Welcome, Clarky If you read around on the forums, you'll see that nearly everyone has a different concept of what a DC is. Only you can really make that decision for yourself, and the best way is to just read around and decide what you believe, and what you believe is BS. I personally don't think DCs are anything but a figment of your imagination, and as to the purpose of dreaming... we will probably never know! But it's fun to have your own conceptions, I am eagerly waiting for some more scientific evidence!

I've never flown to space, but I've never read a similar account like that on here. You seem relatively advanced with LDing, so you may want to ask in the General Lucid Discussion area, you might get some more relevant advice than here in the noob section since you are so far ahead of the majority of the newbies.