Astronomers Measure Full Size of Largest Known Galaxy

Deepest Images Reveal Galaxy's Edge Astronomers have successfully measured the full extent of IC 1101, the largest known galaxy, using the deepest images ever captured. These observations allowed the team to identify the galaxy's outer boundary, a milestone that had eluded scientists for decades.

A Galactic Giant The study confirms that IC 1101 spans roughly 520 kiloparsecs, equivalent to about 1.7 million light-years. It contains an estimated 3.4 trillion solar masses in stars, placing it far above typical galaxies.

New Findings Published The research, based on a paper posted to arXiv, provides the first definitive measurement of the galaxy's overall size. The findings solidify IC 1101's position at the top of the list of known galaxies.

Implications for Galaxy Formation Understanding the true size of IC 1101 offers new clues about how massive galaxies form and evolve. The observations push the limits of what current telescopes can resolve.