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Servicing Mission 4 Portal

Read the online Star Witness news story on preparations for Servicing Mission 4

Image of HST during a previous servicing mission in the shuttle bay.

The Mission Was a Success!

Click here to read how the historic, May 2009 mission unfolded, day by day.

The work that makes it happen

Check out our features on the people, from scientists to science writers, who play a role in the Hubble mission.

SM4 Image Gallery: View mission photos

SM4 Video Gallery: View mission videos

HST Trivia: Fun facts about Hubble

SM4 Q&A: Commonly asked questions

Hubble Space Telescope lithograph:
Preview and download a PDF on the telescope

SM4 glossary: Look it up here!

Be the
Mastermind
Behind the
Mission:

Piece together
the steps of a
servicing mission in this
activity based on SM3B

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Hubble's
Servicing Mission 4

Relive astronauts' epic, May 2009 journey to service Hubble.