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expansion of the universe

NGC 5468 — the host galaxy of Cepheid. Joint photograph of the Webb and Hubble Space Telescopes, NASA/ESA

The Webb and Hubble telescopes confirm the rate of expansion of the universe, the puzzle remains

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Webb's measurements provide new light on a decade-long mystery known as the Hubble voltage - the differences in the age of the universe between the Hubble observations and past observations that remain unexplained * Prof. Adam Ries, winner of the Nobel Prize in Physics for the discovery of dark energy heads the project
An example of a supernova detected by the Dark Energy Survey within the field covered by one of the few detectors in the Dark Energy Camera. The supernova exploded in a spiral galaxy with redshift = 0.04528, which corresponds to a light travel time of about 0.6 billion years. For comparison, the quasar on the right has a redshift of 3.979 and a light travel time of 11.5 billion years. Credit DES Collaboration/NOIRLab/NSF/AURA/M.

The Dark Energy Survey publishes final results from the largest, in-depth and uniform sample of supernovae

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Among the observations of about two million distant galaxies, the researchers found several thousand supernovae, and this is the largest and deepest sample of supernovae ever obtained with a single telescope. The scientists then used advanced machine learning techniques to help classify the supernovae
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 galaxy GS-9209. credit g. brammer c. Williams A. carnall, University of Edinburgh

Webb revealed features of a galaxy 25 billion light years away

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The galaxy is currently 25 billion light-years away, but when light began to travel from it to us about 12.5 billion years ago, it was much closer, because the universe is expanding
An artist's impression of star formation in the early universe, a few hundred million years after the Big Bang. (Image credit: (Adolf Schaller/Space Telescope Science Institute, NASA)

It is possible that the universe will start contracting "really" soon

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In a new paper published in PNAS, three scientists attempt to model the nature of dark energy, a mysterious entity that appears to be causing the universe to expand faster and faster, consistent with previous observations of the universe's expansion.
V Representation of the evolution of the universe over 13.77 billion years. The far left shows the earliest moment we can study today, when a period of "inflation" created a burst of exponential growth in the universe. (The size is shown by the vertical proportion of the grid in this drawing). Over the next billion years the expansion of the universe gradually slowed down as the matter in the universe was pulled towards itself by gravity. Recently the expansion began to accelerate again as the repulsive effects of dark energy became dominant in the expansion of the universe. Credit: NASA's Goddard Space Flight Center

The Uneven Universe: The Expansion of the Universe and Einstein's Theory of General Relativity

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Cosmological calculations almost always assume that there is a uniform distribution of matter in the universe. This is because the calculations would be too complicated if they included the location of each and every star. In reality the universe is not uniform: there are places with stars and planets, and in other places there is only empty space.
expansion of the universe. Illustration: shutterstock

Dark energy: a map hints at what it is - but deepens the dispute over the expansion rate of the universe

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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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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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A spectacular view of the universe as seen in a Hubble Space Telescope image from 2014. NASA, ESA, H. Teplitz and M. Rafelski (IPAC/Caltech), A. Koekemoer (STScI), R. Windhorst (Arizona State University), and Z. Levay (STScI)

The rate of expansion of the universe is controversial - and we may need new physics to quantify it

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Dark energy is the name given by scientists to the phenomenon that causes acceleration in the expansion of the universe. There are three different hypotheses about the nature of dark energy: it may be a constant energy that arises from empty space itself (the hypothesis of the cosmological constant), or it may be a variable energy that originates from a fundamental field found in all of space. But it is also possible that dark energy does not exist at all and that the reason for the acceleration of the universe's expansion is that gravity behaves in a different way than our theories say when it comes to ranges on a cosmic scale. Illustration: Ævar Arnfjörð Bjarmason, Wikimedia.

The symmetron - the mysteries of dark energy

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Illustration of a neutron star and black hole merging. Credit: Dana Berry/NASA

Will gravitational waves be able to shed light on the expansion rate of the universe?

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The gravitational lensing of the galaxy LRG 3-757 imaged by the Hubble Space Telescope's Wide Field Camera #3. Photo: NASA/ESA / Hubble Space Telescope

Einstein's theory of relativity was also proven in a distant galaxy

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The dark energy puzzle, the mystery of why the expansion of the universe is accelerating, is a tough nut to crack. Photo: NASA and A. Riess (STScI), CC BY.

The dark energy puzzle

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The quasar HE0435-1223 in the center of the wide-field image is among the five best purified quasars discovered so far. The intervening galaxy creates four uniform images of the distant quasar around the true quasar. Credit: ESA/Hubble, NASA, Suyu et al.

New research reveals that the early universe expanded much faster than today

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The discovery image (changing stars in a nearby galaxy)

Is the universe expanding faster than we thought?

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Gravitational waves. Illustration: shutterstock

Have gravitational waves been found?

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"The Great Attractor" - Illustration: Perks Radio Observatory

The "Great Attractor" mystery has (probably) been solved - hundreds of galaxies hidden behind the Milky Way have been discovered

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Beatrice Tinsley at Yale University in 1977. Photo: Yale University

Beatrice Tinsley (Beatrice Tinsley) - researcher of the expanding universe

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On the map, which you can see above, the focal point from which the lines come out is at the point where the earth is located. To his right the older stars (red) around the center of the galaxy and to his left the younger stars (blue) in the outer parts of the disk. As the researchers in the group say, the Milky Way galaxy has grown outward over time.

Not just the entire universe: the Milky Way galaxy is expanding outward over time

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A model of the Hubble Space Telescope on the cargo deck of a space shuttle, as displayed at the Kennedy Space Center in Florida. Photo: shutterstock

The scientist who expanded the universe

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The sky in the microwave field, as photographed by the European Space Agency's Planck Space Telescope. These speckled structures of the cosmic background radiation, the oldest light in the universe, are visible at high latitudes on the map. The strip in the center is the plane of our galaxy - the Milky Way. Photo: European Space Agency.

Is a large concentration of dark energy at the beginning of the universe responsible for accelerating the expansion of the universe that began 7 billion years ago and is felt today?

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AMS Alpha Magnetic Spectrometer facility of the type installed on the International Space Station. From Wikipedia

Scientists: first evidence of the existence of dark matter has been discovered

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This map shows the ancient light in our universe, as it was discovered with the greatest precision yet by the Planck mission. Photo: European Space Agency and the Planck Partnership. Video

The universe is 100 million years older than we thought until now

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: Illustration of a giant black hole at the center of a distant galaxy adsorbing material from its immediate surroundings (courtesy of NASA).

Prof. Hagai Netzer from Tel Aviv University and scientists from China and France have developed a new method for measuring the acceleration of the expansion of the universe

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