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Hubble Servicing Mission 4 Blog

NASA’s latest update

16 May 2009, 15:19 UTC
NASA’s latest update
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16 May 2009 05:10:28 PM GMT+0200

We are now one hour, 30 minutes into today’s spacewalk.
COSTAR has been removed from Hubble and now is temporarily stowed. COSTAR is the corrective optics package installed on the first Hubble servicing mission that enabled the scientific instruments to compensate for the telescope’s misshapen primary mirror.

Both crew members will next move to the protective enclosure that the new Cosmic Origins Spectrograph was launched in and work together to remove it. They will need to disconnect a ground strap, disengage locks and release latches before Feustel will be able to remove the equipment from the carrier and make his way via robotic arm back to the telescope for its installation. Feustel will manoeuvre the equipment into place and engage its two latches. Grunsfeld will then hook up four connectors and a ground strap. Following that installation, the only thing left to do on the task will be to store the COSTAR in the protective enclosure that previously housed the spectrograph.

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