What are dark matter and dark energy?? for beginners!

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  • čas přidán 23. 08. 2024
  • let's learn more about these mysterious substances to better understand why they are significant and what it means for us lil humans!

Komentáře • 42

  • @ModestForce
    @ModestForce Před měsícem +1

    I love physics penguin. Make some merch for yourself with the penguin on it!

    • @JenFoxBot
      @JenFoxBot  Před měsícem +1

      ahaha yayyy happy to hear you enjoy physics penguin! i'm a pretty big fan, too :D

  • @sebastianfeuerstein9306
    @sebastianfeuerstein9306 Před měsícem +3

    Man, I just love how animated you are! 😂

    • @JenFoxBot
      @JenFoxBot  Před měsícem +1

      I really, really love this stuff 😄

  • @jbsnyder1736
    @jbsnyder1736 Před měsícem +3

    I'm a simple man .....

  • @toolzshed
    @toolzshed Před měsícem

    So many hidden (dark) treasures in the universe left to find 😊

    • @JenFoxBot
      @JenFoxBot  Před měsícem +1

      yes!! so many beautiful mysteries!

    • @toolzshed
      @toolzshed Před měsícem

      @@JenFoxBot it makes me think of that thought experiment about 2d beings not understanding 3d space because it's hidden to them

  • @emanuelaguilar1891
    @emanuelaguilar1891 Před měsícem

    wait a sec.. You are a brilliant sky

  • @mangalover9000
    @mangalover9000 Před měsícem

    Maybe we need to know the underlying mechanisms behind gravity and quantum phenomena first and it will be our foundation of physics.

    • @JenFoxBot
      @JenFoxBot  Před měsícem

      "spooky action at a distance" was einstein's comment about quantum coupling, different stuff! (in fact, some folks just won a nobel prize in physics for discoveries around this!)
      Janna Levin's theory is that gravity is a manifestation of all the particle interactions on a quantum level which could potentially warp spacetime over very, very large distances. e.g. if you have a large collection particles like a planet or sun, you get a lot of mass and thus a lot of interactions in spacetime.

    • @mangalover9000
      @mangalover9000 Před měsícem

      @@JenFoxBot "Spooky action at a distance " why einstein hate Quantum Mechanics for describing reality, related to quantum entanglement but the underlying mechanism behind the probabilistic of quantum particles were not related. So the question is what is the cause of it and also the cause of gravity.
      Emergent from quantum particles like Janna Leyvin said is not new to physics it just happened she said it at startalk with 1million of subscribers and viewers which get the attention of the media.

  • @jamesmiddleton8128
    @jamesmiddleton8128 Před měsícem

    If u could, theoretically, convert all the (missing/dark) energy in the universe into mass, would it be more massive and, therefore, more dense? Also, do you think the distances involved could affect our observations of these dark forces? I am undereducated, not derisive, promise. Generally interested in your opinion....

    • @JenFoxBot
      @JenFoxBot  Před měsícem

      good q! technically, dark matter *is* mass! it's just mass that doesn't interact with the electromagnetic spectrum, i.e., it's invisible to us.
      the huge scales do make it challenging to detect and measure these kinds of things, but astronomers are supes clever and have lots of different mechanisms!
      a cool recent article: www.science.org/content/article/model-ever-expanding-universe-confirmed-dark-energy-probe

  • @Antidemonn
    @Antidemonn Před měsícem +1

    In my opinion dar matter is a result of a huge miscalculation that comes out as an output of our theories that are prolly inaccurate at large scale. Either that or since dark matter is always observed around a blackhole, maybe it's coming from another dimension like there are universes in which gravity works upwards.

  • @tylerwright3950
    @tylerwright3950 Před měsícem

    Your my new most favorite person ever. Thank you 😊

  • @padraiggluck2980
    @padraiggluck2980 Před měsícem

    So there’s time dilation at the far reaches of the observable universe.

    • @JenFoxBot
      @JenFoxBot  Před měsícem

      Time dilation happens for any object moving close to or at the speed of light!

