The mourning constant

Hubble voltage. Illustration: NSF Noir Lab

Extremely precise measurement of the expansion rate of the universe strengthens the “Hubble tension”

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An international collaboration has once again found that the local universe is expanding faster than the standard cosmological model predicts, possibly hinting at new physics.
Graphics: N. BURGESS/SCIENCE; Data: NASA; Satellite Image: STEVEN RODNEY/UNIVERSITY OF SOUTH CAROLINA; GABRIEL BRAMMER/COSMIC DAWN CENTER/NIELS BOHR INSTITUTE/UNIVERSITY OF COPENHAGEN; Image Processing: JOSEPH DEPASQUALE/STSCI

Cosmic illusions may decide the debate over the rate of expansion of the universe

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An expected reappearance of the supernova SN Requiem, seen repeatedly due to gravitational lensing, may provide a third way to measure the Hubble constant.
Astronomers have discovered an unusual gravitationally stimulated supernova whose light traveled more than 10 billion years to reach Earth. Illustration: depositphotos.com

Rare Excited Supernova May Help Decipher the Rate of Expansion of the Universe

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The event SN 2025wny, seen through gravitational lensing after a journey of more than ten billion years, may provide a new measurement of the Hubble constant and contribute to the understanding of dark energy.
The galaxy cluster PLCK G165.7+67.0 and SN H0pe as imaged by the NIRCam instrument on the Webb Space Telescope. Credit: NASA, ESA, CSA, STScI, Brenda Frey (University of Arizona), Roger Windhorst (ASU), S. Cohen (ASU), Jordan CJ D'Silva (UWA), Anton M. Cuckmore (STScI), Jake Summers (ASU)

The Webb Space Telescope discovered a supernova that updates the Hubble constant - the expansion rate of the universe

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The discovery of SN H0pe, a distant supernova that was observed in three replicates using gravitational insolation, allowed researchers to accurately measure the Hubble constant at different times, revealing insights into the expansion rate of the universe
The image shows the barred spiral galaxy NGC 1559 as seen by the James B. Space Telescope. The galaxy contains a clear central region with a distinctive open pattern in the loose spiral arms. NGC 1559 is about 35 million light-years away in the little-observed southern constellation, the Reticulum. Credit: ESA/Webb, NASA & CSA, A. Leroy, J. Lee and the PHANGS team.

The light of knowledge: a new look at the grief into the southern group of the hunting net

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The Hubble Space Telescope photograph of NGC 1559 shows the active star formation regions of the galaxy using special light filters
This image of NGC 5468, a galaxy about 130 million light-years from Earth, combines data from the Hubble and James Webb space telescopes. It is the most distant galaxy in which Hubble has detected variable Cepheid stars. These stars serve as important landmarks for measuring the expansion rate of the universe.

The Webb and Hubble space telescopes confirm the universe's expansion rate, the puzzle continues

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Web sightings provide new insights into a decade-long mystery
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 stress - the differences in the age of the universe between the Hubble observations and past observations that remain unexplained * Prof. Adam Rees, winner
Galaxies that are pulled into a giant galaxy cluster. When entering the group, these galaxies show a blue shift compared to the central galaxy. Credit: Dr. Shihong Liu

"Challenges of the age of the universe: Galactic dance reveals that the universe may be younger than thought

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Motions of satellite galaxies around groups and clusters of giant galaxies could provide valuable insights into their evolution. The observations of such motion provide crucial clues about the age of 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.
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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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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Cosmic scene with DNA, stars, solvents and atomic circles in oral flow.

The universe does not expand uniformly

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