First Images from JWST’s Largest General Observer Program

March 9, 2023 • by Staff Writer

Mosaic images from the COSMOS-Web program offer a treasure trove of early galaxies.

A field of stars

The first epoch of COSMOS-Web observations obtained with the NIRCam instrument on Jan. 5-6, 2023. Image credit: COSMOS-Web/Kartaltepe, Casey, Franco, Larson, et al./RIT/UT Austin/CANDIDE.


A montage of four galaxies from the early universe

Images of four example galaxies selected from the first epoch of COSMOS-Web NIRCam observations, highlighting the range of structures that can be seen. In the upper left is a barred spiral galaxy; in the upper right is an example of a gravitational lens, where the mass of the central galaxy is causing the light from a distant galaxy to be stretched into arcs; on the lower left is nearby galaxy displaying shells of material, suggesting it merged with another galaxy in its past; on the lower right is a barred spiral galaxy with several clumps of active star formation. Image credit: COSMOS-Web/Kartaltepe, Casey, Franco, Larson, et al./RIT/UT Austin/CANDIDE.

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