Astronomers have found a rare heart‑shaped structure in space created when two galaxies collide. The 'romantic' heart is ...

Looking ahead: Future Euclid observations will enable scientists to watch how galaxy collisions spark bursts of star formation, fuel shrouded black holes, and unleash energetic feedback. According to ...

Supermassive black holes rarely travel alone. Most large galaxies hide one at the center, and when galaxies collide, the two central black holes can end up bound together. Astronomers have seen plenty ...

The first time I heard about galaxies without dark matter, I was sitting in my very first graduate class at the University of São Paulo. It was 2018, and the discovery had just been announced. A team ...

Dark matter, the invisible matter that holds the galaxies together, is entirely missing in a galaxy, a new study has shown. The study, led by Michael Keim and Pieter van Dokkum at Yale University, has ...

Whether or not galaxies merge depends on how strong the gravitational attraction is between the galaxies and whether the universe’s expansion is more powerful than gravity. Gravity affects everything ...