Watch
Season 1, episode 4. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.
Currently watching
A Sky Full of Ghosts
An exploration of how light, time and gravity combine to distort our perceptions of the universe. We eavesdrop on a series of walks along a beach on summer nights in the year 1809. William Herschel, whose many discoveries include the insight that telescopes are time machines, tells bedtime stories to his young son, John, who will grow up to make some rather profound discoveries of his own.
Watch state
Watch history and continue watching stay tied to your active profile, so you can pick up later from browse, account, and detail pages.
Provider validated
Cast And Share
These providers run inside an external iframe, so the most reliable casting flow is to open the player in its own tab and use your browser or device cast controls there.
Episode 1: Standing Up in the Milky Way
Episode 2: Some of the Things that Molecules Do
Episode 3: When Knowledge Conquered Fear
Episode 4: A Sky Full of Ghosts
Now playing
Episode 5: Hiding in the Light
Episode 6: Deeper, Deeper, Deeper Still
Episode 7: The Clean Room
Episode 8: Sisters of the Sun
Episode 9: The Lost Worlds of Planet Earth
Episode 10: The Electric Boy
Episode 11: The Immortals