Is Dark Energy Getting Stronger?

  • Published on Mar 20, 2019
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    The power of Dark Energy may be increasing as the universe ages. Subtle clues are emerging that the accepted model for the nature of dark energy and dark matter may not be all that. We saw the first such clue recently in our recent episode on the Crisis in Cosmology. Today we’re doing a Space Time Journal Club to reveal another clue. We’re looking at a new paper in Nature Astronomy, “Cosmological constraints from the Hubble diagram of quasars at high redshifts” by Risaliti and Lusso. It hints that the cosmological constant may not be so constant after all. In fact it may be increasing. If this is true, then our prediction for the future of our universe looks VERY different, and may involve the entire universe tearing itself to shreds at the subatomic level in the Big Rip.
    On this edition of Space Time Journal Club we look at:
    Risaliti & Lusso (2019) "Cosmological Constraints from the Hubble Diagram of Quasars at High Redshifts"
    #darkenergy #darkmatter #spacetime
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Comments • 1 790

  • RitaSparita *
    RitaSparita * 2 days ago

    I think I'm guna get myself an 'end is nigh' sandwich board anyway😂😂😣

  • Fanboy 3k
    Fanboy 3k 8 days ago

    First time I've heard of the exponential increase in the strength of Dark Energy and the inevitable "Big Rip", sounds horrific.

  • Ann Knipp
    Ann Knipp 8 days ago

    If redshift detects expansion of the universe, could it also detect if the universe itself is also rotating while it is expanding? Could that explain extra long redshifts?

  • Super Paw
    Super Paw 12 days ago +1

    i have a dark energy blunt been smoking it for a while goes on forever n just expands more and more

  • Uranus 2
    Uranus 2 14 days ago

    I wonder what kind of technologies would be possible, if we found out what dark energy actually is. If it actually is an anti-gravity force, what could we possibly do with it?

  • Reigh
    Reigh 20 days ago

    What if dark energy is just an opposite mathematical pull to the attraction of gravity so that as gravity weakens over larger spaces the space between allows us to be more easily pushed or actively pushed away by the space between as if the space is like a higher pressure system?

  • Throgar Yo
    Throgar Yo Month ago

    i say there is no dark energy or dark matter. its just not yet understood spacetime effects.
    one thing that seems to be underrated is the point of view.
    another the assumption that there was no time before the big bang.
    for sure, in an singularity time seems to be non existent. maybe its just unmeasureable slow. i also dont believe that singularites are super dense tiny spots,
    i think singularities are as big as their event horizon goes.
    since black holes are singularities, and might have no measureable time behind the event horizon it doesnt mean there is no time and space outside of them. we actualy live to see that there is spacetime around.
    well, the opposite of a singularity would be complete empty, unlimited space with unmeasureable fast time.
    i believe thats what one could say is dark energy.
    matter at the empty edge is moving into unmeasureable fast time, slowing it down, spreading out. it means the more it spreads, the less is the effect of slowing down, or watching from one spot, it looks speeding up.
    now i come to dark matter. its the opposite effect of dark energy. the misinterpreted gravitation is caused by time slowing down in higher dense areas.
    its such effects that in my understanding causes matter to rotate.
    as example, the matter inside earth is more compressed than on the outside. it means the earth core is slowed down in time, while the outside time goes faster.
    it also means the space is compressed increasingly the further you go to the core. thats why things move faster the further you go away from the core:
    i see spacetime also as something that can undergo the physical states influenced by gravity.
    no gravitational effects from mass = no spacetime (better, unlimited space and unmeasureable fast time)
    thin mass spread around = gas (takes large space, measureable time)
    compressed mass = liquid (like gasclouds)
    higher compressed mass = solid (like planets, stars)
    singularity mass = plasma (black holes, unmeasureable slow time)
    i think all this could also explain, why there is an observeable universe.
    while the matter spreads out in the unlimited space with unmeasureable fast time, we are also in the grip of singularities(and their gathered surroundings combined gravitation), that slows us (on our pov) down in time, what also could give the illusion that things further away move away at an increasing speed. it could just mean, that we someday at our pov/spot will be sucked into a singularity.
    now i want to jump to white holes.
    i think that white holes are black holes that just exploded. call it a big bang.
    for me its an ongoing process. if you could sit in tiny spot in the unlimited space with no measureable fast time, causing no gravitational effects with super low mass, you might see universes born and expanding like fireworks.

    i also think that light/photons are not massless.
    photons might have an (for us) unmeasureable small smass or at some point, energy somewhat equals mass.
    thats why the speed of photons is ~ 300000 km/s.
    if mankind in future will be able to travel space by manipulating gravity, enabling us to travel faster then the speed of light, without the effects of time dilation, we could travel to the observable edge of the universe. and i bet that we will see just more galaxies appearing the further we move. and maybe, if there realy is an edge to the unlimited void, we could travel into it and see extreme time dilation effects.

    those are things im constantly thinking around for years, and its hard to write down my thoughts. it also changes the more i read about space and time. this all is also just my theory.

