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[View \| Download]	Mysteries of a Dark Universe Watch this and other space videos at http://SpaceRip.com DARK ENERGY in Full HD 1080p. Cosmology, the study of the universe as a whole, has been turned on its head by a stunning discovery that the universe is flying apart in all directions at an ever-increasing rate. Is the universe bursting at the seams? Or is nature somehow fooling us? The astronomers whose data revealed this accelerating universe have been awarded the Nobel Prize for Physics. And yet, since 1998, when the discovery was first announced, scientists have struggled to come to grips with a mysterious presence that now appears to control the future of the cosmos: dark energy. On remote mountaintops around the world, major astronomical centers hum along, with state of the art digital sensors, computers, air conditioning, infrastructure, and motors to turn the giant telescopes. Deep in Chile's Atacama desert, the Paranal Observatory is an astronomical Mecca. This facility draws two megawatts of power, enough for around two thousand homes. What astronomers get for all this is photons, tiny mass-less particles of light. They stream in from across time and space by the trillions from nearby sources, down to one or two per second from objects at the edge of the visible universe. In this age of precision astronomy, observers have been studying the properties of these particles, to find clues to how stars live and die, how galaxies form, how black holes grow, and more. But for all we've learned, we are finding out just how much still eludes our grasp, how short our efforts to understand the workings of the universe still fall. A hundred years ago, most astronomers believed the universe consisted of a grand disk, the Milky Way. They saw stars, like our own sun, moving around it amid giant regions of dust and luminous gas. The overall size and shape of this "island universe" appeared static and unchanging. That view posed a challenge to Albert Einstein, who sought to explore the role that gravity, a dynamic force, plays in the universe as a whole. There is a now legendary story in which Einstein tried to show why the gravity of all the stars and gas out there didn't simply cause the universe to collapse into a heap. He reasoned that there must be some repulsive force that countered gravity and held the Universe up. He called this force the "cosmological constant." Represented in his equations by the Greek letter Lambda, it's often referred to as a fudge factor. In 1916, the idea seemed reasonable. The Dutch physicist Willem de Sitter solved Einstein's equations with a cosmological constant, lending support to the idea of a static universe. Now enter the American astronomer, Vesto Slipher. Working at the Lowell Observatory in Arizona, he examined a series of fuzzy patches in the sky called spiral nebulae, what we know as galaxies. He found that their light was slightly shifted in color. It's similar to the way a siren distorts, as an ambulance races past us. If an object is moving toward Earth, the wavelength of its light is compressed, making it bluer. If it's moving away, the light gets stretched out, making it redder. 12 of the 15 nebulae that Slipher examined were red-shifted, a sign they are racing away from us. Edwin Hubble, a young astronomer, went in for a closer look. Using the giant new Hooker telescope in Southern California, he scoured the nebulae for a type of pulsating star, called a Cepheid. The rate at which their light rises and falls is an indicator of their intrinsic brightness. By measuring their apparent brightness, Hubble could calculate the distance to their host galaxies. Combining distances with redshifts, he found that the farther away these spirals are, the faster they are moving away from us. This relationship, called the Hubble Constant, showed that the universe is not static, but expanding. Einstein acknowledged the breakthrough, and admitted that his famous fudge factor was the greatest blunder of his career. Tags: astronauts, black, black hole, black holes, cern, computers, editing, einstein, energy, event horizon, extreme, galaxies, galaxy, hawking, hole, hubble, jupiter, lhc, mars, milky, nasa, nature, planets, saturn, science, singularity, solar, space, stars, supermassive, supernova, system, time travel, trance, ufo, universe, way 1 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!)
[View \| Download]	il Large Hadron Collider (Italiano) Una panoramica sul progetto LHC ed i suoi campi di ricerca. Tags: LHC, adroni, cern, fisica, particelle, protoni, ricerca, scienza 1 Downloads - Last from: (Your Blog here!)
[View \| Download]	Neutrini: dimissioni del portavoce della Gelmini. Ma continuerà a prendere 156mila euro all'anno. Si ringrazia http://www.rai.it/ Tags: cern, dimissioni, gelmini, ginevra, gran, istruzione, laboratorio, luce, massimo, ministero, ministro, miur, neutrini, sasso, svizzera, tunnel, velocità, zennaro 1 Downloads - Last from: (Your Blog here!)
