![Six people in white clean suits work on the underside of a replica of Hubble.](https://science.nasa.gov/wp-content/uploads/2023/03/careers-engineering-jpg.webp?w=4096&format=png)
Hubble Engineering
Astronauts, with the assistance of Hubble engineers, practice the replacement of a Rate Sensor Unit, a device that holds two gyroscopes, that are part of Hubble's pointing control system. Here they are seen replacing a unit in the High Fidelity Mechanical Simulator, a replica of Hubble's aft shroud, in a clean room at NASA's Goddard Space Flight Center. The Rate Sensor Unit, astronaut tool, and simulator were all engineered for the missions.
Credits: NASA / Michael Soluri
Image CreditNASA / Michael Soluri
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