Collaborative projects – CosmoVerse • COST Action CA21136

The CosmoVerse network has grown to over 700 researchers that span the globe crossing the thematic areas of observational cosmology, with an exhaustive treatment of potential systematics, the development of new data analysis approaches for upcoming surveys and potential new physics models, as well as the construction of cosmological models that appropriately address the areas where the concordance model exhibits tensions. This has led to a number of collaborative projects which has focused the CosmoVerse network on specific community directed questions where the power of this network can be most effective.

Data challenge

CosmoVerse 2026 Data Challenge The Hubble tension remains one of the most prominent unresolved questions in modern cosmology. The CosmoVerse COST Action paves new routes for dialogue in an effort to better understand—and potentially resolve—this tension. To this end, the CosmoVerse 2026 Data Challenge will enable an intensive and inclusive

White paper

The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics The CosmoVerse White Paper, edited by Jackson Levi Said and Eleonora Di Valentino, is a collective effort from the community to review the state of the art and identify opportunities to address tensions in cosmology over

Cosmology Compilation Group

Cosmology Compilation Group The Cosmology Compilation Group (CCG) initiative is born out of the CosmoVerse White Paper (https://cosmoversetensions.eu/for-scientists/collaborative-projects/white-paper/), where several cosmological models are identified as promising. The aim of the CCG is to compare and contrast these and other active cosmological models in a statistically robust manner, using recent survey