An "Einstein cross" is a fascinating phenomenon that resembles a flower with four petals. That is what we call the "Einstein Cross." They are not mere decorative patterns but rather a distant galaxy concealed behind the prominent orange galaxy at the center of the frame. Interestingly, the Einstein Cross isn't exclusively formed by galaxies lurking behind other cosmic entities. But why the name "Einstein Cross"?

Source: dna September 16, 2023 18:19 UTC