Futurology

I think the last imaginary scenario I read was something like it depended on the mass of any "colliding" objects. Since it relies on the curvature of space time to even work, small mass objects might just be "pushed" aside (small relative to the space craft) or destroyed in a redshifted manner. Larger objects, like planets would essentially disrupt the compression/decompression of space time making it unlikely that the planet would be affected outside from maybe the spacecraft hitting the planet like a meteor