AI‑Driven Survey Finds 70 New Cosmic Lenses

A global team of astronomers has reported the identification of 70 previously unseen gravitational lenses, a result enabled by the most comprehensive two‑dimensional map of the universe to date. These lenses—massive galaxies or clusters that warp and magnify the light of more distant objects—serve as natural telescopes for exploring the far‑reaching cosmos.

The achievement originates from the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys, which have assembled high‑resolution images covering roughly one‑third of the sky. Scientists applied advanced artificial‑intelligence routines to this vast collection, training them to pick out the faint arcs and rings that signal a lensing occurrence.

According to a collaboration member, the new approach proved highly efficient. “The combination of deep, uniform imaging and machine‑learning filters allowed us to sift through millions of galaxies in a fraction of the time traditional methods would require,” said a member of the collaboration.

Gravitational lenses are valuable assets in astrophysics because they amplify dim, remote galaxies, allowing investigations of early star formation, dark‑matter layout, and the universe’s expansion rate. Each newly confirmed lens enriches a growing roster that can be targeted for follow‑up work with space observatories such as the James Webb Space Telescope and ground‑based instruments equipped with adaptive optics.

The find also enlarges one of the biggest publicly accessible lens databases, which previously listed just over a hundred systems. By boosting the inventory by about 60 percent, the added lenses sharpen statistical tests of cosmological models and help tighten measurements of the Hubble constant.

Looking forward, the group intends to run the same AI pipeline on forthcoming surveys, including data from the Vera C. Rubin Observatory. With deeper and broader imaging on the way, astronomers expect the lens catalogue to keep expanding, sharpening our view of the universe’s most distant and mysterious epochs.