    • @padraiggluck2980
      @padraiggluck2980 Před měsícem

      @@JenFoxBot If you apply an average value of 70 km/s/mpsec to 13.8e9 ly you will find that the galaxies at the far reaches of the observable universe are receding at a speed of 2.96e5 km/s.

  • @drwsldrt
    @drwsldrt Před měsícem

    Love these videos, and you've been covering integrating gravity in quantum mechanics lately. I have a video exclaiming 1/27 is the 3D quantum rate of gravity (1/4 being 2D and 1 being 1D) and how this can solve Yang-Mills Mass Gaps and further understanding of what the Riemann Hypothesis is saying. sorry to self promote, but if you ever had an hour would you watch and give feedback? Love these videos and they help my very poor physics and math communication.

    • @drwsldrt
      @drwsldrt Před měsícem

      I've been getting roasted for it but I truly believe in it. Especially with the constants I pull at the end with Koide's Equation and the Earth and Moon's gravity. It seems like you and many people have integrating gravity in the situations on the brain and in the zeitgeist. Thanks if you read this!
      czcams.com/video/bAB6Y0DOmZg/video.htmlsi=hvisQQjWPtF2C-qA

    • @drwsldrt
      @drwsldrt Před měsícem

      Also dark energy, dark matter, mass and energy conversion. Imagine if all of this was the energy and matter from mass gap collisions across the universe. How could massless particles like photons in light make mass gaps?
      1/27 is just as important to gravity as π is to circulation.

    • @JenFoxBot
      @JenFoxBot  Před měsícem +1

      first, to quote feynmann, extraordinary claims require extraordinary evidence. if you're the only (or one of very, very few) ppl making these claims, it's important to be humble and exhaustive about your theory/experiments.
      i'd also say that YT isn't a good place to promote unverified theories - that's what scientific papers are for! publish your work so others can replicate and verify it (or not).

    • @drwsldrt
      @drwsldrt Před měsícem

      @@JenFoxBot yes ma'am, thank you for the comment and reply!
      It's the implementation of Koide's Equation and Yang-Mills that makes it all the more interesting yet all the more harder for a rookie to explain. It seems the best option is how I'm told, make a bulletproof paper on it as best as I can with the help of professionals. Especially if I'm claiming P=NP in an algorithm, it's almost embarrassing because the entire thing can be seen as delusional since the majority believe P=/=NP. Once again thanks for even replying and reading!

    • @drwsldrt
      @drwsldrt Před měsícem

      Not only do I relate Yang -Mills 3D Hamiltonian Perturbation to the lattice Perturbation, but Koide's Equation and the rates 1 (1D), 1/4 (2D), and 1/37 (3D gravity) work too well with the 2/3 constant from Koide's Equation to give the exact electron permittivity per energy level.
      And the internal temperature in Kelvin of planetary bodies works very well with 1/27 to give us accurate rates of gravities we know like 9.8 for the Earth and 1.6 for the moon.
      Anyways, sorry for the self promote. Love these videos especially since you've been dealing with integrating gravity into quantum mechanics. This seems to be a big goal right now in the physics community. Once again weird coming from a rookie but I'm using Edward Witten and other's math to reap actual constants.

  • @hippie-io7225
    @hippie-io7225 Před měsícem

    That 95% number is very important. All of us that think we know something, have very good odds that we are wrong. Also, "kooky people" (with non-contemporary ideas and observations) have a larger probability of being correct.

    • @ericmedlock
      @ericmedlock Před měsícem +1

      Nothing about what you say means that kooky people have a higher chance of being right, that's not how epistemology works

    • @hippie-io7225
      @hippie-io7225 Před měsícem

      @@ericmedlock Epistemology is a cool word. Thanks.

    • @JenFoxBot
      @JenFoxBot  Před měsícem +1

      i love the acknowledgment that humility is super important! e.g. max planck discovered black body radiation, which challenged the notion of light as a wave. he spent like, 10 years, retrying his experiments before he finally decided to share it with his colleagues!

