Exploring The Terminator | International Space Station

Exploring The Terminator | International Space Station

Expedition 73 Flight Engineer and Japan Aerospace Exploration Agency (JAXA) Astronaut Kimiya Yui: "Right now, the ground directly below the ISS is alternating between day and night, but the ISS is constantly bathed in sunlight and in a state of white nights."

"In such a state, the boundary between day and night is passed slowly in a nearly parallel form, so it is possible to gaze at the sunset for a long time (I casually call the pink line the sunset front, lol)."

The terminator is the line that separates night and day on Earth.

Follow Expedition 74:

https://blogs.nasa.gov/spacestation/

Expedition 74 Crew

Station Commander: Mike Fincke (NASA)

JAXA Flight Engineer (Japan): Kimiya Yui

Roscosmos (Russia) Flight Engineers: Oleg Platonov, Sergey-Kud Sverchkov, Sergei Mikaev

NASA Flight Engineers: Zena Cardman, Chris Williams

An international partnership of space agencies provides and operates the elements of the International Space Station (ISS). The principals are the space agencies of the United States, Russia, Europe, Japan, and Canada.

Image Credit: Japan Aerospace Exploration Agency (JAXA)/K. Yui

Duration: 36 seconds

Date: Dec. 9, 2025

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