Question

How does gravity affect the inner planets?

Answer 1

Compared to the Sun's force on Earth as 1, they are
0.35 1.5 1 0.03 11.3 1.45 0.039 0.019.

Explanation:

Sun's gravity on the planets are proportional to

(mass of the planet)/(square of the distance).

Compared to the Sun's force on Earth as 1, they are

0.35 1.5 1 0.03 11.3 1.45 0.039 0.019.

This Table (in from-Sun order) in the answer is obtained, using mass

comparisons with Earth's mass and, likewise, distance

comparisons with Earth's distance..

Here, (for this purpose) the dimensional Gravitational constant G

= Sun vs Earth mass ratio

= `1.989 X 10^30` kg/`5.972 X 10^24` kg

= 333 thousands. nearly..

The dimensions of G are given by

`[G]=MLT^(-2)`.

The units for M, L and T are at our choice.

The numbers in the Table are dimensionless.

I think that my Table will be useful for comparative study on how

Sun's gravity affects the eight planets, differently...