[And what a much-needed getaway it was. For all the work that needed to be done--all the problems that had to be fixed, Optimus needed a time to get away from it all. And for once, not having to leave to do so.]

I believe Scorpius is the one we are indirectly a part of. Named after a human animal known as the scorpion.

[A finger points up, to the tail end of it]

The tip there is the sun that our home orbits.