And now, there are observers – plural. Ontario's Kevin Fetterof filmed the X-37B "gliding past the binary star Eta Serpentis," according to Space.com, which has – video of the flyby.

This story was updated at 5:31 p.m. ET. After an intense search, a crew of amateur satellite sleuths has spotted the U.S. Air Force's second X-37B space plane – a robotic spacecraft that ...