The proposal period for In-Flight STEM Downlinks Expedition 75 is closed.

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.

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

Upcoming Downlink Events

The following information is subject to change.

Feb. 7, 2026
11:20 a.m. – 11:40 a.m. Central Time
DaVinci Science Center
Allentown, Pennsylvania
Astronaut Chris Williams
Watch on Learn with NASA’s Youtube channel