astrophysics

When astronomers tried to confirm a signal from the birth of the first stars after the Big Bang, they saw nothing.

In computer simulations of possible universes, researchers have discovered that a neural network can infer the amount of matter in a whole universe by studying just one of its galaxies.

Puzzling particles, quirky (and controversial) quantum computers, and one of the most ambitious science experiments in history marked the year’s milestones.

The James Webb Space Telescope has the potential to rewrite the history of the cosmos and reshape humanity’s position within it. But first, a lot of things have to work just right.

After a search of neutron stars finds preliminary evidence for hypothetical dark matter particles called axions, astrophysicists are devising new ways to spot them.

Brown dwarfs such as “The Accident” are illuminating the murky borderlands that separate planets from stars.

These ultrabright flashes have recently been tracked for days, upending ideas about the cataclysms that create them.

Scientists have long struggled to understand how common planets form. A new supercomputer simulation shows that the missing ingredient may be magnetism.

Groundbreaking results show that neutron stars of different masses may have the same size — upending astrophysical models.