Launched this past summer, the space observatory’s commissioning hasn’t been perfect, but the team remains optimistic.
“Only the science images can provide us with absolute certainty that Euclid’s pointing is performing well,” said Euclid Project Manager, Giuseppe Racca, in the same release. “However, all evidence so far makes us very optimistic. We will continue to keep our fingers tightly crossed, but the restart of the performance verification phase gets nearer every day.”
Euclid needs to be shielded from the Sun’s bright light in order to peer into the distant cosmos. But some sunlight is sneaking into the eyeline of the VIS instrument by reflecting off a thruster bracket that juts out from the shadow produced by the spacecraft’s sunshield. The Euclid team believes the reflected light is showing up in some of VIS’s test observations.
ngles, ruining some of the telescope’s data. An analysis of the telescope revealed that depending on solar activity—solar flares vary in their frequency and intensity—Euclid could lose 3% of its data if the issue is unaddressed. The Fine Guidance Sensor issue is currently being handled, but the light issue will require different approaches. According to the release, repeat observations and data processing could reduce the impact of the X-rays on observations, and the telescope’s survey can be reprogrammed to mitigate the sunlight.Euclid’s undertaking is a vast one—literally as vast as the cosmos and its darkest secrets.
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