CAL (Cold Atom Lab): The crew completed the last steps of the Fiber Optics inspections for Module 3 and closed out the CAL in Express Rack 7. The CAL produces clouds of atoms that are chilled to about one ten billionth of a degree above absolute zero – much colder than the average temperature of …
Click here for original story, ISS Daily Summary Report – 1/31/2020
Source: ISS Report