Messier 109 (M109), also known as NGC 3992, is a barred spiral galaxy located roughly 60 million light‑years away in the constellation Ursa Major. It spans about 120,000 light‑years in diameter and is the brightest member of the M109 galaxy group. Notable features include a distinct central bar, spiral arms, and three possible satellite galaxies.
Source: science.nasa.gov
27/06/2025