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the universe

Conceptual diagram of this study. Signals from supernovae (close-up lower right), quasars (close-up middle left), and gamma-ray bursts (close-up top center) reach Earth in the Milky Way galaxy (background), where we can use them to measure cosmological parameters. Credit: NAOJ

Rewriting the past and future of the universe - new research sheds light on the fate of our cosmos

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New research has improved the accuracy of the parameters that control the expansion of the universe. More precise parameters will help astronomers determine how the universe grew to its current state, and how it will evolve in the future.

The beginning of the universe in the eyes of science

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A special article in honor of Hebrew new year summarizing the creation of the world through the lens of science
On July 1, 2023, the Euclid spacecraft was successfully launched aboard Space-X's Falcon 9 rocket. Its purpose is to explore the mysterious components of the universe, dark matter and dark energy. Credit: Credit: SpaceX

The "Dark Universe" space telescope Euclid is launched on a mission to reveal the deepest mysteries of the cosmos

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The "Dark Universe" Euclid space telescope is launched on a mission to uncover the deepest mysteries of the cosmos
Hawking radiation from a black hole. Illustration: depositphotos.com

Everything in the universe is doomed to evaporate - Hawking's radiation theory is not limited to black holes

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A team of researchers confirmed Hawking's prediction of evaporating black holes, but extended its application to all large objects in the universe
The distribution of dark matter in a segment of the southern sky. Based on data from the ACT observatory in Chile that operated between 2007-2022. Courtesy of Princeton University and the University of Pennsylvania

A new map of dark matter verifies Einstein's theory of general relativity

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A groundbreaking new map of dark matter has been created using data from the Dark Energy Survey (DES), in an international collaboration of astronomers and physicists. The map shows the distribution of dark matter in the southern sky region, and is the most accurate and detailed map of its kind ever created
A two-dimensional projection of the cosmic web as obtained from a supercomputer simulation. Credit: Dr. Ewald Puchwein and the Sherwood-Relics collaboration

New research suggests that dark matter may be made of dark photons

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The new hypothetical particles may be able to explain the observations made by the Cosmic Source Spectrograph on the Hubble Space Telescope
The cosmic background radiation in the microwave field. Photo: NASA

We tested Einstein's theory of gravity on the scale of the universe - here's what we found

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Researchers who have examined whether Einstein's theory of gravity works on the largest possible scale claim that there are deviations that need to be checked and corrected similar to those at small distances that can be answered using quantum theory
The galaxy cluster Abell 520, with parts suspected of being dark matter highlighted in blue. NASA

Dark matter: Should we be so sure it exists? This is how philosophy can help

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It's been more than 50 years since astronomers first proposed "dark matter," which is thought to be the most common form of matter in the universe. Even so, we have no idea what dark matter is. No one has seen dark matter directly or produced it in a lab. But are there competing theories that explain the same data better?
The COBE satellite was developed by NASA's Goddard Space Flight Center to measure the dispersion of infrared and cosmic radiation from the early universe to the limits set by our astrophysical environment. Credit: Matthew Verdolivo, UC, Davis

An invisible parallel "mirror universe" may be the reason for the disagreements about the mourning constant

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According to new research, an invisible "mirror universe" of particles that interacts with our world only through gravity could be the key to solving a major mystery in cosmology today - the Hubble constant problem
Multiverse - parallel universes. From Wikipedia

What is the Hemolyteverse?

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Following the new Marvel movie "Doctor Strange in the Dimensions of Madness" which takes place in the Multiverse, I decided to break down in a short article the meaning of parallel universes and the reasons to believe in their existence. In my opinion, science surpasses any imagination, including Marvel's imagination.

A breakthrough for an alternative model for dark matter

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Researchers from Prague published in the prestigious journal Physical Review Letters an alternative model for dark matter based on MOND that succeeds in predicting the existence of the cosmic background radiation. This is a significant achievement that the MOND model has so far failed to explain, and for this it has received most of the criticism against it. the price? Two new fields in Teva. The authors of the article hope in the future to prove its existence with the help of the model's unique fingerprints on the gravitational waves.
Quasar. . Illustration: depositphotos.com

Some of the missing matter of the universe has been found thanks to the Very Large Telescope

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The scientists thus discovered some of the missing baryons of the universe, and confirmed that 80-90% of the normal matter is found outside galaxies, an observation that will help to expand the models of galaxy development.
The galaxy M87. Artist illustration. shutterstock

New research: Why is dark matter - the main component of matter in the universe - absent in some galaxies?

