What is the total gravatational pull of all eight planets on earth?

Answer 1

It's easy enough to do the math for.

F = (GMm)/(r^2)

m is the mass of the earth, M is the mass of whatever other body you're looking at, and r is the distance between the two. G is the universal gravitatonal constant.

And F from all other planets at any given moment is just the sum of the vectors of each individual F.

Answer 2

First, there are only seven planets other than Earth, according to current classification. Pluto is not a planet.

Second, the gravitational pull of any of the other seven planets is negligibly small compared to the pull of the Sun. In fact, the gravitational force on your body from Jupiter, the largest planet in our system, is smaller than the gravitational force of a person standing next to you. That's how negligible it is.

Answer 3

The approximate values, for when the planet is closest to the Earth:

Sun = 5793 micro-m/sec^2
Moon = 37.7 micro-m/sec^2

Mercury = 2.45 nano-m/sec^2
Venus = 178.8 nano-m/sec^2
Mars = 9.57 nano-m/sec^2
Jupiter = 288.28 nano--m/sec^2
Saturn = 24.90 nano-m/sec^2
Uranus = 0.87 nano-m/sec^2
Neptune = 0.36 nano-m/sec^2
Pluto = 0.000046 nano-m/sec^2

If all these forces were acting in the same direction, they would add up to 594 micro-G's. This is 99.345% from the Sun, 0.646% from the Moon, and 0.009% from the other planets.

P.S. The accelerating force from a person standing next to you (100 kg, 1 meter away) is about 6.7 nano-m/s^2, which is a lot less than the force from Jupiter!