  • Prashant Bharadwaj
    Prashant Bharadwaj Month ago

    If dark energy is getting stronger (accelerated expansion of universe), where is may get energy from? Does it violate the laws of thermodynamics?

  • Colbert Philippe
    Colbert Philippe Month ago

    Can you make a show to explain how the force behind Dark Flow can affect galaxies over such huge distances? According to Albert Einstein theory of relativity with respect to gravitational force, isn't Dark Flow a sign that space has a huge sinkhole spread out of a huge distance and it creates Dark Flow? Space is not flat!

  • Kenny Carter
    Kenny Carter 2 months ago

    Id prefer a big rip over big freeze, thats just me through

  • Naum Rusomarov
    Naum Rusomarov 2 months ago

    Interesting paper, but I don't quite buy the averaged out values of z-M. The error bars are pretty huge of the measurements themselves and the difference between the currently accepted Lambda=Const. model and the empirically derived Lambda seems within 2Sigma of each point. It'd be really nice to see similar analysis based on much better data.
    p.s. Thanks for the videos. Great stuff.

  • Ethan Franzen
    Ethan Franzen 2 months ago

    How do you explain the Big Bang with a constant Λ, anyways? Was Λ gigantic enough at the Big Bang to rip quarks apart?
    Is Λ just a dial on God's controller that can be changed, freely or is it programmed to evolve to keep the universe flat?

    Does an empty vacuum with nothing in it evolve over time, when dark energy is considered?

    Even in a flat universe, couldn't parts be hyperbolic and some hyperspherical? Could enough black holes in one spot close part of an otherwise flat universe off, making a hypersphere? How would that work or would this be the definition of inside an event horizon?!?!!

  • KirchDub L
    KirchDub L 2 months ago

    We know objects close to black holes are experiencing tidal forces which as result torn apart this object. This effect getting stronger and stronger as body is getting closer and closer to the black hole. Now let's assume this body is our universe falling into gigantic black hole which is outside of our observable universe and of the size many many times of our universe (million times). From our perspective we will see our universe (body) experiencing Big Rip and this effect is getting bigger and bigger with time

  • jake hensley
    jake hensley 2 months ago

    maybe our universe is just in a transition of phase, similar to liquid to gas.

  • Jainal Abdin
    Jainal Abdin 2 months ago

    Has any theory considered the Universe as having poles? What I mean by this is something like the North and South poles of a planet but on a universal scale. Consider each universal pole to be analogous to a black hole and a white hole, where we see a rapid expansion from the 'big bang' as the white hole pole, and the distant observable universe accelerating away from us into a distant 'big crunch' as the black hole pole. A gigantic structure that spans beyond our observable universe, but we only see a local phenomenon of the observable universe expanding away from us and we try to explain this with Dark Energy?

  • James Collins
    James Collins 2 months ago

    Please Matt, stop saying brightness when you mean luminosity.

    • James Collins
      James Collins 2 months ago

      @The Real Slim Brady, actually that is not true. The terms have two different meanings. They are related to each other. but they have different purposes. You most likely will refuse to believe me so watch David Butler; he will explain it with more authority.

    • The Real Slim Brady
      The Real Slim Brady 2 months ago

      same difference

  • gary schraa
    gary schraa 3 months ago

    Dark energy is that which keeps space from being sticky . It's a lubricant or surfactant . Of course I cant prove this as I am not a scientist , I am a bone head ______ not a melon head

  • Stan TheObserver
    Stan TheObserver 3 months ago

    Can or will dark energy rip itself to nothingness one day?

  • HolyWrath
    HolyWrath 3 months ago

    I believe dark matter is ocilating.

  • jackay k
    jackay k 3 months ago

    Dark matter and dark energy are real but it's for heaven or maybe earth also not for humans may be it's like flesh of heaven but it's also exist in earth another form or face or colour if it passes by you you feel massless Ness vaccum nausea in your mind that's what we know as a Muslim but I won't tell the full truth to call me mad religion dog .but it's not hand of god or any any type of part of god .

  • Faizan Shaikh
    Faizan Shaikh 3 months ago

    I woke up. I watch new video and I start my day

  • Kevin McMahon
    Kevin McMahon 3 months ago

    It is strange that Space-Time is expanding in the space between the Galaxies, but not the space within the atom. Are gravity wells the least likely place to find Dark Energy and Dark Matter?

  • Adam Watts
    Adam Watts 3 months ago +1

    I love how well you brought an academic journal article into means that most layman like myself with just a general interest in physics and cosmology can understand! Thank you. please do some more!

