This astronaut leaves Earth's solar system,something happens to his ship,instead of dying he is put in a state of suspended animation for a few hundred years. He is found by a ship they slowly revive him they are earth colonist I think from Alpha-Centauri .He goes back with them and gets involved in a plot to overthrow earth,s rule over them.On way back to the Sol System he finds out his buddy is a traitor,but they still finish the mission, afterwards they are captured and sent to prison on Venus. That's as far as I got in the book. The book was lost in a Apt. fire. I would really appreciate finding a copy of this book so I can finish it..