Category archives: Astrophysics

Unveiling dark matter: How the Dragon Arc’s twinkling stars challenge cosmic theories

Unveiling dark matter: How the Dragon Arc’s twinkling stars challenge cosmic theories

AstronomyAstrophysicsDIPC Astrophysics

By DIPC

The mystery of dark matter remains one of the most profound puzzles in modern astrophysics. We know it outweighs ordinary matter by a factor of five, yet it neither shines nor absorbs light. Its presence is betrayed only by the pull of gravity, shaping galaxies and bending light from more distant objects. For decades, scientists […]

Numerical relativity and the biggest questions about the Universe

Numerical relativity and the biggest questions about the Universe

AstrophysicsCosmology

By Mapping Ignorance

We’re often told it is “unscientific” or “meaningless” to ask what happened before the Big Bang. But a new paper by cosmologist Eugene Lim, of King’s College London, UK, and astrophysicists Katy Clough, of Queen Mary University of London, UK, and Josu Aurrekoetxea, at Oxford University, UK, proposes a way forward: using complex computer simulations […]

Unlocking the universe’s hidden light: The COCOA Telescope

Unlocking the universe’s hidden light: The COCOA Telescope

AstrophysicsDIPC AstrophysicsDIPC Particle PhysicsParticle physics

By DIPC

Deep in the heart of exploding stars and colliding neutron stars lies a hidden light we’ve barely glimpsed — gamma rays in the mega-electron-volt (MeV) range. These elusive rays, carrying clues about cosmic explosions and mysterious phenomena like dark matter, have been hard to study due to technological limits. Enter COCOA , a compact, innovative […]

What happens when you feed a neural network with millions of synthetic black hole data sets

What happens when you feed a neural network with millions of synthetic black hole data sets

AstrophysicsComputer science

By Mapping Ignorance

A team of astronomers led by Michael Janssen (Radboud University, The Netherlands) has trained a neural network with millions of synthetic black hole data sets. Based on the network and data from the Event Horizon Telescope, they now predict, among other things, that the black hole at the centre of our Milky Way is spinning […]

What if the universe rotates?

What if the universe rotates?

AstrophysicsCosmology

By Mapping Ignorance

A new study suggests the universe may rotate—just extremely slowly. The finding could help solve one of astronomy’s biggest puzzles. Current models say the universe expands evenly in all directions, with no sign of rotation. This idea fits most of what astronomers observe. But it doesn’t explain the so-called Hubble tension—a long-standing disagreement between two […]

Direct imaging of a cosmic filament connecting two quasar-host galaxies

Direct imaging of a cosmic filament connecting two quasar-host galaxies

AstrophysicsDIPC Astrophysics

By DIPC

In the vast expanse of the universe, galaxies are not isolated islands but are interconnected through a vast network known as the “cosmic web.” This intricate structure, composed of dark matter and gas, forms the backbone of the cosmos, guiding the formation and evolution of galaxies. Recent advancements have allowed astronomers to capture a high-definition […]

The surprising diversity of exploding white dwarfs

The surprising diversity of exploding white dwarfs

Astrophysics

By Mapping Ignorance

For decades, Type Ia supernovae have played a pivotal role in the discovery and study of dark energy—the mysterious force responsible for the accelerating expansion of the Universe. To do so, cosmologists compare two quantities: the redshift, i.e., the photon’s wavelength stretch caused by the geometrical expansion of the Universe ; and the Supernovae brightness […]

Does the universe really behave the same way everywhere?

Does the universe really behave the same way everywhere?

AstrophysicsCosmologyPhysics

By César Tomé

A new study presents a methodology to test the assumption of cosmic homogeneity and isotropy, known as the Cosmological Principle, by leveraging weak gravitational lensing—a light distortion effect described by general relativity—in astronomical images collected by new observatories such as the Euclid Space Telescope. Finding evidence of anomalies in the Cosmological Principle could have profound […]