Space is so big that you could fit everything else inside it and still have room to spare. I know that because a Neil DeGrasse Tycoon image (edit: an upcoming management sim) that I found on an internet forum told me that it was so. Who needs research grants? Look at this, for instance. You wouldn't learn that in a lab. I'm not sure if X Rebirth will simulate such wonders but it does have a lot of space to explore and the video below shows how long range scanners will help players to discover the exciting parts.
It's been so long since I played an X game that I can't remember which one it was. I do remember that it gave me no reason to feel as excited about Rebirth as I'm becoming. It's looking damn fine.