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앨리 반더밸드 박사 암흑에너지 관찰

앨리 반더밸드 박사  암흑에너지 관찰

Summary: 부드러운 미소가 암흑 에너지에 관해 우리에게말하는바는 약 10년 전에 과학자들은 놀라운 잠정적인 결론을 내린바 있다 우리의 우주가 점차 빠른 속도로 그 시간이 녹는 치즈와 같이 우주공간속으로 떨어져 나간다는 것이다 우주를 떨어지도록 미는 힘은 여전히 미스테리이며 그것이 정확한지 어째서 흑 에너지 칭하게 되었는지는 알수 없다 하지만 암흑 에너지는 정말 사실일까 우리 우주가 정말 가속 중일까 이런 의문들이 NASA 제트추진연구소 JPL 우주공학 주임연구원 A 반더밸드 Ali Vanderveld 의 생각에 전적으로 달렸다 NASA 제트추진연구소의A 반더밸드 박사 A 반더밸드와 그녀의 동료는 최근에 논문지Physical Review에 치 부드러운 치즈같은 우주 라는 논문을 내면서 거대한 구멍을 관찰하고 우주속에 공간을 만드는 것이 마치 실감나지 않도록 가속하는것 처럼 보였다고 한다 그들이 말한 이런 구멍이나 빈 공간은 암흑 에너지로 떨어지는 것을 설명하기에 충분치 않다 그럼에도 불구하고 A 반더벨드는 리 우주의 매우 기본적인 특성에 대한 의문을 지속하기에 중요하다 고 말한다 때로 우리는 암흑에너지를 받기도한다 반더밸드는 말한다 한 우주가 어째서 점차 빠른 속도로 팽창하는지에 대하여 설명할 수 있는 여러가지 학설들이 있다 어째서 과학자들은 우주가 팽창한다고 생각할까 그 흔적의 대부분은 그리 멀지 않은 근래 십수년간의 연구 과정에서 슈퍼노바 Supernova 로 부르는 거대한 초신성 超新星 이 폭팔하는 관찰에서 온다 이런 광경을 포착한 것은 NASA의 허블 우주 망원경 내부에 있는 JPL의 광구경 행성 카메라2이다 천문학자들은 이미 이런 사실을 지적한 바 있다 그것은 대략 137억년 전 초기 우주의 거대한 대폭팔 Big Bang 이 있었다는 것이다 그러나 학자들은 우주 팽창에 대한 발생율도 알지 못하였고 심지어 점차로 느려질것으로 추측하기도 했다 수십억 광년 떨어진 초신성의 거리를 계산해보고 과학자들은 우주 팽창의 시간적 동작에 대한 이해를 얻게 되었다 그 결과는 난해하다 초신성 너머가 예상보다 어두웠다 이는 이전에 믿었던 것보다더 멀리 떨어졌음을 암시하는 것이다 만약우주가 더욱멀리 있다면 그러면 이는우리와 초신성 사이에 우주 공간이 점증하는 속도로 팽창하고 있음을 의미한다 가속중인 우주에 대한 주목이 있은 이래로 추가적인 연구가 있어오고 있다 What Can Swiss Cheese Teach us About Dark Energy Ali Vanderveld PhysOrg com About 10 years ago scientists reached the astonishing conclusion that our universe is accelerating apart at ever increasing speeds stretching space and time itself like melted cheese The force that pushing the universe apart is still a mystery which is precisely why it was dubbed ark energy But is dark energy really real Is our universe really accelerating These questions hang around in the mind of Ali Vanderveld a post doctoral cosmologist at JPL Vanderveld and her colleagues recently published a paper in the journal Physical Review looking at how giant holes in our wiss cheese like universe might make space look as if it accelerating when it really not They concluded these holes or voids are not sufficient to explain away dark energy nevertheless Vanderveld says it important to continue to question fundamental traits of the very space we live in ometimes we take dark energy for granted said Vanderveld ut there are other theories that could explain why the universe appears to be moving apart at faster and faster speeds Why do scientists think the universe is accelerating A large part of the evidence comes from observations taken over the last decade or so of very distant colossal star explosions called supernovae JPL Wide Field and Planetary Camera 2 on NASA Hubble Space Telescope contributed to this groundbreaking research Astronomers had already figured out that space since its inception about 13 7 billion years ago in a tremendous ig Bang explosion is expanding But they didn know if this expansion was happening at a constant rate and even speculated that it could be slowing down By examining distant supernovae billions of light years away scientists could get a look at how the expansion of space behaves over time The results were baffling The more distant supernovae were dimmer than predicted which would suggest they are farther away than previously believed If they are farther away then this means the space between us and the supernovae is expanding at ever increasing speeds Additional research has since pointed to an accelerating universe A group of researchers from Fermi National Accelerator Laboratory in Batavia Ill recently invoked what called the Swiss cheese model of the universe to explain why these supernovae might appear to