A key thing is that several years ago they realised that the reaction wheels were failing earlier than planned, some nifty deep analysis found the issue and I h

A key thing is that several years ago they realised that the reaction wheels were failing earlier than planned, some nifty deep analysis found the issue and I hope that this means they’ll last long enough. The Reaction wheels are used to rotate the space craft without the use of fuel, and Scott Manly, as ever did a great video on this: https://youtu.be/KibT-PEMHUU https://youtu.be/KibT-PEMHUU