Anti-gravity and the True Nature of Dark Energy | Space Time | PBS Digital Studios
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What about dark energy allows it to resist the powerful inward pull of gravity and accelerate the rate of the universe’s expansion? Find out in this episode of Space Time. And watch our previous episodes on dark energy right here: Part 1 - Will the Universe Expand Forever https://www.youtube.com/watch?v=xZTb6... Part 2 - Why the Universe Needs Dark Energy https://www.youtube.com/watch?v=-4Pay... Part 3 - What Does Dark Energy Really Do? https://www.youtube.com/watch?v=RUE_L... Get your own Space Time tshirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g We’ve come a long way in our understanding of dark energy. In previous episodes we’ve looked at how our universe is paradoxically flat and how dark energy is exponentially accelerating the expansion of the universe. In this episode of Space Time we dive into the true nature of dark energy and how its antigravity effect and its other properties are having such bizarre effects on our universe. Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com) Comments James Bailey https://www.youtube.com/watch?v=fsARBnvUB2E&lc=z13pj5mygwqhi3t3k23bfdn5fyf1dbsep Fros7bite https://www.youtube.com/watch?v=fsARBnvUB2E&lc=z135cleyiorcwhuke223ij3wgzbqs50si Patrick Romo https://www.youtube.com/watch?v=fsARBnvUB2E&lc=z13gfr2qkwaezxbu0231ftjxmu3vehuec ArchNME https://www.youtube.com/watch?v=fsARBnvUB2E&lc=z13jfhk5mmjehhxrr04cfd3hivjotdmz1yk0k 1019wc1019 https://www.youtube.com/watch?v=fsARBnvUB2E&lc=z13tjvvqxrapjplrw04ci3453zm2yt3iduk0k Aging Reversed https://www.youtube.com/watch?v=fsARBnvUB2E&lc=z13yyh45ntaft5pjn04cjthwdnrdfrhqwl00k
Comments
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It's funny how you talk in circles. Just say YOU DON'T KNOW! It's clear the universe is a mystery and forever will be.
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In order for dark energy to perfectly flatten the universe it would need to perfectly counter-act each local phenomena within its volume, meaning its density of effect is non-homogeneous and in inversely proportional to the forces applied by those phenomena.
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"dark matter and dark energy".
why do you believe in an imaginary, invisible, undetectable force?
sounds religious to me. -
So, the first law of thermodynamics is broken by Einstein's GR. It is unexpeted, but there is actually no surprise when viewing the combined scene that SR broke the conservation of pure-energy by nuclear fission/fusion, then mass-energy conservation is broken as expected when you expand the crack of energy conservation on to the kinetics of matter by GR. Then all physical laws are broken.
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The idea of energy from nothing is certainly strange.
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The last part of the video the question about space research and cancer research. I would like to add that ,for example, the research on electricity. It has tangible effet now, but when it started (more than a few hundred years ago) it consisted with people rubbing glass rod on silk to see the attraction effect. I am simplifying, but still, it must have look weird for none scientist of that time, but today no one can question the contribution it had it the building of our society.
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Can someone explain how the propagation speed of gravity is accounted for in the expansion equation? It seams that all mass has a finite gravitational sphere of influence due to the speed of propagation of gravity and that would play a role in the expansion. It seams that the detection of gravitational waves would imply that this is true.
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This video taught me how extremely unsmart I am. I had to make that word up to make sense because unintelligent was not 'not smart' enough.
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Wrong
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huh?................
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dark energy must grow out of nothing to keep a constant density in our flat curved space time universe. how many universes must have been created to get one like this one? lucky me to exist in it!
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The first hierarchically property of the Universe is that it is permanently flat at the large scales. There is in place an equilibrium mechanism which SERVES and RESULTS from the first hierarchically property of the Universe is that it is permanently flat at the large scales. There are two opposing groups of forces who serve the grand scale flatness: a. gravity, dark matter and b. dark energy (quantum decoherence). These two groups are SERVING the first hierarchically property of the Universe which is to be permanently flat. Some moron professors who don't deserve their diplomas because are mentally paralyzed claim that the above fighting groups are like a pencil standing on its nose. The correct answer is that dark energy is a result which occurs from the first hierarchically property of the Universe which is to be permanently flat at the large scales. Big Bang is a periodic phase transition of space-time. The mistaken anal insertion of a pencils balancing nose is for retards. When they fuck them hard they lose their balance; thus what one needs is a brain and NOT an anus!
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Very clearly presented, Thank you! IMHO the presentation was brilliant... I can almost understand it! ;)
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so... Dark Energy is kinda like this... if our math wont correspond to the universe, we insert a "magic" variable that fits every gap in the logic and "look for" it until we understand what it actually is
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Wont it be awesome when we come back to these videos in the future and say "hahahaha how stupid were we, it was obvious all along that ____________ and that's why _______________ "
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Is dark energy just a property of a vacuum? Thus if mass distorts space time creating gravity then the absence of mass such as a vacuum creates an anti gravity effect causing the expansion? As more and more vacuum exists as the universe expands, then more and more antigravity effects occur causing further expansion. So dark energy is not energy at all but a relativistic property of a vacuum? Am I making sense or am I just very wrong?
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you lost me dude....i'm not exactly sure when...
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It's interesting how far we've come. When I was a kid everyone was sure that expansion would slow and a big crunch would come. Now we know expansion is accelerating.
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My only question is...huh?
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okay... so why would anyone ever need to know this? lol wut
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