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Top 6 physics News Today

#1
Earth has a tail, flowing for millions of kilometres into space on its dark side
#1 out of 6562.0 est. views81.82%
4h ago

Earth has a tail, flowing for millions of kilometres into space on its dark side

https://www.wionews.com/trending/earth-has-a-tail-flowing-for-millions-of-kilometres-into-space-on-its-dark-side-1765431481520
Wionews.com
  • Earth hosts a magnetotail formed by the interaction of its magnetosphere with the solar wind, extending behind the planet on the night side.
  • NASA explains that the magnetosphere traps plasma and shapes a tail as solar wind returns plasma away from Earth.
  • The tail may extend to about two million kilometres behind Earth, though exact length is uncertain.
  • Mercury's tail forms from sodium and solar radiation pressure when near the Sun, a comparison to Earth's magnetotail.
  • 3I/ATLAS, an interstellar visitor, also exhibits tail features discussed alongside Earth’s tail in the article.
  • European Space Agency comments on the uncertain length of Earth’s magnetotail, guiding the estimate.
  • NASA’s description connects magnetotail dynamics to the solar wind’s influence on Earth's space environment.
  • The article links the tail phenomenon to related space events and objects, such as 3I/ATLAS and interstellar topics.
  • The piece emphasizes that multiple celestial bodies can display tails under different conditions.
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#2
99.9999999% Certainty: Astronomers Confirm a Discovery with Far-Reaching Consequences for the Universe's Fate
#2 out of 6
1d ago

99.9999999% Certainty: Astronomers Confirm a Discovery with Far-Reaching Consequences for the Universe's Fate

https://dailygalaxy.com/2025/12/supernova-age-bias-hubble-measurement-update/
Dailygalaxy.com
  • New study links host-galaxy age to Type Ia supernova brightness, challenging standard candles.
  • Correcting the age bias could remove evidence for an accelerating cosmic expansion.
  • Findings align with a dynamic dark energy model rather than a constant one.
  • DES observations also show tension with the ΛCDM model, supporting the reassessment.
  • Future surveys like LSST and Euclid could test whether dark energy evolves over time.
  • The study analyzes more than 300 SN Ia host galaxies to identify the trend.
  • Younger galaxies tend to host dimmer supernovae after standardization, biasing distances.
  • The work could explain part of the Hubble tension between CMB and distance-ladder methods.
  • Isolating supernovae in galaxies of uniform age is essential for robust cosmology tests.
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#3
Temporal anti-parity–time symmetry in diffusive transport - Nature Physics
#3 out of 6
1d ago

Temporal anti-parity–time symmetry in diffusive transport - Nature Physics

https://www.nature.com/articles/s41567-025-03129-8
Nature.com
  • Temporal anti-PT symmetry is used to actively shape diffusion dynamics in real time.
  • Dynamic control of material properties enables programmable heat transport history.
  • Experiment shows heat can move with, against, or be trapped by convection.
  • Temporal APT symmetry extends non-Hermitian physics into the time domain.
  • The study demonstrates robust transport control under parameter jitter and boundary changes.
  • The research provides a framework for programmable energy transport in metamaterials.
  • The work includes experimental demonstrations of heat trapping and cooling applications.
  • Researchers show backward heat evolution is tunable by temporal control.
  • Temporal APT symmetry enables precise localization of heat peaks.
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#4
Observation of deuteron and antideuteron formation from resonance-decay nucleons - Nature
#4 out of 6
1d ago

Observation of deuteron and antideuteron formation from resonance-decay nucleons - Nature

https://www.nature.com/articles/s41586-025-09775-5
Nature.com
  • ALICE analyzes π±–d correlations in pp collisions to study deuteron formation mechanisms.
  • Researchers find that deuteron formation proceeds after Δ resonance decays rather than direct emission.
  • Approximately 88.9% of (anti)deuterons originate from resonance binding, per the analysis.
  • A true fraction around 69% is estimated after correcting for pion efficiency and acceptance.
  • Δ resonance shapes are extracted from π–p correlations to model π–d spectra.
  • The study uses the CATS framework to model interactions in the π–d system.
  • Measured Δ peak shifts to lower mass values due to rescattering effects.
  • EPOS 3 and ThermalFIST are used to compare resonance production with data.
  • The analysis covers high-multiplicity pp collisions at 13 TeV, focusing on Δ contributions to deuteron yields.
  • The researchers quantify the resonance fraction and discuss implications for cosmic ray modelling.
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#5
Is the universe ending sooner than we thought? New physics suggests a much shorter lifespan | - The Times of India
#5 out of 6
13h ago

Is the universe ending sooner than we thought? New physics suggests a much shorter lifespan | - The Times of India

https://timesofindia.indiatimes.com/science/is-the-universe-ending-sooner-than-we-thought-new-physics-suggests-a-much-shorter-lifespan/articleshow/125905402.cms
Timesofindia.indiatimes.com
  • Latest research from Radboud University proposes a Hawking-like evaporation affecting all dense objects, not just black holes.
  • The new model lowers the universe’s end time from 10¹¹⁰⁰ years to roughly 10⁷⁸ years, a vast but finite timescale.
  • The concept hinges on spacetime curvature around massive objects influencing evaporation rates.
  • White dwarfs and neutron stars could eventually evaporate, contributing to the final fade of luminous matter in the universe.
  • The study clarifies that the revised timeline does not imply observable changes to daily life or humanity's future.
  • The research integrates astrophysics, mathematics, and quantum physics to explore extreme cosmological scenarios.
  • Impactful findings come from revisiting Hawking radiation beyond event horizons, applying to curved spacetime around massive bodies.
  • Even with a shorter timeline, the universe remains beyond practical human comprehension in terms of timescales.
  • The article notes that this is about deep-time cosmology, not an immediate threat to daily life.
  • Experts emphasize that the end of the universe will occur after the last luminous matter evaporates.
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#6
No sterile neutrinos after all, say MicroBooNE physicists
#6 out of 6
5h ago

No sterile neutrinos after all, say MicroBooNE physicists

https://arstechnica.com/science/2025/12/microboone-results-rule-out-sterile-neutrinos/
Arstechnica.com
  • MicroBooNE finds no evidence of sterile neutrinos, confirming a null result for this hypothesis.
  • The latest paper confirms there are no oscillations into a sterile neutrino in MicroBooNE data.
  • Fermilab’s search now shifts to alternative explanations and new experiments for the earlier anomalies.
  • The Deep Underground Neutrino Experiment (DUNE) is under construction to study high-energy neutrinos.
  • MicroBooNE’s size enabled precise measurements, aiding future large-scale detectors like DUNE.
  • MicroBooNE used a liquid-argon time projection chamber to analyze neutrino interactions.
  • MicroBooNE’s five-year data set (2015–2021) underpins the null result for sterile neutrinos.
  • The findings guide ongoing and future neutrino research within the SBN program and DUNE.
  • The Nature paper detailing MicroBooNE’s results is published with DOI 10.1038/s41586-025-09757-7.
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