Twin astronauts Scott and Mark Kelly were separated for almost a year, undergoing intensive measurements when one was in space and one was on Earth. But that was only the beginning of their scientific odyssey. "Beyond A Year in Space," PBS and Time's follow-up documentary to last year's — which followed Scott Kelly from launch to landing — chronicles Kelly's return to life on Earth and the extensive medical testing the duo undergo to determine exactly what changes have occurred as a result of his record-breaking stay on the International Space Station. The documentary also follows two new astronauts, Jessica Meir and Victor Glover, training to go even further.

A team of international scientists attempt to document the first-ever image of a black hole.

BBC Horizon Documentary. Jupiter, the largest and fastest rotating planet among the eight major plan...

Today, hundreds of kilometers above our heads, millions of pieces of trash are orbiting randomly at ...

Meet the teams of brilliant engineers and bold explorers behind NASA’s latest moon mission.

Discover the UFO phenomenon like never before, with insights from NASA, CNES, Oxford, compelling fir...

The 1960s was an extraordinary time for the United States. Unburdened by post-war reparations, Ameri...

What if you could get behind the wheel and race through space? We scale down the Solar System to the...

A feature-length documentary about the film Galaxy Quest and its legacy, celebrating its milestone 2...

An IMAX 3D camera chronicles the effort of 7 astronauts aboard the Space Shuttle Atlantis to repair ...

William Shatner presents a light-hearted look at how the "Star Trek" TV series have influenced and i...

This feature-length documentary is a portrait of eclipse chasers, people for whom solar eclipses - a...

In VAST, we set off on a journey further into space than any other human being has ever been. Join u...

In one single, epic camera move we journey from Earth's surface to the outermost reaches of the univ...

The first American space station Skylab is found in pieces scattered in Western Australia. Putting t...

Billions of years ago, Venus may have harbored life-giving habitats similar to those on the early Ea...

Horizon visits state-of-the-art laboratories and uses CGI to recreate the science-fiction-worthy wea...

In a studio setting, Stephen Hawking, Arthur C. Clarke and Carl Sagan (who joins them via satellite)...

An epic journey around Mars — built from real satellite and rover data — revealing the red planet as...

National Geographic and NASA are sending you into space - live! For the first time ever, board the I...

The New Horizons team examines the latest findings and imagery from Pluto and the fringes of our sol...