If sun were a blackhole.. would earth still remain in orbit or go out of the orbit?

Question

anonymous · Answer

well.. if i use newton's law.. then obviously nothing happens to the earths orbit.. cause the force of gravity is unchanged.. but what about the general relativity.. according to it.. gravity is a pseudo force.. it is basically the curvature of space-time.. so a black hole would have a much deeper valley and the depression won't be as spread out as that of suns..  any ideas?

anonymous · Answer

I think the sun would still remain in orbit because of the tangential acceleration and velocity that it has keeping it in orbit.  Therefore, I don't think the sun being a black hole would make a big difference.

anonymous · Answer

!?.. its the centripetal acceleration that keeps the earth in orbit.. but thats not the point.. my question is according to general theory of relativity does the force of gravity go down??? or remains the same?

anonymous · Answer

if sun were a black hole gravity would increase much and earth would rotate very high velocity or its radius would change as the force increases the radius would decrease

anonymous · Answer

No.. thats FOR SURE not gonna happen :P