Spacecraft 'could surf gravitational tubes' to make solar travel more efficient
Gravitational corridors could help spacecraft travel the solar system like ships carried on ocean currents, making longer and cheaper journeys possible, it has been claimed.
By Andy Bloxham
Published: 7:20AM BST 11 Sep 2009
Scientists in the US are trying to map the twisting "tubes" so they can be used to cut the cost of space travel.
Each one acts like a gravitational version of the Gulf Stream, created from the complex interplay of forces between planets and moons.