be moving faster away from us than they really are The universe is made up of lumps of matter interspersed with giant holes or voids somewhat like Swiss cheese In fact last year astronomers at the University of Minnesota Twin Cities reported finding the king of all known voids spanning one           billion light years In other words it would take light which holds the title for fastest stuff in the universe one           billion years to go from one           side of the void to the other The researchers at Fermi said these voids might lie between us and the supernovae being observed acting like concave lenses to make the objects appear dimmer and farther than they really are If so then the supernova might not be accelerating away from us after all Their theory claimed to provide a way in which dark energy might go poof Vanderveld and her colleagues at Cornell University Ithaca N Y looked more closely at this theory and found a few oles The group at Fermi had assumed a bunch of voids would line up between us and the supernovae but Vanderveld group said in reality the voids would be distributed more randomly again like Swiss cheese With this random distribution the voids are not enough to explain away dark energy he lumpiness of the universe could still be tricking us into thinking it accelerating said Vanderveld ut we did not find this to be the case with our best current models of the universe There is however one           other freakish possibility that could mean a void is creating the illusion of an accelerating universe If our solar system just happened to sit in the middle of a void then that void would distort our observations Said Vanderveld t really hard to tell if we e in a void but for the most part this possibility has been ruled out Provided by NASA http www physorg com news149190721 html 부드러운 미소가 암흑 에너지에 관해 우리에게말하는바는 약 10년 전에 과학자들은 놀라운 잠정적인 결론을 내린바 있다 우리의 우주가 점차 빠른 속도로 그 시간이 녹는 치즈와 같이 우주공간속으로 떨어져 나간다는 것이다 우주를 떨어지도록 미는 힘은 여전히 미스테리이며 그것이 정확한지 어째서 흑 에너지 칭하게 되었는지는 알수 없다 하지만 암흑 에너지는 정말 사실일까 우리 우주가 정말 가속 중일까 이런 의문들이 NASA 제트추진연구소 JPL 우주공학 주임연구원 A 반더밸드 Ali Vanderveld 의 생각에 전적으로 달렸다 NASA 제트추진연구소의A 반더밸드 박사 A 반더밸드와 그녀의 동료는 최근에 논문지Physical Review에 치 부드러운 치즈같은 우주 라는 논문을 내면서 거대한 구멍을 관찰하고 우주속에 공간을 만드는 것이 마치 실감나지 않도록 가속하는것 처럼 보였다고 한다 그들이 말한 이런 구멍이나 빈 공간은 암흑 에너지로 떨어지는 것을 설명하기에 충분치 않다 그럼에도 불구하고 A 반더벨드는 리 우주의 매우 기본적인 특성에 대한 의문을 지속하기에 중요하다 고 말한다 때로 우리는 암흑에너지를 받기도한다 반더밸드는 말한다 한 우주가 어째서 점차 빠른 속도로 팽창하는지에 대하여 설명할 수 있는 여러가지 학설들이 있다 어째서 과학자들은 우주가 팽창한다고 생각할까 그 흔적의 대부분은 그리 멀지 않은 근래 십수년간의 연구 과정에서 슈퍼노바 Supernova 로 부르는 거대한 초신성 超新星 이 폭팔하는 관찰에서 온다 이런 광경을 포착한 것은 NASA의 허블 우주 망원경 내부에 있는 JPL의 광구경 행성 카메라2이다 천문학자들은 이미 이런 사실을 지적한 바 있다 그것은 대략 137억년 전 초기 우주의 거대한 대폭팔 Big Bang 이 있었다는 것이다 그러나 학자들은 우주 팽창에 대한 발생율도 알지 못하였고 심지어 점차로 느려질것으로 추측하기도 했다 수십억 광년 떨어진 초신성의 거리를 계산해보고 과학자들은 우주 팽창의 시간적 동작에 대한 이해를 얻게 되었다 그 결과는 난해하다 초신성 너머가 예상보다 어두웠다 이는 이전에 믿었던 것보다더 멀리 떨어졌음을 암시하는 것이다 만약우주가 더욱멀리 있다면 그러면 이는우리와 초신성 사이에 우주 공간이 점증하는 속도로 팽창하고 있음을 의미한다 가속중인 우주에 대한 주목이 있은 이래로 추가적인 연구가 있어오고 있다 What Can Swiss Cheese Teach us About Dark Energy Ali Vanderveld PhysOrg com About 10 years ago scientists reached the astonishing conclusion that our universe is accelerating apart at ever increasing speeds stretching space and time itself like melted cheese The force that pushing the universe apart is still a mystery which is precisely why it was dubbed ark energy But is dark energy really real Is our universe really accelerating These questions hang around in the mind of Ali Vanderveld a post doctoral cosmologist at JPL Vanderveld and her colleagues recently published a paper in the journal Physical Review looking at