![]() Like maybe someone had pulled the power lines taut for miles and then plucked them with a giant finger. They sounded like alien spaceship chatter. Great metallic twangs, or thwangs, or something, that seemed to start here, no there, and rush across the landscape as if carried on an invisible wire. I’d been interested in Bigelow’s anomalistic dealings since that article came out thus, the audio book. In December, a New York Times story revealed that Bigelow Aerospace had conducted a study on UFOs- for the Pentagon. But as the world recently discovered, he didn’t give up the cause. Bigelow deactivated the National Institute for Discovery Science in 2004, after years of failing to capture the supposedly supernatural. ![]() That, at least, is the story told in Hunt for the Skinwalker, a book that I downloaded in audio form one Friday night in January. Soon after reading the newspaper story, he took Skinwalker off the family’s hands, and his institute set up shop. But in 1995, he had also founded something called the National Institute for Discovery Science, an organization built to research paranormal phenomena. ![]() Today, the Nevada businessman is known for founding Bigelow Aerospace, which spun off a business to sell its expandable space habitats just last Tuesday. It came with too-large-thrice-over wolves that refused to die by bullet, cattle with their reproductive organs sucked clean out, and a multitude of UFOs, as they told the Deseret News in 1996. Some years ago the American physicist Harold Puthoff published a very interesting work in the Journal of the British Interplanetary Society.He theorized about the possibility of the modification of the space-time geometry by arbitrary advanced civilizations able to generate the so-called metric engineering and such a modification would be supposed to "allow" the propulsion of spaceships at superluminal veloci-ties.However Puthoff used only diagonalized metrics for his analysis and he even quotes the Schwarzschild metric.In this work we reproduce the Puthoff analysis for the Natario warp drive spacetime and due to the fact that the Natario warp drive is a non-diagonalized metric due to the presence of both the shift and Natario vectors our results are different than the ones obtained by Puthoff.However his idea of a spacetime metric engineering able to distort the spacetime geometry "allowing" superluminal interstellar spaceflight is perfectly possible.In 1994, a Mormon family bought a 480-acre plot in in Utah’s Uintah Basin, thinking they’d get back to the land. With the correct form of the shape function the Natario warp drive can overcome this obstacle at least in theory.Other drawbacks that affects the warp drive geometry are the collisions with hazardous inter-stellar matter(asteroids,comets,interstellar dust etc)that will unavoidably occurs when a ship travels at superluminal speeds and the problem of the Horizons(causally disconnected portions of spacetime).The geometrical features of the Natario warp drive are the required ones to overcome these obstacles also at least in theory. However the major drawback concerning warp drives is the huge amount of negative energy density able to sustain the warp bubble.In order to perform an interstellar space travel to a "nearby" star at 20 light-years away in a reasonable amount of time a ship must attain a speed of about 200 times faster than light.However the negative energy density at such a speed is directly proportional to the factor 10 48 which is 1.000.000.000.000.000.000.000.000 times bigger in magnitude than the mass of the planet Earth!!. There are at the present moment two known solutions: The Alcubierre warp drive discovered in 1994 and the Natario warp drive discovered in 2001. Warp Drives are solutions of the Einstein Field Equations that allows superluminal travel within the framework of General Relativity.
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