What environmental condition on the exterior of the station occurs on a 90-minute cycle?

Answer

Sharp temperature fluctuations between sunlight and shadow

As the station orbits, it passes between direct sunlight and shadow every ninety minutes, causing sharp shifts in temperature exposure for any life persisting on the exterior.

What environmental condition on the exterior of the station occurs on a 90-minute cycle?

#Videos

New Bacteria Discovered Aboard China's Space Station! - YouTube

SpacebacteriaChinaSpace Station