UCR Astronomers Map 164,000 Galaxies With JWST, Tracing Cosmic Web to 1 Billion Years After Big Bang
Updated
Updated · Universe Today · Jun 5
UCR Astronomers Map 164,000 Galaxies With JWST, Tracing Cosmic Web to 1 Billion Years After Big Bang
3 articles · Updated · Universe Today · Jun 5
Summary
A UCR-led team used James Webb Space Telescope data to build the most detailed cosmic web map yet, charting 164,000 galaxies and filament structures across deep cosmic time.
The COSMOS-Web project combined 152 wide-field observations over 255 hours, using JWST’s infrared sensitivity and sharper distance measurements to place faint galaxies into more precise time slices.
That let researchers trace large-scale structure back to about 1 billion years after the Big Bang—reaching into the era after the Cosmic Dark Ages and revealing detail earlier Hubble maps had blurred.
The survey covered 0.6 square degrees with NIRCam and 0.2 square degrees with MIRI, aiming to track galaxy evolution from reionization to today and probe dark matter’s role.
The team has released the mapping pipeline, mosaics, catalog and density maps publicly in COSMOS-Web Data Release 1.0, extending the long-running COSMOS survey that began in 2002.
Now that we've mapped the early universe's web, what is the next cosmic mystery the Webb telescope is aiming to solve?
How does mapping 164,000 ancient galaxies change our understanding of the invisible dark matter that dictates cosmic structure?
Could hidden anomalies within this new cosmic map reveal the first major cracks in our standard model of the universe?
COSMOS-Web Survey Unveils Largest, Deepest Map of the Early Cosmic Web with JWST
Overview
In June 2026, a team led by the University of California, Riverside unveiled the most detailed map of the cosmic web ever created, using the James Webb Space Telescope through the COSMOS-Web survey. This new map stands out for its exceptional depth and resolution, offering an unprecedented look at the universe’s large-scale structure and a clearer view of how its fundamental architecture has evolved. The team made the complete data package publicly available, reflecting a strong commitment to open science. This open access is expected to become a crucial resource for future studies of galaxy evolution and cosmology.