Video: Atlas 5 launch with GOES-S viewed from KSC press site (members only)

A heavy-lift Long March 5 rocket propelled China’s first Mars landing mission toward the Red Planet on Thursday after launching from a seaside spaceport on Hainan Island, the second of three international Mars probes expected to depart planet Earth this month.

Launches of interplanetary missions can only depart Earth when the positions of the planets are just right, and officials managing the development of probes set for launch in 2021 and 2022 to explore asteroids and Jupiter says construction milestones and reviews are proceeding to keep the projects on schedule despite the coronavirus pandemic.

The rocket, designated FLTA006 by Firefly Aerospace, carried a technology demonstration for Lockheed Martin’s LM400 Technology Demonstration (Tech Demo) satellite bus. The mission, dubbed ‘Message in a Booster,’ lifted off at the beginning of the Tuesday launch window at 6:37 a.m. PDT (9:37 a.m. EDT, 1337 UTC).