Nearly 34 years after it originally aired on television, the National Geographic Channel will rebroadcast all 13 episodes of Carl Sagan’s series “Cosmos: A Personal Voyage” as a two-day event this weekend, Saturday, March 8, from 12 p.m. to 6 p.m., and Sunday, March 9, from 12 p.m. to 7 p.m.

The two-day marathon will conclude in time for the global world premiere of the new series Cosmos: A Spacetime Odyssey on Sunday, March 9, from 9 p.m. to 10 p.m. ET/PT across multiple U.S. Fox networks, including Fox Broadcasting Company (FOX), National Geographic Channel, Nat Geo WILD, Nat Geo MUNDO, FX, FXX, FXM, FOX Sports 1, FOX Sports 2 and FOX Life.

After the cross-network premiere event, Cosmos: A Spacetime Odyssey will continue its epic 13-episode run, airing Sundays from 9 p.m. to 10 p.m. ET/PT on FOX and Mondays — with all-new bonus footage and behind-the-scenes content — on the National Geographic Channel from 10 p.m. to 11 p.m. ET/PT.

The original series “Cosmos: A Personal Voyage” first premiered in September 1980 on PBS. Based on his book of the same name, and written for television by Sagan, Ann Druyan and Steven Soter, the series was an 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.

Among the areas explored are the life cycle of stars, genetics, laws of planetary motion, the journey to Mars, the search for intelligent life beyond Earth and the big bang theory.

More than three decades after the debut of “Cosmos: A Personal Voyage,” Seth MacFarlane has teamed with Sagan’s original creative collaborators Druyan and Soter to conceive the 13-part series that will serve as a successor to the Emmy and Peabody Award-winning original series.

Cosmos: A Spacetime Odyssey is produced by Cosmos Studios, the Ithaca, N.Y.-based company Ann Druyan co-founded in 2000, and Fuzzy Door Productions, MacFarlane’s company.

Photo courtesy: Cosmos