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An artist's illustration depicting a spiral galaxy in deep space (this image is for illustration only, and does not depict any galaxy). Photo: depositphotos.com

Commendation from the Foundation for Gravity Research to Prof. Asher Yehalum from Ariel who offers an alternative to dark matter

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Prof. Yaholum explained why the rotation speed of the matter in the galaxies does not decrease as you move away from the center of the galaxy starting from the outskirts, but remains the same or even increases * It is estimated that dark matter is involved in the process. According to Prof. Yahlom and his colleagues, these phenomena can be explained according to a theory known as the theory of delay - the amount of time it takes for the effect of an event in the center of the galaxy to spread to its edges.
An atom of a radioactive element. Image: depositphotos.com

Discovery of radioactive plutonium from cosmic dust deposited on Earth confirms theories of the formation of the elements

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Traces of the radioactive plutonium were found in a deep-sea mineral in the Pacific Ocean, which is a millions-year-old archive of material from the Earth but also of cosmic dust that settles on it
The galaxy cluster RXCJ0600-2007 imaged by the NASA/ESA Hubble Space Telescope, combined with gravitational lensing images of the distant galaxy RXCJ0600-z6, 12.4 billion light-years away, observed by ALMA (shown in red). Due to the gravitational lensing effect of the galaxy cluster, the image of RXCJ0600-z6 has been intensified and magnified, appearing to be divided into three or more parts. Credit: ALMA (ESO/NAOJ/NRAO), Fujimoto et al., NASA/ESA Hubble Space Telescope

Infant galaxy in the early universe discovered with the help of a "cosmic telescope"

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wormhole Photo: depositphotos.com

Researchers from Germany: dark matter and the problem of hierarchy explained with the help of a fifth dimension

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Researchers around the world are looking for an explanation for the mystery of dark matter and the problem of hierarchy. The two problems seem completely different, but according to researchers from Johns Gutenberg University in Germany, both can be solved with the help of a compact fifth dimension. The estimated model does not contradict the experimental data discovered in current accelerators and predicts a new particle with a mass of 30TeV that may be discovered in future accelerators
An image of about ten thousand galaxies is called: "Hubble's vast deep field". The image includes galaxies of a variety of ages, sizes, shapes and colors. About 800 of the small red galaxies may be the most distant galaxies to be seen. They were created when the universe was 13 million years old. The nearest galaxies - the luminosities with a distinct spiral or ellipse shape - are about a billion light-years away, when the universe was 800 billion years old. The image required 400 exposures taken during Hubble's 11.3 orbits around the Earth. The total exposure time was 24 days, between September 2003, 16 and January 2004, XNUMX. Photo: NASA, ESA, and S. Beckwith (STScI) and the HUDF Team

Measure the heat of the dark matter

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Maps of filaments of matter filling the universe. The gas wires are shown in blue. The background maps are an optical image taken by the Subaru Telescope (left) and a millimeter wavelength image taken by the ALMA observatory (right). Existence of extensive gaseous structures and cosmic web wires discovered (left); and that the filaments connect several galaxies where there is a high rate of star formation (right). Credit: RIKEN

Massive filaments of matter filling the universe are responsible for the growth of galaxies and the supermassive black holes at their centers

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We observe the universe and it looks the same in all directions. From the Nobel Prize website

"Nobel winner Jim Peebles led theoretical research in cosmology for decades"

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Nobel Prize winners in physics James Peebles, Michel Mayor and Didia Kello. Illustration: Nobel Prize Committee

The discoverers of the first planet outside the solar system and the key to the cosmological theory were jointly awarded the Nobel Prize in Physics

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An artist's illustration of a kilonova caused by a neutron star merger. Image: CREDIT: NAOJ

The origin of the heavy elements - in the fusion of neutron stars

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From the Big Bang to today - Wilkinson Space Observatory. Photo: NASA

Understanding and controlling the molecule that created our universe

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A laser beam that travels 1,600 km in a tube. LIGO detector | Photo: NASA

"With the LIGO upgrade we will be able to discover dozens of gravitational wave events per year"

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The entire universe is located on the edge of this expanding bubble. Credit: Suvendu Giri, Uppsala University

A new theory: the universe rides on top of an expanding bubble from another dimension

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