I've been looking for this book I read as a teenager and can't find any reference to it. It was written probably late 70's to early 80's.
A mission to the first planet around another star is formed with a crew of four married couples. After the craft is underway it's discovered that the scientist who headed the mission had lied about the planet and it didn't actually exist. His purpose was to isolate the crew in space so they would evolve beyond being normal humans.
The crew ended up playing around with the configuration of the ship to improve it. They also began dabbling in the iChing and TM meditation, it's a very psychedelic themed story. One of the crew dies while modifying the engines and becomes a disembodied consciousness that is referred to as "Uncle Ghost" by the children who were born on the journey.
They eventually arrive at the planetless star and another crew member enters a deep trance and finally floats out of an airlock and a new planet forms around her.
They all eventually travel back to Earth but I don't remember how the story ends. It was so much fun to read and I would love to find it again.