## With PRIMA, NASA will try to build a billion-dollar space telescope in record time NASA’s PRIMA mission will use spare parts from Webb to do major science at a lower cost. The first in a new class of space telescopes is on track to reach the launch pad in the early 2030s, NASA announced this week. The PRIMA mission will be the first of NASA’s Probe Explorers, a new line of observatories intended to do more science for less money. The agency’s space telescopes typically fall into lower-cost “Explorer-class” missions, with cost caps in the range of a few hundred million dollars, or flagship…