How much stronger is the gravitational pull of Saturn from the sun?

Question

The gravitational pull of the sun on earth is 1 AU so if this is then how much stronger is the gravitational pull on saturn?

Answer 1

I think you are asking what the difference is between the gravitational pull of Saturn and the gravitational pull of the sun. You want two separate values, right? One for each or a ratio? I'll see what I can find out.

The sun's surface gravity is 27.9 G's or 27.9 times greater than the earth's. Saturn's is 1.07 G's. So the sun's surface gravity is 26 times Saturn's. The reason Saturn has such a low surface gravity despite it's great mass, is that it is mostly gas and its surface is much farther from its center of gravity than it would be if it were dense like the earth.

Now if you were asking what is the difference between Saturn's gravity and the sun's gravity on the earth, then there is almost no reason to compare. The sun's pull on the earth is huge and Saturn's is hardly measurable. They could be calculated using the formula others have given you, but there would be little use for the actual figures.

I see Campbelp has interpreted your question yet another way. He has told you the difference between the sun's pull on Saturn compared to the sun's pull on the earth. I think that just about covers all the possibilities of what you were asking. So choose the one you were looking for.

Answer 2

Your question is worded incorrectly, or has a built in error in its statement. The gravitational pull of the Sun on the Earth is not 1 AU.

1 AU is how far away from the Sun the Earth is.

So it seems as if you want to know how much gravity there is at Saturn as compared to at Earth. Since Saturn is farther away, there is less gravity there. But since Saturn is bigger, it feels a bigger force than Earth would at that distance. The result of these two different and opposite effects have been well answered by the 2nd and 3rd answers above.

Answer 3

The gravitational force between any 2 bodies is given by the formula:

gM1M2/r^2

Where g = the universal gravitational constant
M1 is the mass of 1 body
M2 is the mass of the other body
r is the distance between the two centres of mass of the 2 bodies.

So, you need these numbers to figure out the gravitational pull between these 2 bodies.

Answer 4

1 AU is the distance of the Earth from the Sun. It isn't gravitational pull.

Saturn is 9.539 AU from the sun.
Saturn has 95.3 times as much mass as the earth.
The force of gravity from the Sun on Saturn is 95.3/9.539^2 times as much as on the Earth.
Which comes out to be 1.05 times as much. Or about 5% more.

Answer 5

We have to use an A2 level equation to figure this one out (the answer of which I'm not sure about without doing the calculation!)
The equation is Newton's law of universal gravitation.

Fgravity=G(M1*M2)/r^2

SO for Earth, Fg=6.67x10-11(5.98x10^24 x 1.9x10^30)/(150*10^9)^2
=3.37x10^22N
for Saturn, Fg=6.67x10-11(5.69×10^26 x 1.9x10^30)/(1.4x10^12)^2
=3.68x10^22N
So they're not that different, surprisingly!
(I've a strong feeling my calculations are out, but hey, it's good practise for me too!)