Cutting-edge heat shield installed on Parker Solar Probe: NASA

In this image released by NASA, technicians and engineers perform light bar testing on NASA's Parker Solar Probe at the Astrotech processing facility in Titusville, Florida, near NASA's Kennedy Space Center, on June 5, 2018. The Parker Solar Probe will launch on a United Launch Alliance Delta IV Heavy rocket from Space Launch Complex 37 at Cape Canaveral Air Force Station in Florida no earlier than August 4, 2018. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona.[File Photo: AFP/Glenn BENSON]