![Astronauts holding equipment with Hubble behind them in space.](https://science.nasa.gov/wp-content/uploads/2023/05/hubble-fgs-jpg.webp?w=4096&format=png)
SM2: Fine Guidance Sensor (FGS) Setup
One of Hubble's Fine Guidance Sensors is being exchanged by astronaut Gregory J. Harbaugh during the Servicing Mission 2. Gregory J. Harbaugh on the arm w/the Fine Guidance Sensor (FGS).
Credits: NASA
Image CreditNASA
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