abstract:The Shapiro time delay effect, or gravitational time delay effect, is one of the four classic solar system tests of general relativity. Radar signals passing near a massive object take slightly longer to travel to a target and longer to return than they would if the mass of the object were not present.
The resignation of Mary Shapiro is widely viewed as the cause of the delay, with the appointment of her successor, Mary Jo White seen as both the end and the reason for the delay continue.