The Processes That Affect Galaxies Over Their Lifetime

The amount of gas a galaxy has is what you can use to predict, well, what's going to happen to a galaxy in the future. And so what are the processes that affect galaxies over their lifetime? Yes, i mean, it depends on whether a galaxy is left completely alone and isolated, or whether they're in a big group or cluster galaxies. But if you have an isolated galaxy, it's really in charge of its own destiny. O canto foot it like that, alright? It's completely isolated. What happens to that galaxy depends on what that galaxy does in aly. So where does it send its gas? Does it funnel it towards the middle, through spiral arms