When astronomers split the light of nine ancient galaxies through the James Webb Space Telescope's spectrograph, they found a population of small, faint stars that no prior instrument could detect. Th

Emission from photoionised gas surrounding young stellar populations ($H\text{II}$ regions) provides critical diagnostics of the physical conditions in star forming galaxies. This emission constrains ...

The James Webb Space Telescope observed Terzan 5, a region at the galactic center, confirming it to be a "bulge fossil fragment," challenging previous classifications of globular clusters and shedding

Astronomers have directly measured a supermassive black hole from just 700 million years after the Big Bang. It is two-thirds as massive as the entire galaxy surrounding it — which means the black hol

Astronomers using the James Webb Space Telescope found a surprising non-rotating galaxy from the early universe, challenging existing galaxy formation theories.

We present a sample of six F200W and three F277W dropout sources identified as 16 < z < 25 galaxy candidates using the deepest JWST/NIRCam data to date (5σ depths ∼31.5 mag at ≥2 μm), provided by the MIRI Deep Imaging Survey and the Next Generation Deep Extragalactic Explor

La découverte de galaxies dépourvues de matière noire invite à revoir en profondeur les modèles de formation de ces structures essentielles de l’Univers.

Cosmic voids affect galaxy formation and gravitational waves. Learn how empty space shapes cosmic structure and help us better understand the universe

The existence of massive, elliptical galaxies in the early universe has puzzled astronomers for two decades. An international team led by Nikolaus Sulzenauer and Axel Weiß from the Max Planck Institute for Radio Astronomy (MPIfR) used data from the Atacama Large Millimeter/submillimeter Array (ALMA) to shed light on this open question of galaxy formation. They studied one of the most spectacular galaxy aggregations in great detail and published their results in the current issue of The Astrophysical Journal.

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The chemistry of a galaxy changes over time as generations of stars live and die, spreading the results of their nucleosynthesis out into space. But stars with different masses produce different elements,...

Find out more about the open access textbook Fundamentals of Dark Matter from its author, Ignacio Ferreras.

Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics

The early Universe continues to spring surprises on astronomers. In a recent study of dim, distant objects, astronomers at the University of Missouri found at least 300 of them that look way too bright....

What if the universe’s invisible scaffolding holds the key to every galaxy you’ve ever seen—yet remains utterly ghostly? We embark on a cosmic detective story where dark matter halos weave the very fabric of galaxy formation and evolution. From initial density perturbations and gas cooling in protogalaxies, to the cosmic architecture created through hierarchical clustering in the ΛCDM model, this podcast dives into how invisible forces fashion the visible cosmos. We break down the influence of active galactic nuclei (AGN) on shaping galactic growth, explore how cosmic microwave background (CMB) ripples and gravitational lensing act as our invisibility detectors for dark matter, and reveal the secrets hidden in galaxy diversity—from spirals to massive clusters. With a dash of wit and wonder, we turn astrophysics—from simulations of galaxy formation to the statistical fingerprints of cosmic structure—into an awe-inspiring story that’s both thrilling and deeply relatable. If you felt your mind expand just a bit, share this cosmic journey with your stargazing friends, subscribe for more mystery-meets-science episodes, and leave a review—because together, we're turning dark matter from invisible into unforgettable.