For astronomers studying dark matter, the Bullet Cluster is one of the greatest laboratories in the universe. Follow-up ...

Take gravitational lensing, for instance. I remember the first time I saw those distorted images of galaxies; I thought the ...

A swarm of galaxies called the Bullet Cluster is the biggest, best natural laboratory for studying dark matter that ...

Astronomers have successfully charted a colossal cluster of galaxies, extending billions of light years. This unprecedented exploration into cosmic structures could provide new insights into the ...

Take gravitational lensing, for example. I remember the first time I saw those distorted galaxy images; I thought the photo ...