  • N L
    N L 3 months ago

    There's a lot we don't understand, but it's pretty clear that dark energy is not a constant. It doesn't mean it will increase forever though.

  • Christian Anderson
    Christian Anderson 3 months ago

    What we see in the visible observable universe is what they was millions and billions of years ago at this current time now everything must be gone anything that is 500 million light years or more away think about it if light took a half a billion years to get here or 100 billions light years away those objects no longer exist in theory maybe that's why we see the expansion of the universe speeding up we could be in a totally empty cold universe where the light we see from so far away those objects in are currently space time no longer exist in theory

  • viod vue
    viod vue 3 months ago

    "The great courses plus" Plus what?

  • Charles Rockafellor
    Charles Rockafellor 3 months ago

    The material is good material, the presentation is professional and concise... but while the words are dead-on, the cadence and body language argue from rhetoric. PBS Space Time always _feels_ like a snake oil sales pitch, even given the otherwise accurate data. :-(

  • Motesoul
    Motesoul 3 months ago

    10:30 ZIPF

  • jhwheuer
    jhwheuer 3 months ago

    So in other words... if something changes the light of the standard candles unexpectedly, all our measurements are off...

  • Dobby Dazzler
    Dobby Dazzler 4 months ago

    Always awesome, always inspiring. Thanks SpaceTime xxx

  • Glenn Babić
    Glenn Babić 4 months ago

    Those two Nobel winning teams that 'wrote the text book on dark energy' (as you put it) in the early 90s, overlooked the most ubiquitous cosmological quality, neglecting to include it in their calculations, which would have shown that universal expansion was SLOWING not increasing. Yes now everyone takes their findings as Gospel. What a cosmological cock up!

  • // nostromov
    // nostromov 4 months ago

    Yeah, ok, but, it's "supernovaS"

  • Mr Mellon
    Mr Mellon 4 months ago +1

    I wonder if space isn't expanding, but "falling" outwards. Local gravity may have slowed the falling rate early but just like gravity from matter, spacetime is falling like the center of gravity is just outward. I wonder if that could be calculated

  • mastrtonberry2
    mastrtonberry2 4 months ago

    I like all the Star Trek SFX

  • David Fuller
    David Fuller 4 months ago

    Shamanistic Witch Doctor of Physics Jargon

  • Accutronitis The 2nd
    Accutronitis The 2nd 4 months ago

    This channel never fails to expand my knowledge of our universe!

  • Matt Woodruff
    Matt Woodruff 4 months ago

    You guys have great content but a terrible intro song. You need something more pumped up and melodic.

  • ijams sum
    ijams sum 4 months ago

    They make incorrect assumptions looking back thru time 14-15 billion years ago matter and the laws of physics operated the same as now with no dilation ?
    Looking back at the early universe it should be expanding fast from the big bang and slowed down later by gravitational forces of mass when gravity was established !
    There is no dark matter energy only the universe before physical laws were fully established and what they see happening back then is not the laws today, change set in over some time !
    The early universe had little matter to absorb the great energy from the beginning , later the mass assumed physical laws of attraction and absorbed the energy to slow down the Galaxies enough to be stable !
    What they are seeing is not even happening today , its 15 billion years ago !
    No intuition in science is used only cold incorrect math lacking all the laws of the universe !
    Only some laws are known , we are infants at cosmology as intuition has been left behind and no insight is used in science academia in cosmology today and they are more lost than they ever hoped to be lol !
    Corona Fusion is the correct theory of our Sun not core fusion and the data is right in front of them but they are blinded by a failed theory to protect science academia from being very wrong from the start ?
    Cosmology is a farce in many areas and it takes genius to invent a invisible energy dark matter to explain away there failings because you cannot disprove the invisible !
    See how science academia works , so now they say it takes 40,000 years for photons at our Suns core to reach the surface of the Sun to explain away the very low surface temperature on the Sun ????
    Genius to invent a theory to protect your failed theory so the public cannot see the mistaken theories in our textbooks ?
    Once you wake up and see the truth you see how little we know and how what has been portrayed as fact is false science and still in textbooks !
    No morals allowed because science must be protected from itself by inventing theories that cannot be disproved !
    Dark Matter is just such a invention , because they are lost without a clue of intuition ?
    Dimensional travel and traveling past the speed of light is possible , but you must create a field around a craft the blocks subatomic entanglement that lets the craft have zero mass in our space dimension and blocking our physical laws is all it takes but few people can even think this is possible ?
    Once you see a UFO your mind opens up very much , and the reality sets in we are to be deceived completely from the truth as science has zero morals !

