Galaxies not in orbit?

[gabriel.dac]

In the simulations that involve galaxies, why aren't they in orbit? As far as I know the magellanic clouds are orbiting the milky way but in the simulation all galaxies are heading towards the milky way (or Andromeda)

[gabriel.dac]

Thank you all

[gabriel.dac]

I already said thank you, no need for so many more replies!

[gabriel.dac]

Ok seriously guys, my question isn't that hard

[Darvince]

Because dan set it that way??? I dunno.

[gabriel.dac]

k.

Where is dan

[phinehas]

<censored>

[starbase1]

In general galaxies in a group do not orbit each other in a tidy way like moons.

Relative movement is also very slow indeed - consider that Andromeda will reach us in about 4 billion years - to go around us in one orbit is over 6 times as far, so say getting on for 30 billion years, which is twice the current age of the universe, and then some. By which time most of the stars will have gone out!

Obviously things like the magellanic clouds are much closer, but even  so it is wrong to think of them as looping around us.

But I guess there is nothing to stop you setting something up and giving them a nudge...

[Dan Dixon]

In the simulations that involve galaxies, why aren't they in orbit?

There's not actually good data on how fast and in what direction most galaxies are moving... in short, in the simulation, all galaxies currently start out as not moving.

Find some information about the velocities of galaxies and we'll update the sim.