This reminds me of a sci-fi book I read when I was a kid called Rocheworld by Robert Forward. They were going to the Barnard Star, but it had binary planets wh

This reminds me of a sci-fi book I read when I was a kid called Rocheworld by Robert Forward. They were going to the Barnard Star, but it had binary planets where one was all water. Good book (if I recall)..