The fourth episode of 'Cosmos: A Spacetime Odyssey' airs on Sunday, March 30 at 9 p.m. ET/PT on FOX and Monday, March 31 on National Geographic at 9 p.m. ET/PT.
In "A sky full of ghosts," host Neil deGrasse Tyson will explore how light, time and gravity affect our perception of the universe.
The episode synopsis reads, "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 in the year 1809. William Herschel, whose many discoveries include the insight that telescopes are time machines, tells bedtime stories to his son, who will grow up to make some rather profound discoveries of his own. A stranger lurks nearby. All three of them figure into the fun house reality of tricks that light plays with time and gravity."
You can watch the full episode of "A sky full of ghosts" online by clicking here.
The television event is a successor to Carl Sagan's Cosmos: A Personal Voyage and tells the story of how we discovered the laws of nature and found our coordinates in space and time.
The original series first premiered in September 1980 on PBS, and for 10 years was the most watched series ever on public television in America. Based on his book of the same name, and written for television by Sagan, Ann Druyan and Steven Soter, the series was a stunning and iconic exploration of the universe as revealed by science that took viewers through a galaxy of topics to help explain the universe and humanity's place in it.
The 13 part series of Cosmos will be broadcasted every Sunday on FOX at 9/8c, and Monday at 10/9c on National Geographic. You can also watch the live stream online at FOX Now and FOX on demand. A Cosmos App is also available for download on iPhone, iPad and Andriod.
If you miss the previous episodes, you can watch them by clicking here.