Battle of the space stations… the two human-crewed outposts in low Earth orbit sync up over the next few days, as China’s Tiangong Space Station laps the International Space Station. Both are in ~92 minute orbits, and Tiangong is slightly lower and ~50 seconds faster. This all means that about once every two weeks, the two human outposts meet up, and it’s possible to see all 10 of the humans in space, at once. If you have a pass of either, check ‘em out… the U.S. eastern seaboard has a good pass of the pair coming right up early tomorrow morning at ~5:58 AM EDT: