## orbital effect of a sudden change to G

If the gravitational constant suddenly changed, would the earth change its orbital radius r' such that the new G'M'/r'^2 equals todays GM/r^2. If not how?

 PhysOrg.com astronomy news on PhysOrg.com >> Galaxy's Ring of Fire>> South Africa's new radio telescope reveals giant outbursts from binary star system>> Researchers find winds on Uranus and Neptune confined to thin atmosphere layer
 Mentor There is no way to answer the question "if I dispense with the laws of physics, what do the laws of physics say will happen."

 Quote by Vanadium 50 There is no way to answer the question "if I dispense with the laws of physics, what do the laws of physics say will happen."
Another version which I think does not dispense with the laws of physics.

An asteroid 1.0*10^-15 the mass of the sun's mass joins with the sun (giving the sun's new mass M'). The asteroid's path into the sun does not disturb the orbit of earth.
Considering only the effect of the suns mass change (I know there are other effects), is there an orbital radius change such that M'G/r'^2 is equal to the old M_sun/r^2. If not, no matter how negligible the effect, what is the gravitational effect of the mass change to earth's orbit (e.g. change in P?).

Mentor

## orbital effect of a sudden change to G

You can't have an asteroid magically have no gravitational pull on the earth until it hits the sun, and then magically have it's gravity restarted. There is no way to answer the question "if I dispense with the laws of physics, what do the laws of physics say will happen."