Watch Carl Sagan pitch solar-powered spacecrafts to Johnny Carson — in 1976


Nearly 40 years after Carl Sagan appeared on The Tonight Show with a sail and a dream, the late astronomer's plans for a solar-powered spacecraft may soon be a reality.
Science Guy Bill Nye launched a Kickstarter campaign to help crowdfund his LightSail project on Tuesday. Less than two days later, Nye and his team at the Planetary Society had already passed their initial goal of $325,000, which they say will fund the spacecraft's building and initial testing. The LightSail, which Nye describes as the "people's spacecraft," would feature a tiny satellite, propelled along its starry journey by kite-like sails that rely on the sun's energy for fuel.
Sagan described some of the hypothetical uses for such a spacecraft nearly 30 years ago, to Johnny Carson, and you can watch the scientist discuss his dreams for his design starting at the 22-second mark in the video, below. —Sarah Eberspacher
The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Sarah Eberspacher is an associate editor at TheWeek.com. She has previously worked as a sports reporter at The Livingston County Daily Press & Argus and The Arizona Republic. She graduated from Northwestern University's Medill School of Journalism.
-
August 31 editorial cartoons
Cartoons Sunday’s political cartoons include FEMA's new scheme, Gavin Newsom's antics, and a clue in the Epstein files
-
Disarming Hezbollah: Lebanon's risky mission
Talking Point Iran-backed militia has brought 'nothing but war, division and misery', but rooting them out for good is a daunting and dangerous task
-
Woof! Britain's love affair with dogs
The Explainer The UK's canine population is booming. What does that mean for man's best friend?
-
SpaceX breaks Starship losing streak in 10th test
speed read The Starship rocket's test flight was largely successful, deploying eight dummy satellites during its hour in space
-
Rabbits with 'horns' sighted across Colorado
speed read These creatures are infected with the 'mostly harmless' Shope papilloma virus
-
Lithium shows promise in Alzheimer's study
Speed Read Potential new treatments could use small amounts of the common metal
-
Scientists discover cause of massive sea star die-off
Speed Read A bacteria related to cholera has been found responsible for the deaths of more than 5 billion sea stars
-
'Thriving' ecosystem found 30,000 feet undersea
Speed Read Researchers discovered communities of creatures living in frigid, pitch-black waters under high pressure
-
New York plans first nuclear plant in 36 years
Speed Read The plant, to be constructed somewhere in upstate New York, will produce enough energy to power a million homes
-
Dehorning rhinos sharply cuts poaching, study finds
Speed Read The painless procedure may be an effective way to reduce the widespread poaching of rhinoceroses
-
Breakthrough gene-editing treatment saves baby
speed read KJ Muldoon was healed from a rare genetic condition