Bill Nye & Planetary Society Declare LightSail™ Test Mission Success

Citizen-funded spacecraft deploys solar sail, milestone step toward 2016 mission

Press Statement
June 10, 2015

Erin Greeson
Phone: +1-626-793-5100

To listen today's press briefing, visit the LightSail Mission Control Center »

Pasadena, CA (June 10, 2015) -- The Planetary Society, the world’s largest non-profit space interest group, today declared the LightSail test mission a success. After 19 days in orbit, the CubeSat spacecraft deployed its Mylar® solar sails in space. This marked a milestone for the mission to test LightSail’s critical functions in low-Earth orbit, a precursor to a second mission set for 2016.  

Bill Nye (The Science Guy®), CEO at The Planetary Society, celebrated the landmark and stated:

“I’m very proud to say that our LightSail test mission was a success. We saw again that space is hard. It’s a test flight, and sure enough our little spacecraft tested us. I’ve got to congratulate our remarkable team. They solved some unexpected big problems up there with nothing but short radio signals sent from down here. This LightSail test taught us a lot, just as we hoped it would, and so we’re ready to do some real solar sailing with LightSail’s 2016 mission. Let me finish by reminding everyone that this mission and next year’s flight are funded entirely by our supporters and especially our members— people of Earth, who want to participate in space exploration. We’re changing the way humankind explores space. Today is a big day for The Society and for space explorers everywhere.”

A photograph taken by the spacecraft confirmed sail deployment. The photograph and an initial announcement were posted by Jason Davis, digital editor at The Planetary Society and embedded LightSail mission reporter. 

“This week's flight was an ideal test in preparation for our primary mission in 2016. We were able to validate the function of all key spacecraft systems including solar sail deployment, and along the way the team was forced to deal with a number of anomalies and setbacks,” said Doug Stetson, LightSail project manager and founder and principal partner of the Space Science and Exploration Consulting Group. “We've learned a tremendous amount about our spacecraft and operations plan, and we're already preparing for what should be a spectacular flight late next year.”

David Spencer, professor of the practice at the School of Aerospace Engineering and director for the Center for Space Systems added, “This ambitious mission has been a challenge every step of the way. Throughout development and operations, our team has worked through problems, found solutions, and ultimately succeeded.”

The LightSail test spacecraft launched into orbit aboard a United Launch Alliance (ULA) Atlas V rocket from Cape Canaveral Air Force Station on May 20, 2015. The spacecraft was part of a secondary payload dubbed ULTRASat aboard the U.S. Air Force mission AFSPC-5. 

Solar sailing works by using sunlight for propulsion. When solar photons strike LightSail's reflective Mylar® sails, their momentum is transferred to the spacecraft, gradually accelerating it through space. While the push from photons is miniscule, it is continuous and unlimited. Solar sails can eventually reach greater speeds than those obtained from chemical rockets. LightSail is packaged into a small spacecraft called a CubeSat. CubeSats have made low-cost space missions a reality for universities and research groups. 

The spacecraft was originally designed and built by Stellar Exploration Inc. in San Luis Obispo, California. Important flight system modifications, software, and integration and testing were provided by Pasadena California-based Ecliptic Enterprises Corporation (Ecliptic), a space avionics and sensor systems firm best known for its popular RocketCam family of video systems used on rockets and spacecraft. Boreal Space of Mountain View, California, serves as a subcontractor to Ecliptic. Mission analysis, mission operations, and ground systems were provided by the Georgia Institute of Technology and by California Polytechnic State University, San Luis Obispo, California. The LightSail program is managed for The Planetary Society by Doug Stetson, president of the Space Science and Exploration Consulting Group of Pasadena, California.

“LightSail’s test mission success is an important stepping stone toward a new class of CubeSats employing solar sailing for propulsion, said Rex Ridenoure, CEO of Ecliptic. “We’re embarking on a new era for solar system exploration using very small satellites.”

The Planetary Society’s second LightSail spacecraft is scheduled to fly in 2016. This mission will build on the results of the test flight to conduct a full demonstration of solar sailing in Earth orbit. LightSail will be packaged inside a spacecraft called Prox-1 built by students at Georgia Tech. The spacecraft duo will be launched aboard a SpaceX Falcon Heavy rocket to an orbit of about 720 kilometers (450 miles), and for about two weeks LightSail will serve as a rendezvous target for Prox-1 before LightSail conducts its primary mission.

The Planetary Society's solar sailing involvement was started by Society co-founder Louis Friedman more than a decade ago. Co-founder Carl Sagan championed solar sailing on a famous 1976 episode of The Tonight Show with Johnny Carson.*  

"This test mission has been a high-intensity, high-profile dress rehearsal," said Jennifer Vaughn, chief operating officer for The Planetary Society. "Through the ups and downs of our LightSail test flight, our members, backers, and supporters around the world have cheered us on. LightSail is a tangible symbol of citizen participation in space exploration. Behind the simple beauty of an image of a shiny sail in space lit by the Sun is the collective effort of tens of thousands of enthusiasts who got this project built, launched, and tested. The successful test flight belongs to all of us."

For complete coverage of the LightSail test flight, as well as the second LightSail mission scheduled for 2016, visit

Citizens around the world can be part of the 2016 LightSail mission. The “Selfies to Space” feature invites people to submit photographs for inclusion aboard the spacecraft:

Dr. Neil deGrasse Tyson, a member of The Planetary Society board of directors, joined Nye to launch a LightSail Kickstarter campaign in a video announcement, which led to immediate worldwide response: Funded entirely by private citizens, LightSail is the yield of collective support:

For in-depth coverage of LightSail’s test and 2016 missions, follow embedded reporter, Jason Davis at

Related Recent News

Blog post (May 26, 2015): Software Glitch Pauses LightSail Test Mission

Press release (May 20, 2015): Bill Nye & Planetary Society Celebrate LightSail™ Spacecraft Test Launch; Citizen-funded solar sail CubeSat in orbit, awaits sail deployment stage

Media Resources 

Visit the LightSail Press Kit for resources available for media usage, including: videos, photography, biographies and press releases.


Then & Now: Carl Sagan on The Tonight Show with Johnny Carson

LightSail Mission Trailer

LightSail Mission (Full Version)

Bill Nye & Dr. Neil deGrasse Tyson launch Kickstarter

More Information

LightSail Fact Sheet (PDF)

About The Planetary Society

With a global community of more than 2 million space enthusiasts, The Planetary Society is the world’s largest and most influential space advocacy organization. Founded in 1980 by Carl Sagan, Bruce Murray, and Louis Friedman and today led by CEO Bill Nye, we empower the public to take a meaningful role in advancing space exploration through advocacy, education outreach, scientific innovation, and global collaboration. Together with our members and supporters, we’re on a mission to explore worlds, find life off Earth, and protect our planet from dangerous asteroids. To learn more, visit