{"data":{"id":2371,"lang":"en","title":"Largest-Ever Supernova Catalog Suggests Dark Energy Is Changing Over Time","summary":"A University of Queensland-led catalog of 2,884 exploding white dwarf stars adds fresh evidence that dark energy's strength may change over time, echoing a 2024 DESI signal.","category":"science","category_label":"Science","published_at":"2026-09-14T14:01:32Z","updated_at":"2026-09-14T14:01:32Z","url":"https://techtools.cz/tools/news/article/2371-largest-ever-supernova-catalog-suggests-dark-energy-is-changing-over-time","api_url":"https://techtools.cz/news-api/v1/articles/2371?lang=en","markdown_url":"https://techtools.cz/news-api/v1/articles/2371.md?lang=en","image_url":"https://news.uq.edu.au/sites/default/files/styles/uqds_card/public/2026-09/sci-supernova-adobe-1080.jpg?itok=ZuCuSaPQ","word_count":190,"reading_time_minutes":1,"sources":[{"url":"https://news.uq.edu.au/2026-09-big-supernova-dataset-challenges-dark-energy-theory","domain":"news.uq.edu.au"},{"url":"https://www.space.com/astronomy/black-holes/the-largest-supernova-catalog-ever-made-has-some-news-about-the-dark-universe","domain":"space.com"}],"translation":{"lang":"cs","id":2444,"title":"Dosud největší katalog supernov naznačuje, že se temná energie v čase mění","url":"https://techtools.cz/tools/news/clanek/2444-dosud-nejvetsi-katalog-supernov-naznacuje-ze-se-temna-energie-v-case-meni","api_url":"https://techtools.cz/news-api/v1/articles/2444?lang=cs"},"content":"Researchers at the University of Queensland have compiled the most comprehensive catalog of exploding white dwarf stars ever assembled, combining 30 years of observations from surveys including the Dark Energy Survey, Pan-STARRS, the Sloan Digital Sky Survey and the Carnegie Supernova Project into 2,884 Type Ia supernovae, used as cosmic distance markers.\n\nPhD candidate Ryan Camilleri, who led the compilation, said the team \"rebuilt three decades of astronomical observations into a single, consistent framework.\" Rather than confirming the standard model of cosmology, which treats dark energy as fixed and unchanging, the dataset adds evidence that dark energy's strength may vary over time -- backing a similar signal seen in 2024 data from the Dark Energy Spectroscopic Instrument (DESI).\n\nAstrophysicist Tamara Davis said the team's earlier 2024 supernova data from the Dark Energy Survey \"first showed hints that dark energy may be time varying, and this new compilation also sees a deviation from the standard model although in a slightly different direction.\" She added that the research could eventually help explain how gravity and quantum physics fit together. A follow-up program, DEBASS, will add hundreds more supernovae to refine the picture."}}