What If Dark Energy Doesn’t Exist?

Dark Energy is what we call the mysterious force that seems to be pushing the universe apart. By some calculations, it makes up 70% of everything in nature. Or...maybe it doesn’t exist at all! Plus, Juno’s observations give us new information about Jupiter’s magnificent magnetic light shows!

Hosted by: Hank Green

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[robinhahnsopran]

Lots of casually mindblowing science news recently.

[Designer-Alan]

"This is an attractive hypothesis..." On the other hand, some might consider it a repulsive hypothesis.
(I'll just let myself out.)

[inigop.d.]

2:39 "this is an attractive idea" when talking about a repulsive force made my brain hurt for a moment

[MattJasa]

The technology gets brighter, but the mysteries become darker.

[simontv]

I didn't realise hank was 40 until I watch his very really good episode and I just wanna say he looks like he's in his mid 20's

[OmateYayami]

Dark Cosmology Centre, institution with such a dank name should get recognition.

It's kinda shame only publishing journal got credited in the video and not the authors, like 1st page shot or something, so here's full credit:

Karoline Loeve, Kristine Simone Nielsen & Steen H. Hansen

Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Denmark

[gib]

Music for Scientist, the new Raid Shadow Legends of Youtube sponsorship

[kostasfoto]

When the time comes, one scientific team will receive the darkest Nobel prize ever.

[christosvoskresye]

I fell in to a burning ring of plasma;
I fell down, down, down and was studied by NASA.
And it burns, burns, burns,
The ring of plasma,
The ring on Jove.

[Master_Therion]

This would be great if we could find another explanation the Universe's expansion.
Personally, I think Dark Energy is repulsive.

[BuildingCenter]

4:32. Ah, yes. The magnetic field space arachnid, or orbital orb weaver, crafting aurorae for millennia.

[onometre]

damn they have been really relentlessly advertising that album

[Clane_K]

I could've sworn that Juno was already "sacrificed" to Jupiter's atmosphere

[MrYTGuy]

I came up with the same hypothesis (and several others) to explain universal expansion a few years ago. Nice to see one of them get some research done on it.

[phillipnunya]

I personally think this new explanation makes more sense than the idea that energy seeming comes from nowhere and thus requiring even more speculation to explain.

[VikingTeddy]

That's not debunking dark energy, that's just proposing what it might be.

I love the idea, the title is just odd.

[ChristieNel]

I thought we already explained dark matter and dark energy as the Flying Spaghetti Monster messing around. Ramen.

[Treviisolion]

That hypothesis about dark energy also seems pretty nice because I can imagine that we can pin down the properties of the hypothetical dark matter particles that would fit their criteria. As in since we already have a decent idea of how much dark matter is unaccounted for and presumed to be mostly a new type of particle, scientists can test different strengths of this proposed force dark matter would interact with, as well as proposed masses of the particles themselves, to narrow down the specifics to whatever would lead to dark matter being capable of clumping together and holding galaxies together while also having a repulsive force strong enough to cause the acceleration between galaxies we see, and due to the fact that we wouldn’t expect galaxies to accelerate from each other 100% consistently due to differences in dark matter concentrations, looking for those differences could be an independent source of verification even if the proposed particles end up being too massive for us to realistically create.

As such even if this theory turns out to be dead wrong, I expect that it will provoke a lot of discoveries that will help narrow down the properties of dark energy, and considering how much of this theory seems testable compared to some other dark energy theories we might be able to get an answer within years instead of decades, though that might be a bit optimistic.

Exciting stuff!

[Groaker]

Anything beginning with "Dark" is going to be cool and mysterious but, holy hell universe, you went whole hog on this one!

[brucecoppola]

While vacuuming the carpets and dusting the floors I had an aha! moment and now know what dark matter is made of! It should have been obvious all along!

Cat hair.