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A faint glow from the early universe could help solve the mystery of dark energy
New astronomical detections of ancient hydrogen signals are opening unprecedented windows into cosmic history.
Dark Energy
26 trends tracked about this subject — the full history, oldest to newest below.
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'If I'm wrong, I can retire': Why some physicists are now betting big that dark energy doesn't exist
Some physicists are betting their careers on the bold hypothesis that dark energy might not actually exist.
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Hydrogen's distant glow opens new way to investigate dark energy
The CHIME telescope has detected an ancient hydrogen signal, providing a potential new method for scientists to investigate the mystery of dark energy.
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Biggest Supernova Dataset Yet Challenges Dark Energy Theory
A massive new supernova dataset challenges foundational theories of cosmic expansion and dark energy.
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Scientists Say the Universe Isn’t Slowing Down After All
2 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
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Scientists study 3,000 supernovas and discover that dark energy may be evolving
A comprehensive new dataset of nearly 3,000 exploding stars challenges decades of established cosmological theory.
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Dark energy debunked? Cosmic acceleration may be an illusion
New data from 3,000 supernovas suggests the universe's expansion may not be accelerating, potentially debunking the long-held theory of dark energy.
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Big supernova dataset challenges dark energy theory
A massive new catalog of 2,884 supernovae is challenging the established theory of dark energy and the nature of cosmic acceleration.
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Roman telescope leaves its rocket behind photo of the day for Aug. 31, 2026
NASA's Roman Space Telescope has successfully launched via SpaceX to begin its mission hunting for distant worlds and studying dark energy.
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Roman Space Telescope live launch updates: NASA, SpaceX begin post-launch press conference
NASA and SpaceX launched the Nancy Grace Roman Space Telescope, sparking massive media coverage and a surprise presidential call.
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NASA is about to launch a space telescope that could change how we see the universe
NASA is preparing to launch the Nancy Grace Roman Space Telescope via SpaceX to investigate dark energy and hunt for Earth-like exoplanets.
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Scientists Just Made A Serious Breakthrough. Now This Nobel Prize Winner Thinks We’ve Mapped The Universe All Wrong
Researchers at Yonsei University are challenging established cosmic models following a new paper on the acceleration of the universe.
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New NASA telescope to probe dark energy, dark matter and exoplanets
7 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
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Why NASA is adding the Nancy Grace Roman telescope to its fleet
NASA prepares to launch the Nancy Grace Roman Space Telescope, a mission designed to probe dark energy, dark matter, and distant exoplanets.
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The death of dark energy is a false alarm
4 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
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DESI releases biggest 2D map of the universe
15 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
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NASA's Nancy Grace Roman Space Telescope, launching on a Falcon Heavy on 30 August 2026, carries a mirror the size of Hubble's but sees a patch of sky about a hundred times wider, built mainly to map dark energy and hunt for planets
5 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
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How Fast Is the Universe Really Expanding?
New scientific discussions are challenging the existence of dark energy and examining how the universe expands faster than the speed of light.
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Does dark energy really exist? Our work identifies cracks in the foundations of today’s cosmological model
New cosmological research into dark energy and galaxy surveys is challenging the foundational models of the universe and Albert Einstein's theories.
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New quantum gravity theory links entropy, dark energy, and life
A new quantum gravity theory, known as Gravity from Entropy, seeks to reconcile the laws of gravity with the second law of thermodynamics.
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Dark energy flips its sign, but the Hubble tension refuses to budge
New astronomical data suggests dark energy may not be constant, though the persistent Hubble tension continues to challenge cosmic expansion models.
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Dark energy is still accelerating the expansion of the universe, and astronomers are relieved. 'Thankfully, we have averted this crisis'
8 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
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Yes, the universe's expansion is still accelerating, researchers say
Robust supernova data confirms the universe's expansion is accelerating, driven by dark energy.
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Collapsing stars could spawn mini-universes, offering new path to gravastars
New theoretical physics models suggest that collapsing stars may form internal mini-universes, potentially resulting in gravastars instead of black holes.
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Cosmic acceleration holds up as new analysis rebuts slowdown claim
Recent astronomical analysis rebuts a prior slowdown claim, confirming the universe's expansion remains fully in acceleration mode.
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Astronomers Push Back on a Challenge to How the Universe Will End
Astronomers have reaffirmed the theory of an accelerating universe, refuting recent mathematical challenges to the existence of dark energy.