dark energy

Nobel laureate defends accelerating universe theory against growing challenges

A quarter-century-old pillar of modern cosmology — that the universe's expansion is accelerating, driven by a mysterious "dark energy" — is facing renewed scrutiny from multiple research groups whose reanalyses of supernova data suggest the evidence may not be as…

New supernova studies cast doubt on dark energy theory

Two new analyses published this month are raising fresh questions about one of modern cosmology's foundational ideas: that a mysterious force called dark energy is driving the universe's expansion to accelerate. The studies arrive amid a broader period of uncertainty…

Largest supernova catalog hints dark energy may not be constant

The largest catalog of exploding white dwarf stars ever assembled is pushing scientists to reconsider what they think they know about dark energy, the mysterious force behind the universe's accelerating expansion.

Scientists release largest-ever 2D map of the universe

The DESI Legacy Imaging Surveys team has released the largest 2D color map of the universe ever assembled — a 5.6-trillion-pixel mosaic cataloguing nearly 4 billion celestial objects. Released on August 10 by the U.S. Department of Energy's Lawrence Berkeley…

Study reaffirms universe’s expansion is accelerating

The expansion of the universe is still accelerating, according to a new study that rebuts claims made late last year suggesting the cosmos had entered a phase of deceleration. The paper, published on June 11 in the Monthly Notices of…