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ScienceQuiet 10d · day 17

Supernova catalog suggests dark energy is not constant, changing over time

Analysis of 3,000 type Ia supernovas challenges the standard cosmological model that treats dark energy as fixed.

newest coverage 10d agosummary written 13d ago12 pieces Google NewsNewswires

What to know

  • Analysis of 3,000 type Ia supernovas—cosmic explosions with uniform brightness used as 'standard candles'—suggests dark energy is evolving rather than constant as standard cosmology assumes.
  • The research integrates 30 years of observations with data from the Dark Energy Survey, Big Bang relics, and galaxy maps into one consistent framework, providing the strongest constraints yet on dark energy's behavior.
  • Results align with 2024 findings from DESI suggesting dark energy's influence may be weakening, potentially signaling a shift in how the universe accelerates its expansion.

“A catalog of almost 3,000 white dwarfs that exploded as type Ia supernovas after overfeeding on companion stars indicates that dark energy, the mysterious force accelerating the expansion of the universe, is changing over time.”

Space.com, Science publication · Space.com ↗

Ryan Camilleri Research team member, University of QueenslandDark Energy Survey (DES) Data sourceDark Energy Spectroscopic Instrument (DESI) Prior research

Supernova catalog suggests dark energy is not constant, changing over time
Space.com

How it unfolded 2 developments, newest first · click a bar or a number to jump articles

Peak 4 pieces in 4h at Sep 10, 11 AM; 12 pieces over 17 days (12 articles) Sep 7, 3 PM — 2 pieces · 2 articles — Google News 2Sep 7, 7 PM — quietSep 7, 11 PM — quietSep 8, 3 AM — 2 pieces · 2 articles — Google News 2Sep 8, 7 AM — 1 piece · 1 article — Google News 1Sep 8, 11 AM — quietSep 8, 3 PM — quietSep 8, 7 PM — quietSep 8, 11 PM — quietSep 9, 3 AM — quietSep 9, 7 AM — quietSep 9, 11 AM — quietSep 9, 3 PM — quietSep 9, 7 PM — quietSep 9, 11 PM — quietSep 10, 3 AM — quietSep 10, 7 AM — quietSep 10, 11 AM — 4 pieces · 4 articles — Google News 3, Newswires 1Sep 10, 3 PM — quietSep 10, 7 PM — quietSep 10, 11 PM — quietSep 11, 3 AM — quietSep 11, 7 AM — quietSep 11, 11 AM — quietSep 11, 3 PM — quietSep 11, 7 PM — quietSep 11, 11 PM — quietSep 12, 3 AM — quietSep 12, 7 AM — quietSep 12, 11 AM — quietSep 12, 3 PM — quietSep 12, 7 PM — 2 pieces · 2 articles — Google News 2Sep 12, 11 PM — quietSep 13, 3 AM — quietSep 13, 7 AM — quietSep 13, 11 AM — quietSep 13, 3 PM — quietSep 13, 7 PM — quietSep 13, 11 PM — quietSep 14, 3 AM — 1 piece · 1 article — Google News 1Sep 14, 7 AM — quietSep 14, 11 AM — quietSep 14, 3 PM — quietSep 14, 7 PM — quietSep 14, 11 PM — quietSep 15, 3 AM — quietSep 15, 7 AM — quietSep 15, 11 AM — quietSep 15, 3 PM — quietSep 15, 7 PM — quietSep 15, 11 PM — quietSep 16, 3 AM — quietSep 16, 7 AM — quietSep 16, 11 AM — quietSep 16, 3 PM — quietSep 16, 7 PM — quietSep 16, 11 PM — quietSep 17, 3 AM — quietSep 17, 7 AM — quietSep 17, 11 AM — quietSep 17, 3 PM — quietSep 17, 7 PM — quietSep 17, 11 PM — quietSep 18, 3 AM — quietSep 18, 7 AM — quietSep 18, 11 AM — quietSep 18, 3 PM — quietSep 18, 7 PM — quietSep 18, 11 PM — quietSep 19, 3 AM — quietSep 19, 7 AM — quietSep 19, 11 AM — quietSep 19, 3 PM — quietSep 19, 7 PM — quietSep 19, 11 PM — quietSep 20, 3 AM — quietSep 20, 7 AM — quietSep 20, 11 AM — quietSep 20, 3 PM — quietSep 20, 7 PM — quietSep 20, 11 PM — quietSep 21, 3 AM — quietSep 21, 7 AM — quietSep 21, 11 AM — quietSep 21, 3 PM — quietSep 21, 7 PM — quietSep 21, 11 PM — quietSep 22, 3 AM — quietSep 22, 7 AM — quietSep 22, 11 AM — quietSep 22, 3 PM — quietSep 22, 7 PM — quietSep 22, 11 PM — quietYesterday, 3 AM — quietYesterday, 7 AM — quietYesterday, 11 AM — quietYesterday, 3 PM — quietYesterday, 7 PM — quietYesterday, 11 PM — quietToday, 3 AM — quietToday, 7 AM — quietToday, 11 AM — quiet 12
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  1. 2

    Unified supernova catalog combined with multiple cosmic datasets

    The research team integrated 30 decades of astronomical observations into a single framework, merging the supernova catalog with data from the Dark Energy Survey, Big Bang relics, and galaxy distribution maps to produce the most comprehensive constraints on dark energy evolution.

    “We've rebuilt 3 decades of astronomical observations into a single, consistent framework… Instead of confirming the standard model of cosmology, which assumes dark energy is fixed and unchanging, we have more evidence that dark energy may change over time.”
    — Ryan Camilleri
    1. 1 outlet Most extensive catalog of supernovae challenges dark energy theory

      first by Universe Space Tech, 14d ago

    2. 1 outlet Unified Supernova Catalog Delivers Sharpest Dark Energy Constraints on Record

      first by techtimes.com, 14d ago

  2. 2 days quiet
  3. 1

    Supernova dataset analysis reveals dark energy may not be constant

    Researchers analyzing a catalog of almost 3,000 type Ia supernovas found evidence suggesting dark energy, the force accelerating cosmic expansion, is changing over time rather than remaining fixed as standard cosmology assumes.

    1. 4 outlets Scientists study 3,000 supernovas and discover that dark energy may be evolving

      first by space.com, 14d ago · also NewsBytes, Universe Today, Buttondown

      3 more headlines

    2. 3 outlets first by Xinhua, 16d ago · also The National Tribune, Mirage News · read ↗

    1 more claim →