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Category: cosmology

BREAKING: A Dark Mysterious Force Just Ripped Across the Milky Way

A viral post claimed that a mysterious force passed through the Milky Way without light or warning. But what are astronomers actually observing? In this video, we break down the real science behind high-velocity gas clouds, dark matter halos, and how our galaxy continues to evolve.

Chapters:
00:00 Introduction.
00:51 DISCOVERY
03:05 SCIENTIFIC IMPORTANCE & THEORIES
05:32 IMPLICATIONS & WHAT’S NEXT
08:15 Outro.
08:39 Enjoy.

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Finally Released! The James Webb Telescope Has Found The Object That Holds Our Universe Together

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Finally Released! The James Webb Telescope Has Found The Object That Holds Our Universe Together.

Containing nearly 800,000 galaxies, this image from NASA’s James Webb Space Telescope is overlaid with a map of dark matter, represented in blue. Researchers used Webb data to find the invisible substance via its gravitational influence on regular matter.

You see, Scientists using data from NASA’s James Webb Space Telescope have made one of the most detailed, high-resolution maps of dark matter ever produced. It shows how the invisible, ghostly material overlaps and intertwines with “regular” matter, the stuff that makes up stars, galaxies, and everything we can see.

Published Monday, Jan. 26, in Nature Astronomy, the map builds on previous research to provide additional confirmation and new details about how dark matter has shaped the universe on the largest scales — galaxy clusters millions of light-years across — that ultimately give rise to galaxies, stars, and planets like Earth.

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Comments on the Hartle-Hawking state and observers — Ying Zhao

Workshop on quantum aspects of black holes and spacetime.

Topic: Comments on the Hartle-Hawking state and observers.
Speaker: Ying Zhao.
Affiliation: Massachusetts Institute of Technology.
Date: December 3, 2025
Wolfensohn Hall.

It was argued that any fixed holographic theory contains only one closed universe state and hence fails to give semi-classical physics. It was proposed that this problem can be resolved by including a classical observer living inside the universe. Earlier works focused on closed universes connected with asymptotic Euclidean boundaries. In this talk we examine the case of Hartle-Hawking state where the dominant Euclidean topology is a sphere. We show that different features emerge. We comment on the potential implications for the understanding of de Sitter space. Based on work with Daniel Harlow.

UNBELIEVABLE! JWST Just Found the Earliest Supernova in History

Astronomers using the James Webb Space Telescope have confirmed the earliest supernova ever observed, linked to the gamma-ray burst GRB 250314A. The explosion occurred when the universe was just 730 million years old and looks surprisingly similar to modern supernovae, offering new insight into how the first massive stars lived and died.

Paperlink : https://arxiv.org/abs/2507.

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Hubble spotted a ‘dark galaxy’ that’s at least 99.9% dark matter

Using the Hubble Space Telescope in combination with other observatories, astronomers identified an unusually dim galaxy, known as candidate dark galaxy-2, that appears to be almost entirely dominated by dark matter.

Search through space telescope’s archival images reveals unusually dim galaxy.

Physicists develop new method to measure universe’s expansion rate

We have known for several decades that the universe is expanding. Scientists use multiple techniques to measure the present-day expansion rate of the universe, known as the Hubble constant. These methods are internally consistent and based on the same physics, so all observed values of the Hubble constant should agree. But those that come from early-universe datasets disagree with those that come from late-universe datasets. This problem is known as the Hubble tension and is considered to be one of the most significant open questions in cosmology.

Now a team of astrophysicists, cosmologists, and physicists at The Grainger College of Engineering at the University of Illinois Urbana-Champaign and at the University of Chicago has developed a novel way to compute the Hubble constant using gravitational waves—tiny ripples in the spacetime fabric. The researchers were able to improve upon the accuracy of prior gravitational-wave methods of measuring the Hubble constant. As our capability to observe gravitational waves improves in the future, this new method can be used to make even more accurate measurements of the Hubble constant, bringing scientists closer to resolving the Hubble tension.

Illinois Physics Professor Nicolás Yunes said, “This result is very significant—it’s important to obtain an independent measurement of the Hubble constant to resolve the current Hubble tension. Our method is an innovative way to enhance the accuracy of Hubble constant inferences using gravitational waves.” Yunes is the founding director of the Illinois Center for Advanced Studies of the Universe (ICASU) on the Urbana campus.

Astronomers Witness Unprecedented Cosmic Explosion Linked to a “Missing” Black Hole

The Truth About Wormholes: Einstein’s “Bridge” May Rewrite Time Itself

A newly detected X-ray transient may reveal the first direct evidence of an intermediate-mass black hole consuming a white dwarf.

A newly observed cosmic outburst is giving astronomers a rare glimpse into some of the most extreme processes in the universe.

On July 2, 2025, the China-led Einstein Probe (EP) space telescope identified an extraordinarily bright X-ray source while conducting a routine survey of the sky. What immediately caught scientists’ attention was how rapidly the object’s brightness changed. Its unusual behavior distinguished it from typical high-energy sources and prompted observatories around the world to begin immediate follow-up observations.

One of the biggest stars in the universe might be getting ready to explode

One of the largest known stars in the universe underwent a dramatic transformation in 2014, new research shows, and may be preparing to explode. A study led by Gonzalo Muñoz-Sanchez at the National Observatory of Athens, published in Nature Astronomy today, argues that the enormous star WOH G64 has transitioned from a red supergiant to a rare yellow hypergiant—in what may be evidence of an impending supernova.

The evidence suggests we may be witnessing, in real time, a massive star shedding its outer layers, shrinking as it heats up, and moving closer to the end of its short life.

Scientists Simulated The Big Bang’s Aftermath, And Found The Universe Was Like Soup

Immediately after the Big Bang boomed, the Universe was a trillion-degree ‘soup’ of unimaginably dense plasma. In a breakthrough experiment, researchers have found the first evidence that this exotic primordial goo did actually slosh and swirl like soup.

In slightly more scientific terms, this gooey soup is called quark-gluon plasma, or QGP. It was the first and hottest liquid ever to exist. Predictions suggest it blazed a billion times hotter than the surface of the Sun for a few millionths of a second before it expanded, cooled, and coalesced into atoms.

As detailed in a recent study, a team of physicists from MIT and CERN recreated heavy-ion collisions like those that created the QGP to explore its properties. For example, when a quark flows through the plasma, does it recoil and splash like a cohesive liquid, or does it scatter randomly like a collection of particles?

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