Technology: Aliens might zap black holes with lasers to travel the galaxy - PressFrom - US
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TechnologyAliens might zap black holes with lasers to travel the galaxy

01:40  16 march  2019
01:40  16 march  2019 Source:   nbcnews.com

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Intelligent alien races could travel through interstellar space unseen by firing LASERS into orbiting 'Along these lines, this work has considered how an advanced civilization might utilize the light As a result, Kipping said, a civilization that has the means to travel close enough to a black hole could

In the novel The Hitchhiker's Guide to the Galaxy , this spacecraft is found on the surface of Magrathea, parked next to the Heart of Gold. The Vogon ships use hyperspace travel to go faster than light. The lenses turn completely black at the first hint of trouble, thus preventing the wearer from seeing

Aliens might zap black holes with lasers to travel the galaxy© NASA

An astronomer at Columbia University has a new guess about how hypothetical alien civilizations might be invisibly navigating our galaxy: Firing lasers at binary black holes (twin black holes that orbit each other).

The idea is a futuristic upgrade of a technique NASA has used for decades.

Spacecraft already navigate our solar system using gravity wells as slingshots. The spacecraft itself enters orbit around a planet, flings itself as close as possible to a planet or moon to pick up speed, and then uses that added energy to travel even faster toward its next destination. In doing so, it saps away a tiny fraction of the planet's momentum through space — though the effect is so minimal it's pretty much impossible to notice. [9 Strange, Scientific Reasons We Haven't Found Aliens Yet]

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A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.

The subject of this article is from the Visions update.The information from this article is up-to-date as of 22 November, 2018. Black Holes are a type of anomaly. Black Holes take you to a fixed star system across the galaxy and randomly damage one of your starship technologies.

The same basic principles operate in the the intense gravity wells around black holes, which bend not only the paths of solid objects, but light itself. If a photon, or a light particle, enters a particular region in the vicinity of a black hole, it will do one partial circuit around the black hole and get flung back in exactly the same direction. Physicists call those regions "gravitational mirrors" and the photons they fling back "boomerang photons."

That comes at a cost to the black hole, sapping some of its momentum.

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.

This system, which Kipping termed the "halo drive," has a big advantage over more traditional lightsails: It doesn't require a massive fuel source. Current lightsail proposals require more energy to accelerate the space shuttle to "relativistic" speeds (meaning a significant fraction of light speed) than humanity has produced in its entire history.

With a halo drive, all that energy could just be sapped from a black hole, rather than generated from a fuel source.

Astronomers set to make 'groundbreaking' black hole announcement

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A WORMHOLE could exist within our Milky Way which could help space farers travel to other parts of the universe, it has been revealed. Hence, wormholes could be found in nature and our study may encourage scientists to seek observational evidence for wormholes in the galactic halo region."

Black holes and lasers could let us cheat at interstellar travel . Stephen Hawking’s legacy will be honoured with a new 50p coin. Black holes eat negative energy and vomit out huge powerful jets. A black hole the size of Jupiter is just wandering around the galaxy . A cosmic collision may be coming

Halo drives would have limits — at a certain point the spacecraft would be moving so quickly away from the black holes that it wouldn't absorb enough light energy to add additional speed. It's possible to solve this problem by moving the laser off the spaceship and onto a nearby planet, he noted, and just precisely aiming the laser so it emerges from the black hole's gravity well to hit the spaceship. But without re-absorbing the laser light that planet would have to burn fuel to generate new beams constantly, and would eventually dwindle away.

A civilization might be using a system like this to navigate the Milky Way right now, Kipping wrote. There are certainly enough black holes out there. If so, that civilization might be sapping so much momentum from black holes that it would be messing with their orbits, and we could possibly detect the signs of alien civilization from the eccentric orbits of binary black holes.

And if no other civilizations are out there doing this, he added, perhaps humanity could be the first.

Originally published on Live Science.

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Wormhole travel could be real, but would also be really slow.
More importantly though, we may be able to retrieve information from black holes.

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