So skybase has been updated. I don't have any screenshots, but it's under construction anyways and probably not finished. There are now doors (the same ones in gemini and aries) on both of the entrances and you have to destroy it with your weapon to get in. However because the jetpack boundaries are messed up you can just fly in or out if you're close enough to the wall.
Sadly, along with this update Thomas Island has been changed. There is no way to get to it other than a jetpack, and our beloved Thomas is nowhere to be found. He will be missed