COSMOS Photometric Redshift Catalog: 2 Million Galaxies Over 75% of Universe Age

Over 2 million galaxies are detected in this astronomical survey covering a 2 square degree equatorial field. The COSMOS survey was designed to probe galaxy formation and evolution using imaging from major space-based and ground-based telescopes. The catalog is provided by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Train photometric redshift estimation models based on multi-wavelength telescope imaging.
• Study galaxy formation and evolution as a function of cosmic time based on the survey's stated purpose.
• Analyze the relationship between galaxies and large-scale structural environment based on the survey's design.
• Conduct cosmological research using a dataset spanning 75% of the age of the universe.

Strengths

• Over 2 million galaxies detected, providing a large sample for analysis.
• Data spans 75% of the age of the universe, offering broad temporal coverage.
• Imaging incorporates data from multiple major space-based and ground-based telescopes, suggesting multi-wavelength coverage.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• File formats include BIN and HTML, which may require specialized tools for access and analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Imaging survey from space-based (Hubble, Spitzer, GALEX, XMM, Chandra) and ground-based telescopes (Subaru, VLA, ESO-VLT, UKIRT, NOAO, CFHT, and others).

Time Range

Spans 75% of the age of the universe.

Freshness

Last updated 2026-03-13 19:57:25.907688; freshness should be verified.

Geography

Covers a 2 square degree equatorial field.