These appear to be algae based plankton. These plankton are slow to move because they are algae based. They use the suns energy to turn carbon dioxide into sugars which equals food for them, and grow well on the glass and solar panels because of all the sunlight reflecting there.
Now Russian astronauts announced to the world that they found large plankton growing on the space stations solar panels about 3-4 years ago. Russia…not NASA announced it. It was in world news…but finally here are some videos of the creatures. You are looking at aliens. Non intelligent, but nevertheless…alive. As far as I know, its the first photos of the actual plankton themselves.
CLICK ON THE VIDEO HERE >>
KEN PFEIFER WORLD UFO PHOTOS AND NEWS
THANKS TO https://www.etdatabase.com
and Scott C. Waring