A Celebration of Life service was held on Saturday, March 7, 2020 for NASA mathematician Katherine Johnson at the Hampton University Convocation Center.
NGC 3887 is one of many galaxies in our universe with spiral arms, just like our own Milky Way. Until the 1960s, the behavior of spiral arms was an astronomical puzzle. The arms emanate from a spinning core and «should» therefore become wound up ever more tightly over time. Instead, they move more slowly, like an interstellar traffic jam.