abstract:A gravity tractor (GT) is a spacecraft that deflects another object in space, typically a potentially hazardous asteroid that might impact Earth, without physically contacting it, using only its gravitational field to transmit the required impulse.Edward T.
The ways to deal with the threat include simply flying a spacecraft into an errant asteroid or either attaching one to it or parking one alongside it, like a gravitytractor, to pull it into another orbit.