Credit: NASA/JHUAPL
he solar array cooling system for the Parker Solar Probe spacecraft — one element of which is the large, square black radiator visible at center, one of two that will be installed — is shown undergoing thermal testing at NASA Goddard Space Flight Center in Greenbelt, Maryland, in late February. At left: William “Chip” Delmar and C. Jack Ercol of the Johns Hopkins Applied Physics Laboratory; on right, Mike Micciolo of NASA Goddard and APL’s Eric Wallis.