Question

A red supergiant star is ten times more massive than the sun. What would be the likely impact on the motion of Earth if the sun were replaced by this red supergiant?

Answer 1

Expanding red giant stars will swallow too-close planets. In the solar system, the sun will engulf Mercury and Venus, and may devour Earth, as well. So logically concluding, the answer must be that it would devour the planets whole, and there will be no rotation, (assuming this is a trick question)

Answer 2

The motion of earth may slow down or halt

Step-by-step explanation:

The gravitational force between two celestial bodies is directly proportional to the mass of the bodies.

Hence, if the mass of any body is increased ten times, the gravitational pull on earth because of the massive red giant star is ten times.

Therefore, the earth may experience a drag force towards the red giant star.