Shortly after the Big Bang, the early universe was an ultra-hot and dense soup of fundamental particles, including charged electrons and photons. In this environment, photons constantly bounced off the free electrons.

The Friedmann equation, derived from general relativity, governs the expansion of spacetime. However, it was found incompatible with observations, notably the universe’s accelerating expansion.

Our most successful cosmological model, Lambda Cold Dark Matter (ΛCDM), relies on the tenets set forth in the Cosmological Principle which states that at large scales, the universe is homogeneous and isotropic.

The cosmic web is among the largest structures in the universe, spanning a network of nodes interconnected by filaments.

Superclusters are among the largest known structures in the universe, consisting of groups of galaxy clusters.

One of the key questions in modern cosmology is determining the precise value of the Hubble parameter (H₀), which describes the linear relationship between an object's recession velocity and its distance.

It is not quite understood why we are able to observe supermassive black holes (SMBHs) early in our universe’s history. Leading theories can be separated into two camps.

Following the formation of baryonic matter just after the Big Bang, the universe entered a period known as the dark ages, where this matter drifted aimlessly through an otherwise empty cosmos.

In cosmology, the prevailing model that describes the universe is the Lambda Cold Dark Matter (ΛCDM) model.

Cosmological models are largely settled on the structure of the very early universe which, moments after the big bang, could be modelled as a smooth, homogeneous fluid.

Relic galaxies, a rare subset of galaxies, stand as cosmic anomalies, seemingly "frozen" in time.

The Atacama Large Millimeter Array (ALMA) continues to identify notable targets as a team of researchers present their discovery of a rather curious one.