Down to just two gyroscopes, Hubble's science operations will continue
Briefly

The Hubble Space Telescope will function on just a single gyroscope, limiting some scientific operations and taking longer to point the telescope. This is due to gyroscopes failing over the years, leading to safe mode incidents.
NASA's plan is to operate the Hubble telescope on a single gyroscope with the second one as a 'reserve' option. Despite the limitations, officials believe it won't significantly restrict the telescope's ability to conduct meaningful science.
Read at Ars Technica
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