Scientists created one of the largest simulations of our universe ever – about the size of 500,000 HD movies – Image for illustrative purposes only (Image credits: Unsplash)
Astronomers have made one of the largest collections of universe simulations freely available to researchers worldwide. The FLAMINGO project delivered more than 2.5 petabytes of data, a volume roughly equivalent to 500,000 high-definition movies.[1][2] This massive dataset traces the evolution of galaxies, dark matter, and cosmic structures across billions of years, offering new tools to test theories of the cosmos.
Unveiling the FLAMINGO Project
The FLAMINGO initiative emerged from the Virgo Consortium, a collaboration centered at institutions like Leiden University and Durham University’s Institute for Computational Cosmology. Researchers developed these simulations to overcome limitations in earlier models that focused solely on dark matter. By incorporating full hydrodynamical physics, the project captures how ordinary matter interacts with invisible components over cosmic history.[3]
FLAMINGO stands for Full-hydro Large-scale structure simulations with All-sky Mapping for the Interpretation of Next Generation Observations. Teams calibrated the models against real-world data, such as the present-day galaxy stellar mass function and gas fractions in nearby clusters. This approach ensures the virtual universes align closely with telescope observations. The simulations ran on the COSMA-8 supercomputer within the UK’s DiRAC facility, demanding immense computational power.[1]
The Monumental Scale of the Simulations
FLAMINGO produced 22 hydrodynamical simulations alongside 16 gravity-only counterparts, spanning vast cosmic volumes. The flagship run, L2p8_m9, models a cube 2.8 gigaparsecs on each side – stretching billions of light-years – with trillions of particles representing baryons, dark matter, and neutrinos. High-resolution variants like L1_m8 pack even finer detail into 1-gigaparsec boxes.[4]
Data products include snapshots of cosmic epochs, halo and galaxy catalogs, all-sky lightcone maps in HEALPix format, and power spectra for statistical analysis. The total output exceeds 2.3 petabytes, hosted on Durham’s DiRAC Memory Intensive Service. Users access it via a web portal that lets them query and download specific subsets, bypassing the need to handle the full archive locally.[2]
| Simulation | Box Size | Baryonic Particles | Key Features |
|---|---|---|---|
| L2p8_m9 | 2.8 Gpc | 5040³ | Largest volume hydro run |
| L1_m8 | 1 Gpc | 3600³ | Highest resolution |
| L1_m9 | 1 Gpc | 1800³ | Fiducial calibration |
| L1_m10 | 1 Gpc | 900³ | Lower resolution variant |
Capturing the Universe’s Hidden Dynamics
These simulations go beyond simple gravity by including radiative cooling, star formation, supernova feedback, stellar mass loss, chemical enrichment, and active galactic nuclei effects. Neutrinos appear as explicit particles, reducing noise in their distribution. Variations test different feedback strengths, cosmologies, and even dark matter properties, such as adding extra particles.[3]
Dark matter halos form the scaffolds for galaxy growth, while baryonic processes shape their luminous components. The models reveal how feedback from stars and black holes regulates gas flows, influencing cluster properties and large-scale structure. Calibrations used machine learning to fine-tune parameters efficiently across the suite.[2] Researchers now compare these outputs directly with surveys from telescopes probing the cosmic web.
Pathways to Cosmic Insights
The public release, detailed in a 2026 paper by Helly and colleagues, democratizes access to this resource. Scientists worldwide can probe questions about dark energy’s role, neutrino masses, and galaxy formation mechanisms. The dataset supports analyses of weak lensing, X-ray emissions, and cluster abundances, bridging simulations with upcoming observatories.[1]
Early applications already highlight baryonic effects on structure growth, refining predictions for next-generation missions. As more teams dive into the archive, FLAMINGO stands ready to reshape our grasp of the universe’s 13.8-billion-year saga. This tool promises to turn raw computational power into tangible advances in cosmology.