[View \| Download]	Mariastella Neutrini Toniutti - canzoncina veloce, ma molto meno della luce! Sono Mariastella e brillo su nel cielo sottoterra invece c'è un tunnel nero nero e quant'è vero che di cognome faccio Gelmini sono certa che là sotto corrono i neutrini E' un esperimento che ha cambiato la scienza questo tunnel che a parole sembra una scemenza e per evitare una figura men che buona Ora vi spiego esattamente com'è che funziona Dall'Abruzzo che produce tanti arrosticini partono in orario velocissimi i neutrini fino ad arrivare nella Svizzera là fuori più rapidamente dei soldi degli evasori E' un condotto in cui il neutrino corre libero e bello e non è vero che esiste solo nel mio cervello Parte dal Gran Sasso e più veloce della luce attraversa il tunnel che a Ginevra lo conduce E ora che ho sparato questa notizia bomba dopo Einstein c'è Totò che si rivolta nella tomba e se il paese muore mentre il governo campa me la caverò licenziando l'addetto stampa Per alzare il livello non è mai troppo tardi il mio vero obbiettivo è superare Giovanardi il mio tunnel resterà per sempre attivo e in voga lui ha già troppo da fare con il tunnel della droga Perquesta meraviglia che cambierà la storia Mi intitoleranno una via a sempiteterna gloria, e nella storia del Paese, ultimo tra i fanalini il mio nome resterà "Mariastella Neutrini" Tags: abruZzo, cern, gelmini, neutrini, video 1 Downloads - Last from: (Your Blog here!)
[View \| Download]	las terribles y secretas armas de plasma En el año 1979, presuntamente China consiguió acercarse al desarrollo de una nueva y devastadora arma denominada "Bomba de Plasma", al someter a la materia a altísimas presiones equivalentes a varios millones de atmosferas, la materia pasaba a un estado inestable que como resultante desencadenaba una asombrosa explosión que devoraba toda la materia circundante a cientos o quizás miles de kilómetros a la redonda. Todo quedaba vitrificado a su paso. Tal devastadora arma estaba en desarrollo a finales de la década de los 70... ¿cual es el estado actual de dicha arma?, ¿es el CERN o acelerador de partículas de suiza cuyo coste es de 10.000 millones de dólares (en el vídeo cometo el error de decir 40.000 millones de euros) un sistema para desarrollar armas de esta naturaleza o de otra?.. Os animamos a que visionéis el vídeo y saquéis vuestras propias conclusiones Tags: arma, armas, atomica, cern, china, ee.uu., plasma, rusia, secreta, secretas 1 Downloads - Last from: (Your Blog here!)
[View \| Download]	The Largest Black Holes in the Universe How big can they get? What's the largest so far detected? Where does an 18 billion solar mass black hole hide? We've never seen them directly... yet we know they are there... Lurking within dense star clusters... Or wandering the dust lanes of the galaxy.... Where they prey on stars... Or swallow planets whole. Our Milky Way may harbor millions of these black holes... the ultra dense remnants of dead stars. But now, in the universe far beyond our galaxy, there's evidence of something even more ominous... A breed of black holes that have reached incomprehensible size and destructive power. It has taken a new era in astronomy to find them... High-tech instruments in space tuned to sense high-energy forms of light -- x-rays and gamma rays -- that are invisible to our eyes. New precision telescopes equipped with technologies that allow them to cancel out the blurring effects of the atmosphere... and see to the far reaches of the universe. Peering into distant galaxies, astronomers are now finding evidence that space and time can be shattered by eruptions so vast they boggle the mind. We are just beginning to understand the impact these outbursts have had on the universe around us. That understanding recently took a leap forward. A team operating at the Subaru Observatory atop Hawaii's Mauna Kea volcano looked out to one of the deepest reaches of the universe... And captured a beam of light that had taken nearly 13 billion years to reach us. It was a messenger from a time not long after the universe was born. They focused on an object known as a quasar... short for "quasi-stellar radio source." It offered a stunning surprise... A tiny region in its center is so bright that astronomers believe it's light is coming from a single object at least a billion times the mass of our sun... Inside this brilliant beacon, space suddenly turns dark... as it's literally swallowed by a giant black hole. As strange as they may seem, even huge black holes like these are thought to be products of the familiar universe of stars and gravity. They get their start in rare types of large stars... at least ten times the mass of our sun. These giants burn hot and fast... and die young. The star is a cosmic pressure-cooker. In its core, the crush of gravity produces such intense heat that atoms are stripped and rearranged. Lighter elements like hydrogen and helium fuse together to form heavier ones like calcium, oxygen, silicon, and finally iron. When enough iron accumulates in the core of the star, it begins to collapse under its own weight. That can send a shock wave racing outward... Literally blowing the star apart:... a supernova. At the moment the star dies, if enough matter falls into its core, it collapses to a point, forming a black hole. Intense gravitational forces surround that point with a dark sphere... the event horizon... beyond which nothing, not even light, can escape. That's how an average-size black hole forms. What about a monster the size of the Subaru quasar? Recent discoveries about the rapid rise of these giant black holes have led theorists to rethink their view of cosmic history. Tags: astronauts, black, black hole, black holes, cern, computers, editing, einstein, energy, event horizon, extreme, galaxies, galaxy, hawking, hole, hubble, jupiter, lhc, mars, milky, nasa, nature, planets, saturn, science, singularity, solar, space, stars, supermassive, supernova, system, time travel, trance, ufo, universe, way 1 Downloads - Last from: (Your Blog here!)