Einstein rings help scientists study dark matter and cosmic expansion. Euclid will find thousands more lenses to map the ...

A small blue dwarf galaxy passed through the massive Bullseye galaxy. This impact created nine rings of new stars.

NASA’s Hubble Space Telescope Discovers a Cosmic Bullseye, Found to Be a Galaxy With Star-Filled Rings Astronomers observed a unique image of a galactic collision between galaxies which created a ...

The Hubble Space Telescope has captured this striking image of an unusual galaxy with a bullseye structure, as nine rings ...

The structure is nearly 600 million light-years from Earth and is an early display of the nascent dark matter telescope's ...