Euclid space telescope observations of ancient globular cluster NGC 6397 reveal a subtle gap in brightness distribution of red dwarf stars.

Glittering star cluster image reveals missing patch of stars: 'We were not looking for the gap, but we found it'

Source: space
Source Link: https://www.space.com/astronomy/stars/glittering-star-cluster-image-reveals-missing-patch-of-stars-we-were-not-looking-for-the-gap-but-we-found-it