Photos: Delta 4-Heavy with Orion on eve of launch

NASA announced Thursday that work on the Space Launch System heavy-lift rocket and Orion crew capsule at facilities in Louisiana and Mississippi is being halted due to the spreading coronavirus pandemic, a stoppage that could force further delays on the already behind-schedule and over-budget programs. Meanwhile, NASA officials are making plans to continue working on the agency’s next Mars rover to keep it on schedule for launch later this year, even if the virus forces further closures.

Officials hailed an action-packed three-minute test flight Tuesday over Cape Canaveral that exercised the Orion spacecraft’s launch abort rocket, a key safety system on the capsule NASA is developing to carry astronauts back to the moon.

Lessons learned during preparations leading up to the first orbital test flight of NASA’s Orion spacecraft in December have prompted engineers to recommend changing the design of the crew capsule’s heat shield for future missions to the moon, Mars, or an asteroid, according to Lockheed Martin officials.