World's Largest Camera Reveals Over 500,000 Galaxies in a Single Stunning Image

The Vera C. Rubin Observatory's 3.2-gigapixel LSST Camera — the largest digital camera ever built, roughly the size of a small car — has released its first deep science image of the COSMOS field. The composite reveals over 500,000 galaxies and 50,000 stars in a single sweeping view, offering astronomers an unprecedented look at the distant universe . Released on July 31, 2026, as part of the Early Data Preview 2 (EDP2) release, the image marks the observatory's first data preview based on LSST Camera observations .

What the Image Reveals

The image captures the COSMOS field in the constellation Sextans, a region deliberately chosen because it looks away from the crowded plane of the Milky Way, providing an unobstructed, dust-free view of the distant universe . The field is packed with a variety of celestial objects:

• Hundreds of thousands of distant galaxies forming an immense range of shapes: smooth, pebble-like blobs, faint stretched lines, and diffuse smudges scattered between foreground stars
• Galaxy clusters spanning an enormous range of distances and cosmic ages
• Approximately 50,000 foreground stars belonging to the Milky Way, appearing as sharp points in blue, yellow, orange, and red
• Wispy gray clouds of galactic dust drifting across the center and right sides of the image

The galaxies visible in the image vary in morphology from smooth elliptical blobs to elongated, edge-on spirals appearing as faint stretched lines — a representative sample of the diverse galaxy types across cosmic time .

How the Image Was Constructed

The composite was created by stacking hundreds of individual observations captured with the LSST Camera's 3.2-gigapixel sensor, co-adding the exposures to produce a deep, single high-resolution view . The field spans approximately 3 degrees across the sky .

Significance of the COSMOS Field

The COSMOS field serves two critical roles for astronomers:

• A "time machine" — Because looking deeper into space also means looking farther back in time, the image captures galaxies at many different stages of the universe's history, allowing scientists to study galaxy evolution across billions of years .
• A testing ground for LSST — Astronomers already know the field well from decades of Hubble and other observations, providing a perfect baseline to verify that Rubin delivers precise, high-quality measurements before the main survey begins .

Data Release Details

This image is part of Early Data Preview 2 (EDP2), the first Rubin data release based on the LSST Camera . EDP2 combines science validation observations collected between April 2025 and January 2026 and provides deep co-added images covering 3,000 square degrees of the night sky — roughly one-sixth of the entire visible Southern Hemisphere . The full Data Preview 2 (DP2) is targeted for October–December 2026, which will add individual visit images and difference images . EDP2 became available on July 27, 2026 .

Plans for Repeated Imaging

The COSMOS field is among the regions that Rubin will observe more frequently than most areas included in the Legacy Survey of Space and Time . Repeated visits over the coming years will demonstrate the survey's power for discovery by providing scientists with a huge number of transient and variable objects — such as supernovae and other explosive transients — for follow-up and detailed study . These additional observations will create an even deeper view, revealing fainter galaxies and finer details than seen in this first image .

Public Data Availability

EDP2 data is already available to the science community as of July 27, 2026 . Full LSST survey operations began in mid-2026, and data from the 10-year Legacy Survey of Space and Time will be released in annual data releases, with the first major Data Release (DR1) expected to follow the standard Rubin data policy of immediate public access after processing .