Last Watched

"Fritz Zwicky"  Sort by

Unafraid of the Dark

   2014    Science
Tyson describes the discovery of cosmic rays by Victor Hess through high-altitude balloon trips. Swiss Astronomer Fritz Zwicky, in studying supernovae, postulated that these cosmic rays originated from these events instead of electromagnetic radiation. Also tells how Vera Rubin observed that the rotation of stars at the edges of observable galaxies did not follow expected rotational behavior leading to consider the existence of dark matter. This further led to the discovery of dark energy to account for the increasing rate of expansion of the universe. Tyson then describes the interstellar travel of the two Voyager probes. Tyson tells the Carl Sagan's role in the Voyager program, including creating the Voyager Golden Record to encapsulate humanity and Earth's position in the universe. Tyson concludes the series by emphasizing Sagan's message on the human condition in the vastness of the cosmos, and to encourage viewers to continue to explore and discover what else the universe has to offer.
Series: Cosmos: A Spacetime Odyssey
Galapagos with David Attenborough
Galapagos with David Attenborough

   2013    Nature
Cosmos: A Spacetime Odyssey
Cosmos: A Spacetime Odyssey

   2014    Science
Reel Rock
Reel Rock

   2014    Culture
Jonestown: Terror in the Jungle
Jonestown: Terror in the Jungle

   2018    History
Conversations with Dolphins
Conversations with Dolphins

   2016    Science
Generation Iron
Generation Iron

   2017    Culture
Rise of Empires: Ottoman
Rise of Empires: Ottoman

   2020    History
Generation Iron
Generation Iron

   2018    Culture