Calculating the gravity

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In order to find the amount the planets change the gravitational constant,I needed to find the values of m, which is the mass of the planet/sun, and r, which is the distance from the Earth to the planet/sun. Because the planets orbit in an elliptical shape and the distance from earth can vary extremely, I used the lowest known value for r for each individual planet (and the sun. Fun fact: the point where the earth is closest to the sun is called it's Parihelion). (These m and lowest r values are according to

Then, I plugged them all into the equation: g=\frac{Gm}{r^2} which would allow me to find the planet's contribution to the gravitational constant.

Sun m: 1.99e30 kg,     r: 147,000,000 km

Mercury m: 3.3e23 kg,     r: 77,000,000 km

Venus m: 4.87e24 kg,     r: 38,000,000 km

Moon m: 7.348e22 kg,     r: 384,4000 km

Earth r: 6,378.1 km


Now, I shall spare you all the horror of looking at all those calculations, because, trust me, it isn't pretty. I'll give you an example, though.

Fg sun: \frac{\left(6.67e^{-11}m^3kg^{-1}s^{-2}\cdot1.99e^{30}kg\right)}{\opencurlybrace\left(147,000,000km-6378.1km\right)\cdot1000m\closecurlybrace^2}=0.00614\frac{m}{s^2}

The bottom radius is subtracted by 6378.1km because that is the average radius of the Earth.

In the end, I got this:


But the question is: Will it make a difference?

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