In-Flight STEM Downlinks Expedition 74 proposal period is now closed. Expedition 75 downlink proposal period opens on Wednesday, August 20, 2025 to Wednesday, October 1, 2025.
Please reach out to the Downlinks team at JSC-Downlinks@mail.nasa.gov with questions.

In-flight STEM Downlinks allow participants and facilitators to interact with astronauts onboard the International Space Station. These opportunities are available to both formal and informal U.S.-based organizations.

Expedition 74 downlinks will tentatively occur between September 2025 and March 2026.

How To Apply

Application steps will be posted closer to the Expedition 75 downlink proposal period of Wednesday, August 20, 2025 to Wednesday, October 1, 2025.

Please reach out to the Downlinks team at JSC-Downlinks@mail.nasa.gov with questions.