Recently it was discovered that the defrosting method worked and Euclid’s vision was restored. This success validates the mission team’s plan to ensure the functionality of the Euclid optical system for the remainder of the mission.
The problem was discovered when scientific operations experts noticed a gradual decrease in the light measured by the telescope’s VIS instrument. It turned out that ice formed on the mirrors of the device due to condensation of water vapor. After months of research and testing, the team identified the source of the problem and began working on a solution.
The obvious solution was to heat the Euclid, but this can cause deformation of the mechanical structure and requires special attention. So the team began heating the individual mirrors, which restored the telescope’s view. However, this was a temporary solution and a long-term strategy for regular defrosting is currently being sought. ESA promises to continue monitoring the telescope and share new results with the public.
Source: Ferra
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