GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Faster.
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Slower.
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Either A or B
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None of the above
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Detailed explanation-1: -When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.
Detailed explanation-2: -Venus has slowest revolution period around the sun. On the other hand, outer planets have a lot more distance to go, so it takes Jupiter, the closest of them, 12 years to finish a revolution around the Sun while it takes Neptune, the farthest outer planet, 164 years to do the same.
Detailed explanation-3: -The exact speed changes, because at perihelion, we’re closer to the Sun and feel its gravity a bit more strongly, so our speed around the Sun is a bit faster than at aphelion. Together, the tangential and radial velocities add up to gives us our overall orbital velocity, which changes with distance from the Sun.
Detailed explanation-4: -They move pretty quickly! The planets all orbit at different speeds. The closer a planet is to the Sun, the faster the planet orbits. Mercury is the fastest planet, moving at 47.87 km/s while Neptune orbits at 5.43 km/s.