Astronomers See a 'Dirty' Star Explosion for the First Time
Massive stars end their lives in a colossal explosion, which Fritz Zwicky called a supernova. The core crushes down into a black hole or a neutron star.
A Cosmic Sketch Without Smudges: JWST Confirms Cold Dark Matter
In the 1930s, Fritz Zwicky first noticed that galaxies in clusters were moving too fast — something invisible was holding them. Later, Vera Rubin measured the rotation of spiral galaxies, confirming that space is permeated by dark matter.
Winds of Cosmic Noon: How Quasar WISSH13 Halts Star Formation
Nearly 12 billion years ago, when the Universe was experiencing the turbulent 'cosmic noon'—the era of record-breaking star formation — at the heart of one galaxy, the quasar WISSH13 was flaring up.