Student Spaceflight Experiments Program Heritage

Last update of this page: February 3, 2020, 12:08 am ET, to include SSEP Mission 15 to ISS


Night launch of SpaceX-5, January 10, 2015, from Cape Canaveral Air Force Station, FL, adjoining Kennedy Space Center. Aboard the Dragon spacecraft is the SSEP Mission 6 to ISS Yankee Clipper II payload of 17 experiments. Yankee Clipper II payload operations were conducted on the International Space Station for nearly a month before Dragon de-orbit and splashdown in the Pacific off the California coast on February 10, 2015. These experiments were originally lost with the destruction of the Orbital Sciences 3 rocket on October 28, 2014. You can read about the emotional loss of the original Yankee Clipper I experiments and how the student flight teams stepped to the plate and worked to reconstitute the experiments for re-flight. The mantra at SSEP – real spaceflight all the time.  


Though the Student Spaceflight Experiments Program (SSEP) is a relatively new STEM education initiative—launched in June 2010—it already has an extensive heritage delivering real on-orbit research experiences for students in grades 5-16.

Since program inception in June 2010, there have been sixteen SSEP flight opportunities—SSEP on STS-134 and STS-135, which were the final flights of Space Shuttles Endeavour and Atlantis; and SSEP Missions 1 through 14 to ISS. A total of 191 communities have participated in the program, reflecting 42 States and the District of Columbia in the U. S., 5 Provinces in Canada, and a community in Brazil. Thus far 58 communities have participated in multiple flight opportunities, reflecting the sustainable nature of the program. For example, with Mission 14, there are 6 communities conducting their 2rd flight, 11 communities conducting their 3rd through 6th flights, and even 2 communities conducting their 7th flight.

Through the first sixteen flight opportunities (through Mission 14), a total of 126,600 grade 5-16 students across 2,496 schools were fully immersed in microgravity experiment design and proposal writing, 25,518 flight experiment proposals were received from student teams, and 314 experiments were selected for flight. A total of 281 experiments have flown through SSEP Mission 13. Another 33 experiments are expected to launch in Summer 2020 as the Mission 14 Apollo payload of experiments on SpaceX-21, launching from Kennedy Space Center, FL. Through Mission 13, 147,400 students across the entire grade preK-16 pipeline were engaged in their communities’ broader STEAM experience, submitting 120,670 Mission Patch designs.

Summary of Flight Opportunities to Date

Flight opportunities to date are summarized below. For a detailed list of critical milestones for each flight opportunity, visit the SSEP Flight Opportunities to Date page, and open the toggle labeled ” Click Here to See Summaries of SSEP Missions Critical Milestones”. 

Final Flight of Shuttle Endeavour (STS-134)
launched May 16, 2011, carrying 16 SSEP Experiments (SSEP1 Eagle payload)

Final Flight of Shuttle Atlantis, and of the U.S. Space Shuttle Program (STS-135)
launched July 8, 2011, carrying 11 SSEP experiments (SSEP2 Intrepid payload)

SSEP Mission 1 to the International Space Station
launched May 22, 2012, aboard SpaceX Dragon demonstration flight (COTS 2+) – the first commercial vehicle to berth with ISS, with 15 SSEP Mission 1 experiments (SSEP3 Aquarius payload)

SSEP Mission 2 to the International Space Station
launched October 7, 2012, aboard SpaceX-1 – the first operational flight of the Dragon spacecraft, with 11 SSEP Mission 2 experiments (SSEP4 Antares payload); and 12 SSEP
Mission 1 re-flight experiments (SSEP3b Aquarius II payload)

SSEP Mission 3 to the International Space Station
Mission 3a: launched September 18, 2013, aboard Orbital Sciences Demonstration 1 (Orb-D1), the first time the Cygnus spacecraft berthed with ISS, with 5 (of 17) SSEP Mission 3 experiments; 1 SSEP Mission 1 re-flight experiment; and 1 SSEP Mission 2 re-flight experiment (in toto the SSEP5a Falcon I payload)

Mission 3b: launched January 9, 2014, aboard Orb-1, the first operational flight of the Cygnus spacecraft, with 12 (of 17) SSEP Mission 3 experiments; (SSEP5b Falcon II payload)

SSEP Mission 4 to the International Space Station
launched January 9, 2014, aboard Orb-1, the first operational flight of the Cygnus spacecraft, with 11 SSEP Mission 4 experiments (SSEP6 Orion payload)

