When Mars is at its closest proximity to Earth does it affect our tides?

1 Answer
Mar 17, 2016

Only the Sun and Moon have any significant effect on our tides.


To determine how much impact something in the Universe has on our tides, calculate the DIFFERENCE in gravitational force the object exerts across the diameter of rhe Earth.

Let M be the mass of the object in the heavens, d be its distance to the center of Earth, and r be the radius of the Earth. Using Newton's laws to determine gravitational forces, the difference across the Earth's diameter is proportional to


This is much greater for the Sun and Moon than for anything else up there, including Mars at closest approach.