NASA's Unexplained Files Season 3 Episode 4 - Ghosts on a Comet

Airdate: 2015-Apr-29

Episode summary:

An astronaut on a spacewalk begins to drown. How could this terrifying event happen? Have NASA scientists discovered an asteroid that's been converted into a spacecraft? What are the strange objects spotted when NASA sends a top-secret payload into space?

About NASA's Unexplained Files series:

On NASA’s Unexplained Files, strange flying objects have been caught on NASA’s cameras and astronauts have reported seeing UFOs. Some o...Show more >