SSEP Mission 5 to the International Space Station
launched July 13, 2014, aboard Orb-2, with 15 SSEP Mission 5 experiments (SSEP7 Charlie Brown payload)

SSEP Mission 6 to the International Space Station
launched October 28, 2014, aboard Orb-3, with 18 SSEP Mission 6 experiments (SSEP8 Yankee Clipper payload); payload lost on launch failure and subsequent detonation of rocket; 17 of 18 experiments reconstituted as Yankee Clipper II payload (SSEP8b), launched on January 10, 2015, aboard SpaceX-5

SSEP Mission 7 to the International Space Station
launched June 28, 2015, aboard SpaceX-7, with 27 SSEP experiments (SSEP9 Odyssey payload): 24 Mission 7 experiments, 1 re-flight experiment from Mission 6, and 2 re-flight experiments from Mission 5; payload lost on rocket failure approximately 2 minutes after launch; 23 of 24 Mission 7 experiments, and 2 of the 3 re-flight experiments (1 from Mission 5 and 1 from Mission 6), were reconstituted as Odyssey II payload (SSEP9b) and launched April 8, 2016, aboard SpaceX-8.

SSEP Mission 8 to the International Space Station
launched July 18, 2016, aboard SpaceX-9, with 15 SSEP Mission 8 experiments (SSEP10 Kitty Hawk payload)

SSEP Mission 9 to the International Space Station
launched February 19, 2017, aboard SpaceX-10, with 22 SSEP experiments (SSEP11 Endeavor payload): 21 SSEP Mission 9 experiments and 1 re-flight experiment from Mission 7

SSEP Mission 10 to the International Space Station
launched June 3, 2017, aboard SpaceX-11, with 11 SSEP Mission 10 experiments (SSEP12 Casper payload)

SSEP Mission 11 to the International Space Station
launched August 14, 2017, aboard SpaceX-12, with 21 SSEP Mission 11 experiments and 1 SSEP Mission 9 experiment (SSEP13 America payload)

SSEP Mission 12 to the International Space Station
launched June 29, 2018, aboard SpaceX-15, with 34 SSEP Mission 12 experiments (SSEP14 Mercury payload)

SSEP Mission 13 to the International Space Station
launched July 25, 2019, aboard SpaceX-18, with 41, SSEP Mission 13 experiments (SSEP15 Gemini payload)

SSEP Mission 14 to the International Space Station
expected launch Summer 2020, aboard SpaceX-21, with 33 SSEP Mission 14 experiments (SSEP16 Apollo payload)

NEW OPPORTUNITY SSEP Mission 15 to the International Space Station
expected launch Spring/Summer 2021, aboard vehicle TBD, with XX SSEP Mission 15 experiments (SSEP17 Skylab payload)

Flight Opportunity Status

SSEP on STS-134 and STS-135, and Missions 1 through 12 to ISS have now been completed. Missions 13 and 14 teams will be reporting on experiment design and results at the 2020 SSEP National Conference in Summer 2020. Operations for Mission 14 started in the 32 participating communities in September 2019, with flight experiments selected mid-December 2019. The 33 Mission 14 flight experiments are now undergoing Flight Safety Review at the Toxicology Office at NASA’s Johnson Space Center in Houston. The Apollo payload of Mission 14 experiments is currently projected to launch in summer 2020 on SpaceX-21.

Mission 15 to ISS was announced on February 3, 2020, with a program start in September 2020. Communities across the U.S., Canada, and more broadly internationally, are invited to participate (see the Mission 15 Announcement of Opportunity).

Further Reading

We invite you to explore the SSEP Launch and On-Orbit Operations History page, which provides a sense of the already rich history of the SSEP Program. Here you will find s list of SSEP missions and payload designations, videos of all SSEP launches, a list of all astronauts that have operated SSEP experiments, and videos of astronauts operating the experiments.

To gauge program impact, you are invited to read the In Our Own Words and the SSEP In the News pages, and explore the Showcase of Community-Created Videos, at the separate SSEP Community Network Hubsite. You are also invited to explore the Full SSEP National Blog Archive, which documents the history of the program since inception.

The Student Spaceflight Experiments Program (SSEP) is a program of the National Center for Earth and Space Science Education (NCESSE) in the U.S., and the Arthur C. Clarke Institute for Space Education internationally. It is enabled through a strategic partnership with DreamUp PBC and NanoRacks LLC, which are working with NASA under a Space Act Agreement as part of the utilization of the International Space Station as a National Laboratory. SSEP is the first pre-college STEM education program that is both a U.S. national initiative and implemented as an on-orbit commercial space venture.