in its orbit to stay in orbit!
Detailed explanation-3: -According to Kepler’s law of planetary motion, a planet revolves around the sun in such a way that its areal velocity is constant. i.e., it moves faster when it is closer to the sun and vice versa.
Detailed explanation-4: -But Mercury is the fastest planet, zipping around the Sun every 88 Earth days.