Is an Alien Spacecraft Hiding in the Kuiper Belt? | NASA's Unexplained Files

Stream Full Episodes of NASA’s Unexplained Files:

Subscribe to Science Channel:

Like us on Facebook:

Follow us on Twitter:

Follow us on Instagram:

Tags aliens, astronomy, Astrophysics, betelgeuse, black hole, earth, galaxy, hollow moon theory, milky way, nasa, nasa unexplained files, neutron stars, outer space, physics, Planets, science, science channel, science channel episodes, science channel videos, science documentaries, solar system, space, stars, supernova, the big bang, the sun, ufo, unexplained files, universe