This image is from Materials International Space Station Experiment (MISSE) 2, part of STS-105 mission in 2001. Full report is at https://ntrs.nasa.gov/api/citations/20070002707/downloads/20070002707.pdf
This image is from Materials International Space Station Experiment (MISSE) 2, part of STS-105 mission in 2001. Full report is at https://ntrs.nasa.gov/api/citations/20070002707/downloads/20070002707.pdf
41 is the number of polymers tested in the PEACE, the whole MISSE program involves several material classes with more than 1000 samples.
https://en.wikipedia.org/wiki/Materials_International_Space_Station_Experiment