Astronomers Baffled by 'Almost Invisible' Dwarf Galaxy Challenging Dark Matter Theory

Astronomers have discovered an "almost invisible" dwarf galaxy named Nube, which challenges our current understanding of the cosmos. Nube is extremely diffuse, emitting barely any light and is 10 times fainter and wider than expected. Its unusual properties cannot be explained by dark matter, leading to speculation about the particles that make up dark matter having an extremely small mass. This discovery could potentially unify the world of the smallest with that of the largest, and researchers are now searching for similar faint galaxies to further unravel the mystery.