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Can we travel faster than the speed of light?
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Topic: Can we travel faster than the speed of light? (Read 760 times)
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Openheimer
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Re: Can we travel faster than the speed of light?
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August 19, 2015, 12:57:39 am »
Warp speed space travel a possibility thanks to Einstein's theory of relativity, astrophysicist says
Updated Mon at 12:27am
Media player: "Space" to play, "M" to mute, "left" and "right" to seek.
Video: Could Einstein's Theory of Relativity make 'warp speed' a possibility? (ABC News)
Photo: Artist's impression of a spacecraft entering warp speed. (NASA CD-98-76634 by Les Bossinas)
Map: Australia
Long considered a staple of science fiction, high speed space travel between galaxies — or warp speed — may actually be possible, according to astrophysicist Professor Geraint Lewis.
Professor Lewis, from the University of Sydney, is set to deliver a talk today at the National Science Week in Sydney, and said the futuristic concept was actually part of Albert Einstein's theory of relativity.
"If you look at the equation that Einstein gave us, it shows you can bend and warp space so you can travel at any speed you like in the universe," he said.
"It's theoretically possible, but can we ever build a warp drive? We have hints that the kind of materials that we would need exist in the universe, but whether or not we could get them together and build a warp drive, we still don't know."
YouTube: Spacecraft enter warp speed in Star Trek
Professor Lewis said a warp drive would mean humanity would be able to colonise the universe at a far greater speed.
"The big problem we have, the speed of light, while fast — 300,000 kilometres per second — the distances involved are immense, so even travelling at the speed of light, it would take four years to go to the nearest star and 2 million years to go to the nearest large galaxy," he said.
"[These distances] would stop you colonising the universe ... so you would need some sort of way to beat that speed limit, and Einstein's theory of relativity gives it to you.
But to visit distant galaxies, conventional rocket thrusters will not be enough — instead, in order to build a warp drive, scientists need to find a material that has a "negative density energy".
No stars in jump into hyperspace
Remember in Star Wars when the Millennium Falcon goes into hyperspace and a kaleidoscope of stars streaks past the ship? Sadly, that really wouldn't happen, a team of British science students have calculated.
"It is not a material that we actually have in our hands, but there are signs that there are aspects of the universe that actually have this kind of property," Professor Lewis said.
"Empty space itself has a negative energy density. The big question is if we could mine it and shape it, we would basically have a warp drive there and then, but we just don't know if that's possible."
While Professor Lewis admitted the concept was theoretical, he said there was "plenty of science that started off as speculative ideas and became real in the future".
"You just have to look at the work of Newton 400 years ago, and even people who work in quantum physics 100 years ago, and those things are real today and they started off as dreams essentially.
"Einstein's theory is already a hundred years old, but we have only started to scratch the surface.
"I think in the next 100 or 1,000 years we will reveal a lot more about the universe and maybe this hyper-fast travel will be realisable."
YouTube: The rebel fleet enters hyperspace in Star Wars
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