Big Bang (before & after), Dark Matter and Dark Energy: a breath-taking story of our Universe.

[@PhysicsMadeEasy]

Dark matter accounts for more than 80% of all matter that populates the spacetime of our Universe. What is dark matter, is one of the most troubling mysteries in astrophysics and cosmology. Let's investigate this together! kzbin.info/www/bejne/e3y4qmSaeZahia8

[@desmomdattimu5692]

You're the best

[@arunkumard7479]

Thanks for sharing this information 🙏

[@HadiAhmadi-m1i]

your voice got me having goosebumps

[@PhysicsMadeEasy]

Oooh, first time someone tells me something like that haha! Thanks for letting me know, now I might apply for dubbing Halloween movies haha :-)

[@miklaswerst3148]

Thanks for the great informative and easy to understand lessen I wanna learn on this topic an this really is a good video for me (:

[@PhysicsMadeEasy]

Thank you Miklas, I am glad you enjoyed it (it was a lot of work!). I am currently writing the scripts for the future episodes, so if you want to see a specific point you'd like to see developed, feel free to suggest!

[@jackheltzel2804]

Sperm entering egg is EXPANSION Of sentience. I love the Stevie Nick's song, trouble in Shangri la. Lol

[@PhysicsMadeEasy]

haha, you should check The Egg - a short story on the Kurzgesagt channel... Your comment suggests you'll like it! Yeah, I know this song, it's pretty neat with catchy backvocals and refrain. Why did you mention it here?

[@chinmaytelang271]

2 questions: 1. At 0:48, when you say that the universe contained enormous amount of "energy", was it "pure" energy (if I may use that term), or was it stored in some particles kind of particle/s? As far as I my understanding goes, I've yet to see any form of energy that could exist without the existence of any particle at all (whether massless ones like photons, or ones containing mass like countless others). Could you please clear this doubt? 2. At 0:55, when you say energy condenses to form quarks, gluons, etc., what exactly does that mean? Again, my understanding is that mass, energy, etc are properties of particles. Even in the equation E = mc², matter doesn't get "converted" to energy, as such - rather, it gets converted into electromagnetic radiation, which is also in the form of particles (for example, an electron and a positron annihilating one another to give 2 photons). It is mass (rather than matter itself) that gets converted to energy. Please correct me if I'm wrong.

[@PhysicsMadeEasy]

Hi Chinmay Q1: According to quantum field theory (QFT), every field is associated with a particle. But this doesn’t mean that the particle is stable in all conditions! For example, electrons are stable in our conditions (the electron field), but not the tau which is much more massive. The more massive a particle the less it is stable usually. For a highly massive particle to be stable, the surrounding energy needs to be high. The problem we face in understanding this at the beginning of the universe, is that our physics is not yet describing correctly what happens to the fields at very high energy densities because quantum mechanics doesn’t describe well gravity, and general relativity at these energy densities concludes with infinite quantities. "I've yet to see any form of energy that could exist without the existence of any particle at all". You are experiencing it everyday: The Higgs field 😉 Q2: Consider a water solution containing a small amount of poorly soluble salt. All that salt is solubilized, so the water is transparent. Change the temperature, and the water becomes turbid because little grains of salt have precipitated. That is a good image for what is going on when one talks about particle condensation. For example, again, the Higgs field: Provide enough energy to raise the temperature immensely (like in the LHC, a collision of protons at very high velocity), and you get some Higgs particles that form (the kinetic energy of the proton has been converted into mass). As soon as these move away from the impact position, they decay into more stable particles.

[@chinmaytelang271]

@@PhysicsMadeEasy Thank you for your reply 😊 Still have a doubt though: When you mention the Higgs field, is that "energy" as such? Field and energy are not synonymous terms, right? Also, isn't the Higgs field caused by the Higgs boson?

[@PhysicsMadeEasy]

@@chinmaytelang271 No field is not energy. The energy of a field can be seen as a 'state' of the field.

[@chinmaytelang271]

@@PhysicsMadeEasy 😄👍🏻

[@chinmaytelang271]

@@PhysicsMadeEasy What causes the Higgs field? Isn't it the Higgs Boson? Or a broader question is what generates any field, for that matter?

[@unitedspacepirates9075]

BTW, dark energy is an illusion caused by the gravitational distortion caused by the gravitational fields of distant galaxies. Gravity from distant galaxies has a redshift effect on the frequency of light they emit in the same way that gravity can bend the path of light from a light source behind the gravitational field. The same spacial distortion bending light paths, also distorts the frequency of light emitted from super heavy distant galaxies. Hence no cosmic acceleration, no dark energy causing acceleration, no un-accounted for dark matter, and certainly, no big bang. This universe is eternal, without beginning or ending. Cosmic background microwaves are but distant galaxies who's light has been gravitationally distorted beyond your visible spectrum. Galaxies continually exchange and recycle energy and birth new stars out of old dead ones forever and ever. How do you think light escapes super heavy distant galaxies with its frequency visually unaffected by spacial distortions? Someday sapien's decendents will travel to distant galaxies and discover the return trip doesn't take require extra travel time as no acceleration is actually occuring... That is unless your craft is destroyed by war mongering violent species, leaving you marooned on their backwards hillbilly planet where its custumary to torture food species before consuming them.

[@mona-xf5mr]

Are you a physics major /researcher ?

[@unitedspacepirates9075]

@@mona-xf5mr evolutionary descendants

[@mona-xf5mr]

@@unitedspacepirates9075😂👌great answer.

[@gselectricaldoraha5712]

It could be negative energy and gravity could be a positive energy and hence net energy is zero😁

[@PhysicsMadeEasy]

The idea of negative mass generating a repulsive gravity has been suggested. But, up to now, no evidence whatsoever! In my humble opinion, Energy is a relative quantity (An energy state only exists compared to another energy state). Check this video if you curious about energy: kzbin.info/www/bejne/pZfSnn9npq5mrqs