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Astronomy Sep 26, 2024

The universe is smoother than the standard model of cosmology suggests. So is the theory broken?

Given how unfathomably large the universe is, it is perhaps understandable that we haven't yet cracked all its secrets. But there are actually some pretty basic features, ones we used to think we could explain, that cosmologists ...

Astronomy Sep 26, 2024

Scientists create model of holographic dark energy that is no longer unstable

In 1998, scientists discovered that our universe expands with acceleration, and in order to explain this effect, the concept of dark matter was introduced. This is a special type of energy that fills up all of existing space-time ...

Astronomy Sep 23, 2024

Quantized redshift and challenges to Big Bang hypothesis

A Doppler shift is defined as a change of frequency of light or sound when an object is moving toward or away from an observer. Edwin Hubble observed in 1929 that galaxies appear on average to be moving away from us (see ...

Astronomy Sep 18, 2024

Magnifying deep space through the 'Carousel Lens'—rare alignment offers unique opportunity to study cosmology

In a rare and extraordinary discovery, researchers have identified a unique configuration of galaxies that form the most exquisitely aligned gravitational lens found to date. The Carousel Lens is a massive cluster-scale gravitational ...

Astronomy Sep 18, 2024

Future gravitational wave observatories could see the earliest black hole mergers in the universe

In February 2016, scientists at the Laser Interferometer Gravitational-wave Observatory (LIGO) confirmed they made the first-ever detection of gravitational waves (GWs). These events occur when massive objects like neutron ...

Astronomy Sep 15, 2024

Cosmology is at a tipping point—we may be on the verge of discovering new physics

For the past few years, a series of controversies have rocked the well-established field of cosmology. In a nutshell, the predictions of the standard model of the universe appear to be at odds with some recent observations.

Astronomy Sep 13, 2024

Early dark energy could resolve cosmology's two biggest puzzles

A new study by MIT physicists proposes that a mysterious force known as early dark energy could solve two of the biggest puzzles in cosmology and fill in some major gaps in our understanding of how the early universe evolved.

Astronomy Sep 12, 2024

Do we live in a shell universe?

The universe might not be as you think. Until recently, the Lambda Cold Dark Matter model seemed to have a lock on cosmology. Like earlier Big Bang models, it supposes that the universe expanded from a hyperdense state and ...

General Physics Sep 5, 2024

First detection of cross-correlation between cosmic shear and X-ray background enhances baryonic matter understanding

A new study in Physical Review Letters offers the first detection of the cross-correlation between cosmic shear and diffuse X-ray background, helping to understand the distribution of baryonic matter in the universe.

General Physics Sep 4, 2024

Bridging quantum mechanics and cosmology: The role of the generalized uncertainty principle

In a continuous pursuit to understand the fundamental laws that govern the universe, researchers have ventured deep into the realms of string theory, loop quantum gravity, and quantum geometry. These advanced theoretical ...

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