APOD: 2026 September 18 – Messier 33: The Triangulum Galaxy
Image: NASA
Machine-written summary, checked against the sources below
NASA's Astronomy Picture of the Day for September 18, 2026 features Messier 33, the Triangulum Galaxy, presented as a daily image with accompanying explanation from a professional astronomer.
APOD Science APOD APOD: 2026 September 18 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Messier 33: The […]
Summary by NASA, the primary source