Question

What is the dominant force between astronomical objects? Why are the other three basic forces less significant over these very large distances?

Short answer

The gravitational force is the dominant force. The other three basic forces are less significant as they have very less range.

Step-by-step solution

List of four basic forces

The four fundamental forces are listed below,

(1) Strong nuclear force.

(2) Weak nuclear force.

(3) Gravitational force

(4) Electromagnetic force.

Reason for the gravitational force being the dominant force

Gravitational force is the dominant force between astronomical objects. These forces are attractive and dormant in nature. It determines the motion of stars, galaxies, planets, and moons.

The relative strength of the gravitational force is of the order of ${}^{{10}^{-38}}$. The gravitational force helps one object to attract the other object in the universe. Gravitational force is the weakest force, but its range is the largest as it helps in determining the motion of astronomical objects like planets, galaxies, stars, and moons.

Reason for the other three forces being less significant

The other three basic forces are the strong forces than the gravitational force, but they have very less working range than the gravitational force.

Therefore, the other three forces are less significant.