Before Euclid's observations, astronomers had identified about 1,000 strong gravitational lenses over decades of modern sky observation.
Sources
- Astronomers just found a new treasure trove of galaxies (nationalgeographic.com)
- https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_discovers_a_stunning_Einstein_ring (esa.int)
- https://www.euclid-ec.org/einstein-ring-in-ngc-6505/ (euclid-ec.org)
- https://www.aanda.org/articles/aa/full_html/2019/05/aa32797-18/aa32797-18.html (aanda.org)
- https://www.nature.com/articles/s41550-025-02616-5 (nature.com)
- https://physicstoday.aip.org/features/learning-to-see-gravitational-lenses (physicstoday.aip.org)
- https://arxiv.org/pdf/2503.15326 (arxiv.org)
- https://www.ucl.ac.uk/news/2025/mar/ultimate-discovery-machine-euclid-releases-first-batch-data (ucl.ac.uk)
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