Channel: Science Channel
Category: Entertainment
Tags: science channelscience documentariesspaceunexplained filesbetelgeusesupernovaplanetsphysicsscience channel episodesouter spacegalaxyblack holemilky waythe big bangneutron starssolar systemaliensastrophysicsstarsastronomynasa unexplained filesnasascienceuniversethe sunearthscience channel videosufo
Description: China's first astronaut gets a haunting experience as he hears an eerie knocking on the outside of his spaceship's door. There are no faults with his craft, so is he imagining it, or is there someone, or something, on the outside knocking to get in? Stream Full Episodes of NASA's Unexplained Files: discoveryplus.com/show/nasas-unexplained-files Subscribe to Science Channel: bit.ly/SubscribeScience Like us on Facebook: facebook.com/ScienceChannel Follow us on Twitter: twitter.com/ScienceChannel Follow us on Instagram: instagram.com/ScienceChannel