20 colliding Moons (SPH simulation)

Twenty identical Moons, initially at rest, are attracted by their mutual gravity, collide and merge together. Each Moon contains 100k particles.
Inspired by the 'Collapsing Moons' simulation from the Universe Sandbox.
Computed with OpenSPH
pavelsevecek.g...
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[@joshbishop]

Part of me keeps thinking "Naw, that's too liquidy, doesn't look real" and then I think about it some more, and think "holy crap that's what it'd do, isn't it? Wouldn't want to be one of those." Awesome sim!

[@DiveTheseClips]

Yeah everything is a liquid on a large enough scale

[@kinoko384]

Yup. Things get much softer and liquidy as scales go up. This is because the forces pulling apart the molecules get much stronger in larger scales, and break apart objects much more easily.

[@aircraftsupport5800]

@@kinoko384 Oh, I thought it's just about the high temperature.

[@voidomega4211]

@@aircraftsupport5800 probably both

[@aircraftsupport5800]

@@voidomega4211 Yeah, since high temperature causes melting

[@maswinkels]

Please let the simulations run longer. I can’t stop watching.

[@HarpSeal]

realistic universe sandbox

[@users4007]

I imagine universe sandbox and spaceengine will be like this in 10 or 20 years when computers are powerful enough

[@shebahammy]

@@users4007 why spaceengine

[@users4007]

@@shebahammy planet collision is on the todo list for spaceengine, currently it is not possible due to computer limitations, but since the engine is completely built from scratch the devs may be able to figure out a way to add a more simple version in the future when computers are more powerful

[@shebahammy]

@@users4007 oh

[@GodzillaJawz]

@@users4007 so nbody and planet collision?

[@Quartzplays309]

Surprised it made a moon with a stable orbit! ( you can see a glimpse of it at around 0:43 )Great sim!

[@AlexMoreno-zj7po]

That's definitely not a stable orbit

[@Quartzplays309]

@@AlexMoreno-zj7ponot really stable but stable enough to orbit the object created

[@DeltaHydrixian]

Can we just talk about… *PANCAKE MOON*

[@WinterNox]

Best Coca-Cola ad ever made.

[@creepercraftytT99]

"Congratulations!, Your 20 moons evolved into A Planet!" (Pokémon reference)

[@petterlarsson7257]

0:41 anyone gonna talk about the fact that the collisions formed a smaller and more oblate moon that has its original texture

[@shebahammy]

nice

[@petterlarsson7257]

@@shebahammy sigma

[@shebahammy]

@@petterlarsson7257 I’m Sheb btw

[@DCvsDJ]

Rare footage of planetesimals colliding

[@Nathan_STELLARIA]

I don’t remember seeing flying donuts! 0:13

[@melkiy582]

Why did this happen?

[@kedrednael]

Because it's awesome

[@HarpSeal]

because of gravity

[@galex2000]

Because God is sleeping.

[@KingdomOfSaulo]

Because why not

[@DavidOFCTM]

Because I Exist

[@RobertSilliams]

It formed a new rocky planet

[@grantwells4491]

With a small moon at the end!

[@eigentensor]

Rest in peace Mr video codec :D Great video as always!

[@robinpage2730]

Universe Sandbox with fluid dynamics

[@Vintincan]

I wish that these had volume

[@gingerXD872]

Suggestion: making Pluto colide with Eris, Haumea and Makemake

[@ryl1ee0]

When all the moon collided, it looks like a coffee

[@holymackerel7704]

this will be universe sandbox in 2018

[@immagical7036]

The way they all end up as liquid tho

[@Err0rcube_2]

Bro got a moon before he turned into a planet

[@Ersteller]

Great content! I love that stuff and also tried out your software openSPH but my results are not as stunning. Is there a chance of you releasing some tutorial on how to use openSPH. Rendering and workflow in general.

[@petterlarsson7257]

The tutorial is in the website

[@Ersteller]

@@petterlarsson7257 I was thinking more f a video tutorial

[@EnglishLad]

I'd be intrigued to know how quickly after coalescing that those newly combined moons would cool down to a stable temperature. I mean the merging of all those moons would produce a LOT of energy, so I imagine shortly after merging, the surface temperature of the newly formed body would be very high and would take an extremely long time to cool down.

[@_thisnameistaken]

So I did a lot of math and to cool from what I estimate to be 5000 kelvin to 1000k, it would take 571 years. To cool from 5000k to 310k (room temperature), it would take 21344.9 years. To cool from 5000k to cosmic microwave background temperature, it would take 29.85 billion years.

[@itz_nocilpergd3410]

Moons:help

[@TripleARawn]

and that's how babies are made

[@Yeetely_deet]

It looks like a Coca Cola advertisement at the end

[@GERALD_786]

Forbidden pooopoo liquid

[@cg.man_aka_kevin]

It's like 0 gravity of coffee. Not like fire and rocks. 😂😂😂🤣🤣🤣

[@BunyieUkpaka]

This looks like anime water attack

[@CapitainOne]

Just build a bunker, they said ....

[@petterlarsson7257]

why did you make it 720p

[@simpidutta4057]

how to destroy many moons/make many moons one single planet:

[@HARBINGER8752]

radiohead moment

[@user-jr2un3pl1v]

Parang

[@45hr52]

Pancakes of Doom

[@michahermann7869]

Can you please render these in VR? VR 180 (ideally stereoscopic) would be okay, VR 360 and a flight through this mess would be amazing. Really interesting to see that symmetrical water drop-like flashback effect. I guess that only happens when the objects collide dead-on and if the collision speed is not too high and not too low.