Suppose earth were moved to one-third of its current distance from the Sun. what would happen to the gravitational force between Earth and Sun?

Answer 1

If an Earth-like planet was orbiting at the same distance from its double solar mass star as the Earth is from the Sun (1 astronomical unit, written 1 AU), then the force would be double that experienced by the Earth. The force at constant distance is just proportional to the product of stellar and planetary masses. We don't know of any reason why an Earth mass planet should not form at 1 AU from a star of 2X Solar mass, though we as yet have few observational measurements of such low mass extra-solar planets.

Because of the higher the gravitational, such a planet would be centripetally accelerated more strongly, and its constant orbital speed would have to be higher than the Earth's. Thus its year would be shorter, 1/(square root 2) of an Earth year or about 258 days.

Answer 2

The gravitational force between the two heavenly bodies will become 9 times more as the gravitation force between any two bodies in the universe is inversely proportional to the square of distance between them.

Answer 3

If the distance between Sun and Earth were doubled, then

-- the mutual forces of gravitation between them would reduce to 25% of what

those forces are now.

-- Earth's period of revolution would increase from 365.25 days to 1,033.1 days.

(2.83 present-size years)

Answer 4

Basically most animals would die from the sudden increase in weight, and others, that managed to survive, would evolve through the generations to become more efficent in their new environment.

Answer 5

Strictly in terms of the inverse-square relationships that are easy to calculate, the intensity of solar radiation on Earth at all wavelengths would be 4 times what it is now, and the Earth would orbit the Sun every 129 days.

The current lifeforms on Earth would not survive, as this would increase both the heat and other radiation received from the Sun. Half of the orbital distance would be about 47 million miles, just outside the aphelion of Mercury and much closer than Venus.

As occurred on Venus, the Earth's water would photodissociate into hydrogen and oxygen, and much of the hydrogen could be lost to space. The remaining oxygen would combine to form carbon dioxide and other oxides. If the temperature became too high, the Earth might not retain clouds, as on Venus, but have its atmosphere totally stripped away by the solar wind, as on Mercury. Either way, the average equatorial temperatures would be more than 300°C and the UV radiation would likely kill off whatever bacterial life survived.

Answer 6

If the Earth and moon were three times as far apart as they are now, then the

mutual gravitational force between them would be 1/9 of its present value. Note

that the force of attraction is equal in both directions, that is, on both bodies.

Answer 7

if the sun was doubled in size it wouldn't make a differne but if it was doubled it mass then the year would be much smaller

Answer 8

1/4 of the current force, as gravitational force is inversely proportional to the square of the distance between two bodies

Answer 9

It would be doubled.

Answer 10

The Gravity would Double.