  • Chad Davis
    Chad Davis 4 months ago

    I think that there could be a possible error in the interpretation of the redshift increase from the quasar measurement, the dark energy being observed getting stronger around using these quasars could be the black hole expanding space by condensing energy to negative energy. There must be a way to measure this dark energy increase in relation to a few relative nearby black holes to one another and the red shift observed between there varying masses and amount of matter being consumed via the size of its accretion disc, assuming that something will be observed by this would give us an approximation of how much new space/dark energy is being created from the amount energy being converted in s black hole

  • Nicholas Pdx
    Nicholas Pdx 4 months ago

    How are you accessing my phone? I see you too..

  • SpazamZ YT
    SpazamZ YT 4 months ago

    This is the time that we need Thanos to get on the good sid

  • Tweety pie
    Tweety pie 4 months ago

    Out of curiosity, Has dark matter been found in galaxies that DONT have super massive black holes?

  • Philip Moran
    Philip Moran 4 months ago

    Gravity can be explained if everything expanded by 1/1000th per second!

  • Kane Morison
    Kane Morison 5 months ago

    Dark Energy maybe from the collapse of the first big 3 stars into black holes theses black holes having eaten all the local matter around. Collapse explode fragment into pockets of collapsing Matter Dark Energy just a guess way off

  • vivalafiaga
    vivalafiaga 5 months ago

    What if the entire universe is simply descending into an unimaginably huge black hole?

  • Bangla Desh
    Bangla Desh 5 months ago

    "Dark energy" is just the positive curvature of spacetime in the absence of mass on large scales directly proportionate to the density of mass on galactic scales. It's kind of counter intuitive but I've done all the calculations and wrote 2 papers on it, but 6 journals have refused to publish my work as they're invested in other theories. True story.

  • Matlockization
    Matlockization 5 months ago

    Dark energy is not getting stronger but darker !

  • Derrick Bommarito
    Derrick Bommarito 5 months ago

    What would the universe look like (besides very dark) to the last remaining animals when a big rip changes the universe enough to become observable? What new chemistry might result that becomes dominant over what I would expect to be a very long period of slow atomic tearing? Does the big rip result in everything inevitably turning itself into WonkaVision static?

  • Brett Augustine
    Brett Augustine 5 months ago

    Is that a cockmonaut on your shirt?

  • GIJosh
    GIJosh 5 months ago

    Next April 1st, they need to make a video that asks a question, and answers with "yes" or "no", then end the video.

  • Waizwaid Arenosa
    Waizwaid Arenosa 5 months ago

    I love this guy; I don't believe he is human; he is too advanced. Nevertheless, I love him. I can listen to him forever.

  • Cerberus
    Cerberus 5 months ago

    I think Entropy is definitely getting stronger.

  • Arun Sasi
    Arun Sasi 5 months ago

    Very hypothetical question! Assuming lambda is not uniform across space, will relative expansion of space have relativistic effects on each other?

  • Harry ToyShirt
    Harry ToyShirt 5 months ago

    So much for "dahk" energy. Someone send a boatload of R's to the Brits.

  • nope sorry
    nope sorry 5 months ago

    spacetime tearing itself to shreds on the subatomic level... well that certainly would be a big R.I.P

  • Gabrielle Grandcamp
    Gabrielle Grandcamp 5 months ago

    WHAT IF there was no dark energy at all, like the gravitation isn't a force but more like a propriety of the structure of the space time universe, I'm wondering, what if what we call dark energy is in fact the response of the space time fabric to gravity, like if I put a finger on a baloon, if i press hard, outside this zone of the pressure caused by my finger, the balloon is expanding, so maybe, the expansion is accelerating because there are nothing to stop this expansion, unlike the balloon. So the filaments of galaxies is in fact valleys in a 3d space, caused by the mass of the galaxies themselves, galaxies "squeezed" by monts of void (or less dense universe) created in consequence of their mass pushing on the space time fabric, like fingers on a balloon ?
    (sorry I'm french, I hope I'm a bit comprehensible)
    and it's like an answer of the period the universe didn't expand, the space was not enough big to permit the creation of valleys caused by gravity

    and maybe, maybe, the acceleration of the expansion is caused by what black holes do in the space time fabric, an expansion fuelled by the infinite mass in the center of the black holes ?

  • Dom Trussardi
    Dom Trussardi 5 months ago +1

    If there was a "NIgga...the hell you talkin bout?" meme, this guy would show up in half of them.

  • J Bay
    J Bay 5 months ago


    ALT SOLUTIONS LIMITED 5 months ago

    Any energy has quantitative and qualitative characteristics. Stronger or weaker is just the degree of impact in a certain place on a certain object. It is more reasonable to talk about the quality of energy and its use in real life. Accordingly, management of this energy.

  • ofsinope
    ofsinope 5 months ago

    That moment when he says "spacetime" at the end