how giant holes in our wiss cheese like universe might make space look as if it accelerating when it really not They concluded these holes or voids are not sufficient to explain away dark energy nevertheless Vanderveld says it important to continue to question fundamental traits of the very space we live in ometimes we take dark energy for granted said Vanderveld ut there are other theories that could explain why the universe appears to be moving apart at faster and faster speeds Why do scientists think the universe is accelerating A large part of the evidence comes from observations taken over the last decade or so of very distant colossal star explosions called supernovae JPL Wide Field and Planetary Camera 2 on NASA Hubble Space Telescope contributed to this groundbreaking research Astronomers had already figured out that space since its inception about 13 7 billion years ago in a tremendous ig Bang explosion is expanding But they didn know if this expansion was happening at a constant rate and even speculated that it could be slowing down By examining distant supernovae billions of light years away scientists could get a look at how the expansion of space behaves over time The results were baffling The more distant supernovae were dimmer than predicted which would suggest they are farther away than previously believed If they are farther away then this means the space between us and the supernovae is expanding at ever increasing speeds Additional research has since pointed to an accelerating universe A group of researchers from Fermi National Accelerator Laboratory in Batavia Ill recently invoked what called the Swiss cheese model of the universe to explain why these supernovae might appear to be moving faster away from us than they really are The universe is made up of lumps of matter interspersed with giant holes or voids somewhat like Swiss cheese In fact last year astronomers at the University of Minnesota Twin Cities reported finding the king of all known voids spanning one           billion light years In other words it would take light which holds the title for fastest stuff in the universe one           billion years to go from one           side of the void to the other The researchers at Fermi said these voids might lie between us and the supernovae being observed acting like concave lenses to make the objects appear dimmer and farther than they really are If so then the supernova might not be accelerating away from us after all Their theory claimed to provide a way in which dark energy might go poof Vanderveld and her colleagues at Cornell University Ithaca N Y looked more closely at this theory and found a few oles The group at Fermi had assumed a bunch of voids would line up between us and the supernovae but Vanderveld group said in reality the voids would be distributed more randomly again like Swiss cheese With this random distribution the voids are not enough to explain away dark energy he lumpiness of the universe could still be tricking us into thinking it accelerating said Vanderveld ut we did not find this to be the case with our best current models of the universe There is however one           other freakish possibility that could mean a void is creating the illusion of an accelerating universe If our solar system just happened to sit in the middle of a void then that void would distort our observations Said Vanderveld t really hard to tell if we e in a void but for the most part this possibility has been ruled out Provided by NASA http www physorg com news149190721 html

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