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James Webb Reveals Secrets of Milky Way's Star Factory

9/24/2025

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Summary

Story summary

Sagittarius B2 is the Milky Way’s most active star-forming site, forming about 0.04 solar masses per year.
University of Florida astronomers used the James Webb Space Telescope (JWST) to study Sagittarius B2; findings published September 15.
JWST uncovered hidden massive stars and new candidate H II regions, and the cloud shows eastern-part star formation.

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Story summary

Sagittarius B2 is the Milky Way’s most active star-forming site, forming about 0.04 solar masses per year.
University of Florida astronomers used the James Webb Space Telescope (JWST) to study Sagittarius B2; findings published September 15.
JWST uncovered hidden massive stars and new candidate H II regions, and the cloud shows eastern-part star formation.