In-Flight STEM Downlinks Expedition 74 proposal period is now closed. For Expedition 75 downlink proposals, look for more information this fall.
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.

Upcoming Downlink Events

The following information is subject to change.

August 20, 2025
10:00 a.m. – 12:00 p.m. Central Time (Tentative)
PACER Center
Bloomington, Minnesota
Astronauts Michael Fincke and Zena Cardman
Watch on Learn With NASA’s Youtube channel

August 27, 2025
8:00 a.m. – 10:00 a.m. Central Time (Tentative)
Glen Oak High School
Canton, Ohio
Astronauts Michael Fincke and Zena Cardman
Watch on Learn With NASA’s Youtube channel

September 5, 2025
9:00 a.m. – 11:00 a.m. Central Time (Tentative)
The Computer School
New York, New York
Astronauts Jonny Kim and Kimiya Yui
Watch on Learn With NASA’s Youtube channel

October 7, 2025
11:00 a.m. – 1:00 p.m. Central Time (Tentative)
DaVinci Science Center
Allentown, Pennsylvania
Astronauts Michael Fincke and Zena Cardman
Watch on Learn With NASA’s Youtube channel

October 21, 2025
9:00 a.m. – 11:00 a.m. Central Time (Tentative)
Queens Borough Public Library
Jamaica, New York
Astronauts Michael Fincke and Zena Cardman
Watch on Learn With NASA’s Youtube channel

November 4, 2025
10:00 a.m. – 12:00 p.m. Central Time (Tentative)
Utah State University Space Dynamics Laboratory
North Logan, Utah
Astronauts Michael Fincke and Zena Cardman
Watch on Learn With NASA’s Youtube channel

November 10, 2025
9:00 a.m. – 11:00 a.m. Central Time (Tentative)
University of Missouri Pre-Employment Transition Services Program
Columbia, Missouri
Astronauts Michael Fincke and Kimiya Yui
Watch on Learn With NASA’s Youtube channel