Dark secrets: what science tells us about the hidden Universe
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Oct. 26, 2009, Berkeley Lab Science at the Theater: No mystery is bigger than dark energy — the elusive force that makes up three-quarters of the Universe and is causing it to expand at an accelerating rate. KTVU Channel 2 health and science editor John Fowler will moderate a panel of Lawrence Berkeley National Laboratory scientists who use phenomena such as exploding stars and gravitational lenses to explore the dark cosmos. Saul Perlmutter heads the Supernova Cosmology Project, which pioneered the use of precise observations of exploding stars to study the expansion of the Universe. His international team was one of two groups who independently discovered the amazing phenomenon known as dark energy, and he led a collaboration that designed a satellite to study the nature of this dark force. He is an astrophysicist at Berkeley Lab and a professor of physics at UC Berkeley. David Schlegel is a Berkeley Lab astrophysicist and the principal investigator of Baryon Oscillation Spectroscopic Survey (BOSS), the largest of four night-sky surveys being conducted in the third phase of the Sloan Digital Sky Survey, known as SDSS-III. BOSS will generate a 3-D map of two million galaxies and quasars, using a specially built instrument outfitted with 1,000 optical fibers and mounted on the SDSS telescope in New Mexico. Alexie Leauthaud is Chamberlain Fellow at Berkeley Lab. Her work probes dark matter in the Universe using a technique called gravitational lensing. When gravity from a massive object such as a cluster of galaxies warps space around it, this can distort our view of the light from an even more distant object. The scale and direction of this distortion allows astronomers to directly measure the properties of both dark matter and dark energy.
Comments
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I was gobsmacked watching the "intergalactic drive-through" around 23:30 It's awesome to realise those are real galaxies more or less accurately rendered - unlike the front port view in Startrek's USS Enterprise, where it's just an "artist's impression".
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you was right the first time my mind has been Spaghettified!~O:"= but I Love it" .... this is a Fantastic video,! thank you,!
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I express the same as those people here;thanks for put this on.
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That was quite the can of spaghetti/sauce. Everything seems to have duality, and super-symmetry suggests (to me at this point) that dark energy is the flip-side of gravity. I hadn't known about the expansion suddenly speeding up (after the distance exceeded gravitational influence?) I have a gut feeling that the Cosmos always existed, whether multiverse/dimension or whatever else-verse. Nothing comes from nothing and the Big Bang needed fuel and a fuse. Who created God? (besides us, I mean)
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If mass affects space time as stated in the video, what effect might the absence of mass have on space time, Dark matter is stated as the existence of some 'thing' but perhaps it is the effect is the absence of some 'thing' affecting space time and gravity... just a thought.
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excellent video thanks for uploading it
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43,000 views only. So sad. Im really happy I live in a time where I can so easily access information like this. Thanks for uploading this.
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Just to conclude my comment if approved: Your bringing out the idea of space being added to 2 stationary points in your explanation of "inflation" if I understood you correctly, has really given me something to reflect upon. Adding to that the possibility of space being created by dark energy (or dark matter?) for that matter, or possibly "leaked" from an alternative or parellel universe certainly gets an old layman's mind thinking.I now understand what you mean by the universe expanding!
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I would like to give u VERY big thank you for this upload.
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Great
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