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Euclid and HST join forces to look at a Cat’s Eye
Euclid covers a much larger area in every image compared to previous space telescopes, all while resolving details. The Hubble Space Telescope has a roughly 2x larger mirror than Euclid and can still resolve structures twice as fine, but over a much smaller area: It could in principle carry out Euclid’s Wide Survey, but it would take 100s of years instead of only six. So what happens when combining Hubble’s eye for detail and Euclid’s field of view? Something incredible is the result.
…Euclid and HST join forces to look at a Cat’s EyeRead More »
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Portrait of Euclideans – Ismael Tereno
Euclid is a space mission planned, built, and operated by more than 2000 scientists and engineers across Europe and other countries. In Portraits of Euclideans we showcase the people behind the mission.
In this portrait: Ismael Tereno, Euclid Survey Scientist
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Yannick Mellier, 1958–2025
Au revoir Yannick! It is with greatest sadness that we have to announce the passing of Yannick Mellier, lead of the Euclid Consortium since 2011. Yannick has worked tirelessly to steer Euclid’s development from before its adoption as a mission by ESA to the first science results in 2025. Much of what the Consortium is today bears his mark – and the first flagship paper introducing the first Euclid science results is, and will be, a ‘Euclid Collaboration: Mellier et al.’
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Happy Holidays 2025
The Euclid Consortium wishes everyone joyful holidays at the end of 2025!
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Clouds, darkness, dust, … and light
Just recently, in early November 2025, ESA released Euclid’s image of ‘LDN 1641’, an actively star-forming region in the ‘sword’ region of the constellation Orion. This region was observed by Euclid in near-infrared wavelengths early on in the mission, during a test for the spacecraft’s ability to orient itself in the sky: will the spacecraft get confused if it has very little information for orientation? We now added a ground-based image in visible light and created a comparison – a tale of young stars and clouds of dust, and the struggle for light trying to shine through strong absorption.
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Here Comes the Sun…
Were you lucky enough to see the aurora earlier this week? Stronger than usual solar activity recently gave many people across the world a chance to see this spectacular light show – the result of eruptions of particles from the Sun travelling towards Earth and interacting with our planet’s atmosphere. But how was Euclid affected by this space weather…?
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