If you like hard sci-fi, his NASA series is excellent, especially Voyage and Titan. They describe expeditions to Mars and Titan using Apollo era technology, in such a believable fashion that you think it could have really happened.

Love me some Stephen Baxter. Vacuum Diagrams is a great anthology of stories in this universe.

I haven't read anything by him, where is a good place to start? Here?

Premise reminds me of The Integral Trees a lot

I loved Evolution by Baxter. One of my top ten books, I’ve read it dozens of times.