AsteroidX, on 21 December 2012 - 05:29 PM, said:
I was refering to Asteroid or Comet transiting our solar system. That are not native due to the altered gravitational pull.
Gravitational force is proportional to the size of the object and inversely proportional to the square of the distance.
Sagittarius A*, the massive black hole is estimated to be 4,000,000 solar masses. It is also 26,000 light years away. There are approximately 63,000 astronomical units in a light year, therefore Sagittarius A* is 1.6 billion times further away than the sun.
Putting that all together reveals that the gravitational pull of Sagittarius A* on earth is approximately 670
billion times weaker than that of the sun.
Proxima Centauri, the nearest star to our solar system has slightly more gravitational pull on earth than the black hole at the center of our galaxy.
And more to the point, we are the same distance (give or take an utterly insignificant amount) from the center of the galaxy as we were a hundred years ago and will be in a hundred years from now, therefore it's gravitational pull on Earth or any nearby comets or asteroids
has remained the same, there is no "altered gravitational pull" so what possible mechanism are you proposing for why in 2012, it might somehow cause objects from outside our solar system to be drawn into our solar system? Some sort of alignment or whatever isn't going to alter the gravitational pull of Sagitarrius A*, which is utterly negligible as it is.