Sagan’s original Cosmos series was seen in at least 60 countries.
Cosmos: A Personal Voyage was a 13-part science documentary that first aired on PBS in 1980. Carl Sagan presented and co-wrote the series with Ann Druyan and Steven Soter. Its ambition was unusually broad: it connected astronomy and cosmology with the history of science, the origin of life, and humanity’s place in the universe.
The program became an international television phenomenon. It reached more than 500 million viewers across at least 60 countries and remained the most widely watched series in American public-television history until The Civil War premiered in 1990. The wording “at least” matters: 60 is the minimum figure reported in the standard account, not necessarily a final count of every territory or later broadcast.
A common mix-up is confusing Sagan’s 1980 original with later Cosmos productions. Neil deGrasse Tyson hosted Cosmos: A Spacetime Odyssey in 2014, while Sagan hosted the original series.