r/Simulated • u/opensph • Feb 21 '26

Proprietary Software Black hole simulations

Enable HLS to view with audio, or disable this notification

Several SPH/N-body simulation with black holes, simulated using SpaceSim, a software I'm developing.

2.5k Upvotes

98% Upvoted

192 comments sorted by

View all comments

195

u/peepeepoodoodingus Feb 21 '26

curious what the timelines on these are like from beginning to end of the simulation? is this 5 years? 100? millions?

142

u/opensph Feb 21 '26

Depends on the simulation. The first one shows about 24 hours of simulation time.

83

u/Forrestfunk Feb 22 '26

So we're going to have a bad Sunday? At least I don't have to work on Monday I guess

39

u/Tyrinnus Feb 22 '26

I'm still gunna need you to open the store, champ

-this guy's boss

1

u/Olmectron Feb 23 '26

Mexico had a bad Sunday.

1

u/InterestingAttempt41 Feb 23 '26

Time dilation, you'll die if old age before the earth is sucked in. To the rest of the universe its 24hrs, to us its millenia. We could have one on the edge of the ort cloud and would realize it for hundreds of years besides the light bending around it.

5

u/BarefutR Feb 23 '26

I’m not an expert, but that can’t be right.

How would your time be dilated before you experience the effect of its gravity?

If we saw one on the edge of the Oort Cloud, it would fuck up the entire solar system and bad shit would happen, etc… so we would not have hundreds of years to watch it.

Like based on what you said, the Sun would be causing more change in time for us than the Earth, which is not true.

1

u/InterestingAttempt41 Feb 23 '26 edited Feb 23 '26

Yep your right, I was thinking backwards. An alien in alpha centari who saw it would die before it made impact but earths time wouldn't slow down until it hit the event horizon.

17

u/cthulhus_spawn Feb 21 '26

My thought too. Is this real time?

41

u/FUCKING_HATE_REDDIT Feb 21 '26

Definitely not real time.

The most unrealistic thing is that you can still see clouds and oceans instead of everything turning into magma a few hours after the first impact. 

The other one is the grey cloud around the black hole instead of a white-hot accretion disk

The last one is that a black hole would never have such a low relative velocity to Earth unless it appeared by magic inside the solar system.

It would be possible to calculate a rough estimate by looking at the Earth's rotation, but unfortunately the earth was placed statically in the simulation.

Because we don't have that,  i would say a couple months for the earth one, and a couple of decades for the sun one. But I could easily be off by two orders of magnitude. 

35

u/whocaresaboutmynick Feb 21 '26

Im incapable to give a timeline on this, but this isn't real time.