Snapshots from Atlas 5 launch

Three robotic Mars missions launched from Earth last month have begun fine-tuning their trajectories through the solar system with the first in a series mid-course corrections to take aim on the Red Planet for arrival next February.

The update comes after NASA said it and Boeing completed ground hot fire testing of a reaction control system (RCS) to better understand some of the in-flight anomalies seen during the spacecraft’s rendezvous and docking with the International Space Station.

SpaceX will sacrifice a Falcon 9 rocket Sunday in a fiery test a minute-and-a-half after liftoff from Florida’s Space Coast to prove the company’s Crew Dragon spacecraft can safely push astronauts away from a failing launch vehicle, simulating a daring maneuver that would only be attempted on a piloted mission during an in-flight emergency.