I have all of the prerequisites researched but it won't let me research space science. Any suggestions?

I'd need more information than that to figure out why... it's probably a bad interaction with somebody elses mods.

I disabled all mods except yours and it still wouldn't let me research it

Is it actually selectable as a technology?
does it not allow you to start the research, or can you but it just doesn't do anything?
what are the prerequisites?
are they all researched?
which mods of mine do you have installed?
what settings have you changed, especially those in bobrevamp?

Like I said, I need more information before I can figure anything out, I can usually determine the answer to half of those questions just from a screenshot.

Also, just because you've removed other mods doesn't mean the problem fixes itself, though in theory it should if you have bobplates (Metals chemicals and intermediates) installed.

I updated the mods and the issue is fixed.