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Answered 2015-03-11 18:01:20


The weight of an object on the surface of a planet depends on ...

-- The mass of the object.

-- The mass of the planet.

-- The distance between the center of the object and the center
of the planet, i.e. the planet's radius.

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Answered 2015-03-17 15:50:29


There's a very definite relationship ... which we can write as a fairly simple mathematical
formula ... between the planet's mass, its radius, and the acceleration of gravity at its surface.

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If you were to land on the planet Pluto, there would half the amount of gravity as there is on the moon; not very strong at all!


Jupiter has the strongest gravity of any planet in our solar system.


Jupiter has the strongest gravity of any planet in the solar system, more than twice as strong as the gravity on Earth. Neptune (1.14 x Earth gravity) and Saturn (1.06 x Earth surface gravity) also have stronger gravity than Earth.


The bigger the planet or moon the more gravity


If it is a rocky planet with a large iron core, Gliese 581c has a radius approximately 50% larger than that of Earth. Gravity on such a planet's surface would be approximately 2.24 times as strong as on Earth. If Gliese 581 c is an icy and/or watery planet, its radius would be less than 2 times that of Earth, even with a very large outer hydrosphere. Gravity on the surface of such an icy and/or watery planet would be at least 1.25 times as strong as on Earth.


At the surface, 38% of its value at the Earth's surface.


-- the masses of both objects that are being drawn together by gravity -- the distance between their centers of gravity


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The acceleration of gravity on the surface of any astronomical body depends on its mass and the distance of its surface from its center ... the 'radius'. Whatever the nature of gravity on its surface is, that's the reason. I was about to say "It doesn't.", but I don't know whether you consider Pluto to be a planet any more. Mercury's gravity is more than 6 times as strong as Pluto's is. And it's also more than double the strength of gravity on the surface of our Moon.


gravity on Pluto is about 1/12th the surface gravity on Earth


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In our solar system, at least, the planet with the greatest mass does happen to be the one with the most known moons. But I think the cause and effect work the other way. It's not the moons that give the planet strong gravity. It's the strong gravity of the planet that captures a bunch of moons.


16.55% as strong on the surface.


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No. Earth's gravity holds us on Earth's surface. It is directed towards the center of the planet. Only powerful engines are strong enough to remove objects, and us, from the surface.


The surface gravity on Mars is 3.711 m/s^2 or 0.379 g.


0.067 times Earth's gravity, or 0.658 m/s2.


Yes. The surface gravity on Mercury is about twice as strong as it is on the moon.


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Yes their gravity if strong enough will make them round.


Saturn's surface gravity is approx 6.5% greater than the earth's.


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