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Behind the scenes: Euclid Galactic Bulge Survey (Q2)

Consortium, ESA, People, Publication, Science, Telescope and instruments / By

On 23 March 2025, the Euclid space telescope targeted an unusual location: a region near the Galactic Centre, capturing an exceptionally deep, wide-field, and high-resolution view of the Milky Way’s inner bulge. Over roughly 24 hours, the telescope observed nine contiguous fields, covering a total of 4.8 square degrees, capturing the images of roughly 60 million stars in total. Now the images and catalogues are made public to the world – we take the opportunity to peek behind the curtain to see what makes this image so special and which challenges had to be overcome.

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Behind the scenes: Euclid Galactic Bulge Survey (Q2)Read More »

Behind the scenes: Euclid Galactic Bulge Survey (Q2) Read More »

Euclid and HST join forces to look at a Cat’s Eye

Consortium, ESA, Science, Telescope and instruments / By

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.

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Euclid and HST join forces to look at a Cat’s EyeRead More »

Euclid and HST join forces to look at a Cat’s Eye Read More »

Clouds, darkness, dust, … and light

Consortium, Science, Telescope and instruments / By

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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Clouds, darkness, dust, … and lightRead More »

Clouds, darkness, dust, … and light Read More »

Here Comes the Sun…

Consortium, Telescope and instruments / By

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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Here Comes the Sun…Read More »

Here Comes the Sun… Read More »

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