Arepo simulation of galaxy formation

This computer animation, created using new software called Arepo, simulates 9 billion years of cosmic history. Arepo can accurately follow the birth and evolution of thousands of galaxies over billions of years. Arepo generates the full variety of galaxies seen locally, including majestic spirals like the Milky Way and Andromeda.
Credit: CfA/UCSD/HITS/M. Vogelsberger (CfA) & V. Springel (HITS)

• Category

  Science & Technology

[DarkNemesis25]

I shudder to think of the computing power of a species that's millions of years more advanced then us. They could vary well compute the universe quark by quark, atom by atom on the scale of the known universe for scientific understanding and learning... who knows.. we might be living in that simulation.. There would be zero way to tell..

[jeremy123422]

Well that sucked why didnt it start at 0 instead of 4 billion..?

[Blushot69]

For a ton of reasons, but basically it's inefficient and unhelpful. You wouldn't start at 0 because the Universe is very different initially and there's lots that's not understood; you'd have to have more physics in the simulation. It's also a study of galaxy formation, where you can't really define a galaxy 'til about this time, so anything earlier wouldn't be particularly meaningful for this study. These simulations also takes ages to run on supercomputers, so you need to optimize your time

[poioquentinho]

I wonder...how many variables does this animation contain. I mean how many can be influenced by each other?!

This perception of billions of year passing its remarkable and clear...though i´m just a curious in this subject!

Real potential in here...Thanks for this!

[CACBCCCU]

My relying on EM to do all the work of gravity may have been a mistake, but that doesn't imply there's anything wrong with the notion of gravity being mediated by spin-1 gravitons giving a spin-2 effect when retroreflection dominates. I'd rather suppose gravity's pull arises from graviton-quark couplings. Idk, maybe quarks and gravitons both have dual aspects involving positive and negative energy, and with quarks it has to do with being a fermion where both aspects exist simultaneously.

[John Stilley]

That is just beautiful guys.  Beautiful.

[CACBCCCU]

"black holes couple tightly but distinctly and are pushed together essentially by attractions between their accretions"

I should add "also by the attraction between each black hole and the accretion of the other." An external pull on a black hole's accretion disk would exert an indirect pull on the black hole. The point is a pair of black holes can be very tight without needing to be spinning around each other at anywhere near the rate GR requires, they can go slow enough to generate a spiral.

[CACBCCCU]

These concepts I've given highlight the need to treat black holes and their boundaries much differently than classical general relativity demands. It allows the possibility that black holes couple tightly but distinctly and are pushed together essentially by attractions between their accretions. Ads/CFT taken holographic can imply that quark-gluon systems resemble black hole complexes, the right gravity model shows exactly how it works, and why one or two black-hole pairs can generate a spiral.

[CACBCCCU]

I suppose gravity is weakly anti-entropic (condensing) to distributions of dispersed matter, more specifically that oppositely-directed photons provide the bulk of any gravitational pull between particles, hence the quantum gravity model I use universally is based on allowing largely-retroreflected (like a Newton's 3rd tendency for quantum gravity matter-action) graviton transfer flows to bias matter particles toward condensing-effect-oriented photonic transfer flows.

[Trevor Wozny]

What he said

[sleepingeye]

I would guess that if you wanted to simulate every part of the universe, you would need to have a computer that is built of at least as many parts as there are parts in the universe. :)

[pcuimac]

If those stupid commentators could only appreciate all the hard work that has gone into this simulation. But what do they ask: "Where is the Big Bang?" (Hurray. You can still not explain everything, so we need god.)

Yes, we cannot simulate the big bang, yet. But we will develop theories that can.