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In a paper published in the preprint journal arXiv on March 11, David Kipping, the Columbia astronomer, proposed that an interstellar spacecraft could fire a laser at the gravity mirror of a fast-moving black hole in a binary black hole system. When the newly energized photons from the laser whipped back around, it could re-absorb them, and convert all that extra energy into momentum — before firing the photons back at the mirror again.
Astronomer says aliens might zap black holes with lasers to travel the galaxy
originally posted by: LookingAtMars
originally posted by: Raggedyman
Maybe they also put spaceships in comets and fly them around.
Sure it was an astronomer not an astrologer because that’s just simply to stupid to even consider
If you say so
originally posted by: Kurokage
The only problem I see with this, is only being able to travel to places with black holes or else it's a one way trip.
originally posted by: strongfp
a reply to: Kurokage
You don't need to be near the black hole. You just need a consistent 'stream' of light from the solar sail and it's original source. But then it brings up the question, well to me at least, why do you need black holes to do this? Why not just stream the laser from a planet to the sail, the laser is already going at light speed.