Harder Space Science
This is a Factorio: Space Age mod specifically to restore the original 2.0 prerelease space science tech tree.
In this initial version, the tech tree has been reverted. However due to my lack of modding ability, once you have unlocked the Silo, instead of launching research rockets you can simply craft 10 space science for the price of a rocket.
All of the changes included in this mod are based on pre-release playthroughs. It's as accurate as I could make it, even though that does mean there are some pretty questionable changes.