“Mars 2020 Rover's 7-Foot-Long Robotic Arm Installed”. mars.nasa.gov (2019年6月28日). 2019年7月1日閲覧。 “The main arm includes five electrical motors and five joints (known as the shoulder azimuth joint, shoulder elevation joint, elbow joint, wrist joint and turret joint). Measuring 7 feet (2.1 meters) long, the arm will allow the rover to work as a human geologist would: by holding and using science tools with its turret, which is essentially its "hand".” この記述には、アメリカ合衆国内でパブリックドメインとなっている記述を含む。