What is Saturn's surface gravity?

Answer 1

0.92 (times Earth's surface gravity).

Edit :

OK this one is a bit tricky. It is usually given for Saturn's equator. It does

depend on latitude. Also the rotation speed affects the "apparent gravity" because of "centrifugal force", but this doesn't affect the underlying force of course. So you will see some variation in the figures quoted, depending on definition, etc.

I looked at a NASA pages for this and they give two different values. One is the answer above, given by a previous contributor. The other value is:

1.065 x Earth's.

Most sources seem to agree things would weigh a bit more on Saturn, but it's a bit confused.

Answer 2

The only problem here is that a planet's gravitational field depends on how far

you are from its center. On Earth, that's easy to define, because the Earth has

a solid surface. That's where most of us spend most of our time, and so we

understand the acceleration of Earth's gravity to be the number we measure

when we're on the solid surface.

Saturn is a 'gas giant' and has no solid surface. So where should we stand in

order to compare its 'gravity' to Earth's ?

What the planetary scientists do, in order to talk about the 'size' and 'gravity'

of the gas giant planets, is: They consider dangling a barometer down into

the gas, from the wispiest thinnest gas out in space near the planet, down

and down as it get thicker and heavier. And when the barometer gets down

to the depth where the pressure of the gas is the same as the sea-level pressure

of Earth's atmosphere, they call that the 'surface', for purposes of talking about

the planet's 'size' and gravitational acceleration.

When you do that for Saturn, you find that its diameter is 9.44 times as long as Earth's diameter.

The acceleration of gravity at that depth in Saturn's 'atmosphere' has been

measured as 10.58 meters/second2 . . . about 8% greaterthan on Earth.