We\u2019re fortunate to live in these times. Multiple space telescopes feed us a rich stream of astounding images that never seems to end. Each one is a portrait of some part of nature\u2019s glory, enriched by the science behind it all. All we have to do is revel in the wonder. <\/p>\n
<\/p>\n The ESA\u2019s Euclid space telescope is the latest one to enrich our inboxes. It was launched on July 1st, 2023, and delivered its first images in November of that year. Now, we have five new images from Euclid, as well as the first science results from the wide-angle space telescope. <\/p>\n \u201cThey give just a hint of what Euclid can do.\u201d<\/p>\n Valeria Pettorino, ESA\u2019s Euclid Project Scientist.<\/cite><\/p><\/blockquote>\n<\/figure>\n The images demonstrate the telescope\u2019s power and its ability to address some of the deepest questions we have about the Universe. They are also impressive because of their visual richness and because they took only 24 hours of the telescope\u2019s expected six years of observing time. <\/p>\n \u201cEuclid is a unique, ground-breaking mission, and these are the first datasets to be made public \u2013 it\u2019s an important milestone,\u201d says Valeria Pettorino, ESA\u2019s Euclid Project Scientist. \u201cThe images and associated science findings are impressively diverse in terms of the objects and distances observed. They include a variety of science applications, and yet represent a mere 24 hours of observations. They give just a hint of what Euclid can do. We are looking forward to six more years of data to come!\u201d<\/p>\n The leading image is the most stunning and perhaps the most relatable. It shows Messier 78, aka NGC 2068. It\u2019s a reflection nebula and star-forming region contained in the vast Orion B molecular cloud complex. Euclid used its infrared capabilities to see through the dust that shrouds the star-formation region. It\u2019s given us our most detailed look at the filaments of gas and dust that give the region its ghostly appearance. <\/p>\n Euclid can detect objects that are just a few times more massive than Jupiter, an impressive feat. In its M78 image, it found over 300,000 objects in that mass range. <\/p>\n One of Euclid\u2019s objectives is to study dark matter and how it\u2019s distributed in the Universe. It uses gravitational lensing to probe dark matter, and its image of the Abell 2390 galaxy cluster exhibits the tell-tale curved arcs of light coming from distant background objects created by gravitational lensing. The image also shows more than 50,000 galaxies. <\/p>\n Most of the stars currently forming in the Universe are forming in spiral galaxies. Euclid captured this image of NGC 6744 as an archetype of that galaxy type. The telescope\u2019s wide-angle lens and depth of field capture the entire galaxy and also small details. It shows lanes of dust that emerge as spurs on the spiral arms. <\/p>\n With this image, astronomers can map individual stars and the gas that feeds their formation. They can also identify globular clusters and new dwarf galaxies. Euclid already found one new dwarf galaxy astronomers have never seen before, which is impressive for a galaxy that\u2019s already been studied so intently. <\/p>\n Euclid also imaged another galaxy cluster, Abell 2764. This cluster contains hundreds of galaxies within a halo of dark matter. Euclid\u2019s impressive wide-field view comes into play in this image. Not only does it show Abell 2764 in the image\u2019s upper right, but it also shows other clusters that are even more distant, multiple background galaxies, and interacting galaxies with their streams of stars. <\/p>\n The image highlights one of Euclid\u2019s other capabilities. The foreground star is in our own galaxy, and when viewed with a telescope, its diffuse light creates a halo that obscures distant objects behind it. Euclid was built to minimize that diffuse halo effect. The disturbance from the star\u2019s diffuse light is minimal, meaning Euclid can see distant background objects near the star\u2019s line of sight. <\/p>\n The final of the five new images is of galaxies in the Dorado Group. Euclid\u2019s image shows signs of galaxies merging. The Dorado Group is a relatively young group, and many of its member galaxies are still forming stars. The image helps astronomers study how galaxies form and evolve inside halos of dark matter. <\/p>\n A zoomed-in image shows more detail of the main pair of galaxies in the image. Euclid\u2019s unique large field-of-view and high spatial resolution means that for the first time, astronomers can use the same instrument and observations to deeply study tiny objects the size of star clusters, intermediate objects like the central regions of galaxies, and larger features like tidal tails in one large region of the sky. <\/p>\n \u201cThe beauty of Euclid is that it covers large regions of the sky in great detail and depth, and can capture a wide range of different objects all in the same image \u2013 from faint to bright, from distant to nearby, from the most massive of galaxy clusters to small planets.\u201d<\/p>\n ESA Director of Science, Prof. Carole Mundell<\/cite><\/p><\/blockquote>\n<\/figure>\n Prior to Euclid, astronomers had to use small chunks of data to painstakingly catalogue globular clusters around galaxies. But Euclid\u2019s wide images capture far more data in a single image, simplifying the task. Globular clusters provide important clues to how galaxies evolve over time. <\/p>\n Euclid\u2019s mission is only starting. The telescope\u2019s images so far have no equivalent, and there\u2019s much more to come. Euclid hasn\u2019t even begun its main survey yet. That survey will comprise both a wide survey covering about 15,000 square degrees of the sky and a deep survey covering about 50 square degrees. <\/p>\n \u201cIt\u2019s no exaggeration to say that the results we\u2019re seeing from Euclid are unprecedented,\u201d says ESA Director of Science, Prof. Carole Mundell. \u201cEuclid\u2019s first images, published in November, clearly illustrated the telescope\u2019s vast potential to explore the dark Universe, and this second batch is no different.\u201d<\/p>\n \u201cThe beauty of Euclid is that it covers large regions of the sky in great detail and depth, and can capture a wide range of different objects all in the same image \u2013 from faint to bright, from distant to nearby, from the most massive of galaxy clusters to small planets,\u201d said Mundell. \u201cWe get both a very detailed and very wide view all at once. This amazing versatility has resulted in numerous new science results that, when combined with the results from Euclid\u2019s surveying over the coming years, will significantly alter our understanding of the Universe.\u201d<\/p>\n The scientific papers released with these images are available here. <\/p>\n\n
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