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Hubble Servicing Mission 4 Blog

Second spacewalk today

15 May 2009, 12:46 UTC
Second spacewalk today
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Today, astronauts Mike Good and Mike Massimino will conduct the second EVA (or spacewalk). On the agenda will be the replacement of three rate sensing units, part of the important gyro assemblies. The gyro assemblies are vital components as they sense vehicle motion and provide rate data to help aim Hubble precisely for its science observations.

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