Astronaut Suni Williams left NASA late last month after 27 years of service. She spent a total of 608 days in space, more than all but one other American astronaut.
We now have direct images of two supermassive black holes: M87* and Sag A*. The fact that we can capture such images is remarkable, but they might be the only black holes we can observe. That is, unless we take radio astronomy to a whole new level.

