How does 47 Tucanae differ in appearance from Omega Centauri?

The primary difference in appearance between the two globular clusters lies in their central density. While Omega Centauri lacks a sharp nucleus and exhibits a noticeably elliptical shape, 47 Tucanae is characterized by a strong central concentration of stars.1

Although both are among the most luminous globular clusters in the Southern Hemisphere and are located at relatively similar distances from Earth—approximately 17,000 light-years for Omega Centauri and 14,700 light-years for 47 Tucanae—their structural profiles are distinct. The dense core of 47 Tucanae is so packed with stars that an observer situated at its center would experience a sky with the brightness of twilight on Earth.1