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Euclid Consortium

A space mission to map the Dark Universe

The Mission
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Euclid Consortium Blog

Euclid pretty pictures gallery

By Knud Jahnke / 2024-12-23

Abell 2764 is a relatively nearby cluster of galaxies with a cosmological redshift of z=0.07, about 1.0 billion light years away. This cutout shows the core of the cluster. The tidal gravitational fields between the galaxies lead to notable distortions of their forms, and numerous diffuse stellar streams. The depth of this data set is 3x that of the Euclid Wide Survey. The image is a LRGB composite, where the brightness and spatial resolution (L) was provided by the VIS instrument, and the RGB colours by NISP. Total exposure times: VIS IE: 6720s NISP YE, JE, HE: 1046s each Credits: ESA/Euclid/Euclid Consortium/NASA, image processing by M. Schirmer (MPIA) and J.-C. Cuillandre (CEA, Paris Saclay)

Abell 2764 details

Abell 2764 is a relatively nearby cluster of galaxies with a cosmological redshift of z=0.07, about 1.0 billion light years away. The cluster is located at the upper right of this image, noticable by the concentration of numerous bright galaxies. The tidal gravitational fields between the galaxies lead to notable distortions of their forms, and numerous diffuse stellar streams. The area of this image corresponds to 43'x43', Euclid's standard field of view of the sky. The depth of this data set is 3x that of the Euclid Wide Survey. The image is a LRGB composite, where the brightness and spatial resolution (L) was provided by the VIS instrument, and the RGB colours by NISP. Total exposure times: VIS IE: 6720s NISP YE, JE, HE: 1046s each Credits: ESA/Euclid/Euclid Consortium/NASA, image processing by M. Schirmer (MPIA) and J.-C. Cuillandre (CEA, Paris Saclay)

Abell 2764

Abell 2390 is a massive galaxy cluster at a cosmological redshift of z=0.23, corresponding to a light-travel time of 2.8 billion years. The cluster center is visible near the centre of this Euclid image, as a concentration of hundreds of elliptical, yellowish galaxies. The cluster's mass is about 1.1x10^15 times that of our sun, or about 10000 times that of our own Galaxy. The enormous gravitational field of Abell 2390 leads to considerable distortions of the images of galaxies located further in the background of this cluster. This effect is known as strong gravitational lensing and leads to the numerous bent arcs near the cluster centre. While Euclid is expected to discover thousands of strong lensing clusters, only a small number of them will be as massive as A2390. The area of this image corresponds to about 43'x43', Euclid's standard field of view of the sky. The depth of this data set is 4x that of the Euclid Wide Survey. The image is a LRGB composite, where the brightness and spatial resolution (L) was provided by the VIS instrument, and the RGB colours by NISP. Total exposure times: VIS I: 8960s NISP YJH: 1395s each Credit: ESA/Euclid/Euclid Consortium/NASA, image processing by M. Schirmer (MPIA) and J.-C. Cuillandre (CEA, Paris Saclay)

Abell 2390

In November 2024, while scanning the southern sky close to the SMC, Euclid passed over 47 Tucanae, also known as NGC 104, a large globular cluster containing hundreds of thousands of ancient stars. Located about 15,000 light-years away in the constellation Tucana, it is the second-brightest GC on the sky, and one of the most massive ones in our Galaxy. The images is based on NISP exposures taken in the YJH filters. The field-of-view is 60'x60'. Crédits : ESA/Euclid/Euclid Consortium/NASA, J.-C. Cuillandre (CEA, Paris Saclay), and M. Schirmer (MPIA)

47 Tucanae

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