An Einstein ring is an example of strong gravitational lensing,” explained study lead Conor O’Riordan of the Max Planck Institute for Astrophysics in Germany. “All strong lenses are special, because they’re so rare, and they’re incredibly useful scientifically. This one is particularly special because it’s so close to Earth and the alignment makes it very beautiful.”
I would never pretend I can even remotely wrap my head around this, but anything that helps us understand how gravity works seems like a scientific gold mine.