![Man in a white clean room suit looking at Hubble instruments in black boxes with wires coming out of the sides.](https://science.nasa.gov/wp-content/uploads/2023/08/36324177356-e64f81a20d-o.jpg?w=4096&format=jpeg)
Science Instrument Command and Data Handling Unit
Pictured is the Science Instrument Command and Data Handling (SI C&DH) unit that flew on Servicing Mission 4 in 2009, replacing the SI C&DH unit that failed on Hubble in 2008. The failure of the original SI C&DH unit led to Servicing Mission 4 being pushed back from September 2008 to May of 2009.
Credits: NASA / Michael Soluri
TakenDecember 17, 2008
Image CreditNASA / Michael Soluri
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