「dark matter」に関連した動画の一覧

	NOVA scienceNOW | The Dark Matter Mystery | PBS  www.pbs.org We can't see dark matter, and some skeptics doubt its existence, but many scientists think it makes up 20-some percent of our universe. Astronomer Doug Clowe explains how the Bullet Cluster, a group of galaxies billions of light years away, may shed some light on this mysterious stuff. Don't miss the new season of NOVA scienceNOW, airing every Wednesday at 9pm starting June 25 on PBS. Watch past episodes of the program, try out interactives, and more on our Web site: www.pbs.org 2008年06月24日再生回数 257831
	Minute Physics: What is Dark Matter?  Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in one minute! In this episode, we discuss Dark Matter, an exotic type of matter we know very little about, despite the fact that it makes up around 80% of all matter in the universe! 2011年07月07日再生回数 1519649
	Michio Kaku: What Is Dark Matter?  bigthink.com The answer to this question is at the cutting edge of science, but one theory states that dark matter is nothing but ordinary matter in another dimension hovering right above us. 2011年06月01日再生回数 107142
	The Dark Matter & Dark Energy [1/5]  Dark matter are invisible objects that react with matter by gravitational force. Scientists believe that the dark matter is made up of exotic particles like WIMPs(Weakly Interacting Massive Particles).In physical cosmology, dark energy is an exotic form of energy that permeates all of space and tends to increase the rate of expansion of the universe.Dark energy is the most popular way to explain recent observations that the universe appears to be expanding at an accelerating rate. In the standard model of cosmology, dark energy currently accounts for 73% of the total mass-energy of the universe. 2008年08月09日再生回数 156985
	The Dark Matter Mystery: Stars Are Moving Too Fast  www.facebook.com ... The Mystery of Dark Matter (Chapter 1/4): Stars Are Moving Too Fast. A mystery exists! Galaxies do not seem to have enough mass for stars to orbit at their observed speeds. Galaxies should be flying apart, but they don't. Why not? Explore the surreal world of dark matter - one of the universe's greatest mysteries. --- Please SUBSCRIBE to Science & Reason: • www.youtube.com • www.youtube.com • www.youtube.com --- Shedding Light on Dark Matter Over the last few decades, physicists have discovered that around ninety percent of every galaxy in the universe is made of an unseen substance called dark matter. Damian Pope, PIs Senior Manager of Scientific Outreach, comments, Its currently one of the hottest topics in physics. The module provides teachers with tools to show how dark matter was discovered, to explain why it remains a mystery, and to share the passion of scientists who are trying to discover what its made of. • www.perimeterinstitute.ca --- In astronomy and cosmology, dark matter is a form of matter that is undetectable by its emitted electromagnetic radiation, but whose presence can be inferred from gravitational effects on visible matter and background radiation. According to present observations of structures larger than galaxies, as well as Big Bang cosmology, dark matter accounts for the vast majority of the mass in the observable universe. Dark matter was postulated by Fritz Zwicky in 1934, to account for evidence of "missing mass" in the ... 2010年03月08日再生回数 66939
	Andrew Bird - Dark matter  From the album "Armchair Apocrypha" (2007) When I was just a little boy I threw away all of my action toys I became obsessed with operation, oh Hearts and minds and certain glands You got to learn to keep a steady hand And thus began my morbid fascination Tore all the spines out from all of these self-help books Made myself a gun that not only shoots but looks real Yeah it shoots through steel with rays of dark matter Rays of dark matter Just the thought of all this red and black Thought of tongues that tasted bad Fill you with the nausea-ausea-ausea-alation Do you wonder where the self resides Is it in the head or between your sides And who would be the one who will decide it's two locations The noose is loosed around our necks made of DNA And everyday it's growing tighter, no matter what you do or say But you can shoot right through with rays of dark matter Right before they kick out, they kick out the ladder Rays of dark matter When I was just a little boy I threw away all of my action toys I became obsessed with operation Hearts and minds and certain glands You got to learn to keep a steady hand And thus began my morbid fascination 2008年05月17日再生回数 170026
	Dark Matter, Dark Energy and Inflation: The Big Mysteries of Cosmology  Dr. Michael S. Turner, Professor, Kavli Institute for Cosmological Physics, University of Chicago. Presented Feb. 15, 2011 Our current cosmological model describes the evolution of the universe from a very early burst of accelerated expansion (known as inflation) a tiny fraction of a second after the beginning, through the assembly of galaxies and large-scale structure shaped by dark matter, to our present epoch where dark energy controls the ultimate fate of the universe. As successful as it is, this model rests upon three mysterious pillars: inflation, dark energy and particle dark matter. All three point to exciting and important new physics that have yet to be revealed and understood -- or possibly, to a fatal flaw in the paradigm. The University of Arizona College of Science's Cosmic Origins lecture series is the story of the universe but it's also our story. Hear about origin of space and time, mass and energy, the atoms in our bodies, the compact objects where matter can end up, and the planets and moons where life may flourish. Modern cosmology includes insights and triumphs, but mysteries remain. Join the six speakers who will explore cosmology's historical and cultural backdrop to explain the discoveries that speak of our cosmic origins. cos.arizona.edu 2011年02月23日再生回数 23995
	Porcupine Tree - Dark Matter  Artist: Porcupine Tree Song: Dark Matter Album: Signify 2009年05月13日再生回数 257359
	Dark Matter 3D Map  COSMOS Video News Release For the first time ever, astronomers have been creating a three—dimensional map of how the dark matter is distributed across the Universe. An international team of scientists, among them groups from Marseille, the Max-Planck Institutes and Paris have been using data from the NASA/ESA Hubble Space Telescope. The results are published in nature online of 8 January 2007, and at the meeting of the American Astronomical Society in Seattle. This Video News Release discussed this discovery. More on: www.spacetelescope.org 2007年05月29日再生回数 144380
	Narrowing the Search for Dark Matter  Watch this and other space videos at SpaceRip.com Scientists have further narrowed the search for a hypothetical particle that could be dark matter, the mysterious stuff that makes up 80 percent of all the mass in the universe. This video from NASA Astrophysics presents the new results, compiled from two years' worth of data from NASA's Fermi Gamma-ray Space Telescope. Gamma rays are very energetic light, and the telescope looks for faint gamma-ray signals that are generated by a variety of sources, such as gas and dust spiraling into supermassive black holes or exploding stars. But another potential source of gamma rays is dark matter. Although no one is sure what dark matter is, one of the leading candidates is a yet-to-be-discovered particle called a weakly interacting massive particle (WIMP). When two of these WIMPs meet, the theory goes, they can annihilate one another and generate gamma rays. There are many possible versions of WIMPs, and they're expected to span a wide range of masses, producing a range of gamma rays with different energies. Using Fermi, the scientists focused on 10 small galaxies that orbit the Milky Way, searching for gamma-ray signals within a specific range of energies. They found no signs of annihilating WIMPs, which rules out certain kinds of WIMPs as dark-matter candidates. 2012年04月06日再生回数 40288