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Astronomy Apr 8, 2025

Do 'completely dark' dark matter halos exist?

Every galaxy is thought to form at the center of a dark matter halo—a region of gravitationally bound matter that extends far beyond the visible boundaries of a galaxy. Stars are formed when gravity within dark matter halos ...

General Physics Apr 7, 2025

Quantum cosmology with final states can explain the accelerated expansion of the universe

Teleology is the idea that some processes in nature are directed toward a goal or an end. Today, it is commonly asserted that teleology is a remnant of antiquated ways of thinking about causation, and that it is not compatible ...

Astronomy Apr 3, 2025

Dark energy may not be constant—this discovery could undermine our entire model of cosmological history

The great Russian physicist and Nobel laureate Lev Landau once remarked that "cosmologists are often in error, but never in doubt." In studying the history of the universe itself, there is always a chance that we have got ...

Astronomy Apr 3, 2025

The significance of the recent 'baby pictures' showing the universe when it was just 380,000 years old

The Atacama Cosmology Telescope (ACT) collaboration, which includes researchers from the University of Toronto, recently produced the clearest images yet of the universe's infancy from the earliest cosmic time accessible ...

Astronomy Apr 1, 2025

KiDS dataset doesn't shake up cold dark matter model after all, say researchers

Data from 41 million galaxies does not shake up the standard cosmological model after all. To that conclusion, to their own surprise, comes an international team of researchers including Koen Kuijken, professor at the Leiden ...

Astronomy Mar 31, 2025

Dark matter could make planets spin faster

Dark matter is a confounding concept that teeters on the leading edges of cosmology and physics. We don't know what it is or how exactly it fits into our understanding of the universe. We only know that its unseen mass is ...

Astronomy Mar 26, 2025

Webb telescope sees galaxy in mysteriously clearing fog of early universe

Astronomers have identified a bright hydrogen emission from a galaxy in the very early universe. The surprise finding is challenging researchers to explain how this light could have pierced the thick fog of neutral hydrogen ...

Astronomy Mar 23, 2025

Bridging the gap between the cosmic microwave background and the first galaxies

One of the Holy Grails in cosmology is a look back at the earliest epochs of cosmic history. Unfortunately, the universe's first few hundred thousand years are shrouded in an impenetrable fog. So far, nobody's been able to ...

Astronomy Mar 23, 2025

Astronomers unveil 'baby pictures' of the first stars and galaxies

The clearest and most precise images yet of the universe in its infancy—the earliest cosmic time accessible to humans—have been produced by an international team of astronomers.

Astronomy Mar 22, 2025

Euclid opens data treasure trove, offers glimpse of deep fields

On 19 March 2025, the European Space Agency's Euclid mission releases its first batch of survey data, including a preview of its deep fields. Here, hundreds of thousands of galaxies in different shapes and sizes take center ...

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