Jason 3 Mission Science Briefing

Astronauts Doug Hurley and Bob Behnken give a video tour of their new SpaceX Crew Dragon spacecraft as they close in on a docking with the International Space Station on May 31, 2020.

Concerns about the coronavirus pandemic have prompted officials to postpone the planned March 30 launch of Argentina’s SAOCOM 1B radar observation satellite from Cape Canaveral aboard a SpaceX Falcon 9 rocket, officials said Tuesday.

Held down by heavy-duty restraints, a Falcon 9 rocket fired up its nine Merlin engines for more than three seconds Thursday evening in a key readiness test before launching with a commercial television broadcast satellite next week.