  • @Ramanujanschoolofphysics
    @Ramanujanschoolofphysics Před měsícem

    Vacuum Energy

  • @robertbarber7986
    @robertbarber7986 Před měsícem

    Well, I love this stuff, but it's a bit over my head. I like your style. I wish more people would admit we aren't entirely sure how the universe works. Anybody can be an expert, and really, really smart, but still admit that. I'm kind of keeping an eye on people who talk about dark matter. I'm not bought in yet (I know it's taken as a give in the physics community), but I haven't checked out yet either. I'm just kind of keeping an eye on developments. I tend to be skeptical of things we can't touch or see, but who knows? Something must explain the problems we see with the models, and dark energy and dark matter are as good an explanation as any.

    • @JenFoxBot
      @JenFoxBot  Před měsícem

      great comment, totally agree that it's so important to acknowledge limitations of knowledge! (insert philosophical comment about 'what is a fact anyway').
      that said, dark energy and dark matter don't necessarily have to do w/ the problems we see in QM or Relativity. Both concepts are observations confirmed via multiple methods but don't have any confirmed theory to match the observations.... yet :)

  • @williamschacht
    @williamschacht Před měsícem

    The fission-fusion bombs show that it's "easy" to convert mass into energy. I'm waiting for the Star Trek replicators. 🙂🙂
    I'm still not convinced that dark matter really exists. Why isn't it in our local neighborhood? In my naive opinion, I think that they are missing some crucial parts of the calculation etc.

    • @JenFoxBot
      @JenFoxBot  Před měsícem

      hah! yes, good pt re: fission-fusion bombs as an example of mass being a form of energy. I also want a replicator, in the meantime, 3D printers are pretty rad 😄
      DM only shows up on very, very large scales so it doesn't affect us much here on earth. The particle theories of DM (which are currently up in the air) indicated that in 1 m^3 of volume, a DM particle would collide with a "regular" particle once a year (aka VERY very rare).
      that said, if the more plausible theories of DM don't turn up anything (i.e., particle theories), the effects of DM could suggest a missing piece of our theory of gravity.. so, maybe!

  • @Antidemonn
    @Antidemonn Před měsícem

    Jamesweb will rewrite all of ur scientific books lol

    • @JenFoxBot
      @JenFoxBot  Před měsícem +1

      james webb telescope definitely is giving us phenomenal data to explore and probe more of the universe!! so stoked on that collab.
      and also, it is unlikely to rewrite our textbooks, more likely to be additive. (insert parable of blindfolded ppl touching diff parts of an elephant and not seeing the whole picture)

  • @ModestForce
    @ModestForce Před měsícem

    Also, lovely video! Keep it up!

  • @shawns0762
    @shawns0762 Před měsícem

    There is no dark energy. There is only one reason to postulate it, to explain the exponential expansion rate of the universe. The expansion was discovered in 1929. In 1998 it was discovered that the expansion is accelerating, this is when the concept of dark energy became mainstream.
    If something accelerates at a constant rate it will get faster and faster. If a ship travels at a constant 1g acceleration rate it would achieve about .95% light speed in 1 year. Electricity is drawn towards potential and the universe as a whole behaves the same way. Electricity comes into our homes because the neutral circuit provides the potential. Electricity is drawn towards grounding rods for the same reason.
    Physicists in the last century did not postulate dark energy because they understood that the expansion is a fundamental property of the universe. The fact that the expansion is accelerating does not invalidate their reasoning, it's what the known laws of physics would predict provided gravitational forces are not strong enough to counteract the process.
    All studies to find dark energy have been fruitless because it doesn't exist. to say there is dark energy is to say there is 5 fundamental forces there is 4.

    • @JenFoxBot
      @JenFoxBot  Před měsícem

      To quote Feynmann: extraordinary claims require extraordinary evidence!
      the evidence to support the concept known as dark energy is pretty substantial. Knowing what it *is* is a different question.

    • @shawns0762
      @shawns0762 Před měsícem

      @@JenFoxBot Almost every physicist in the last century did not believe in dark energy for the reasons I stated including Einstein, Plank, Bohr, Schrodinger, Dirac, Heisenberg, Feynman etc. it's not a matter of opinion, it doesn't exist