Retired Galaxies in the Young Universe
In the first few hundred million years after the Big Bang, the cosmos was like a noisy teen club: galaxies flared up, collided, and churned out stars by the hundreds.
The Mystery of 'Impossible' Galaxies: How Outer Color Maps Are Rescuing Cosmology
The first two billion years after the Big Bang were an era when the universe resembled a boiling construction pit. Dark matter clumped the gas together, igniting the first stars. It seemed there simply wasn't enough time to assemble massive elliptical galaxies—'dormant' stellar metropolises — from this raw material.
Flash in a Lens: Supernova on the Galaxy's Edge
In the dense galaxy cluster Abell 2744, where gravity bends light like a lens, the James Webb Space Telescope spotted a new point of light. It appeared in images from 2023 and then began to change brightness. It was a supernova, the explosion of a dying star, but not just any kind: a Type IIP.