The accelerating universe as a research area investigates the observed late-time acceleration of cosmic expansion and its implications for fundamental physics and cosmology. It encompasses precise measurements of distance–redshift relations using Type Ia supernovae, baryon acoustic oscillations, and weak gravitational lensing, as well as constraints from cosmic microwave background anisotropies and large-scale structure growth. The field focuses on characterizing dark energy (e.g., cosmological constant, dynamical scalar fields, or modified gravity), determining its equation-of-state parameter and possible evolution, testing general relativity on cosmological scales, and developing theoretical frameworks and numerical simulations to reconcile observational data with models of cosmic expansion history.
Dark energy is a mystery so daunting that it stretches and strains our most robust theories. The universe is expanding, driven by the unknown force that we've named Dark Energy. Dark Energy is also accelerating the rate of ...
Astronomy
Mar 21, 2025
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The fate of the universe hinges on the balance between matter and dark energy: the fundamental ingredient that drives its accelerating expansion. New results from the Dark Energy Spectroscopic Instrument (DESI) collaboration ...
General Physics
Mar 20, 2025
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The Dark Energy Spectroscopic Instrument (DESI) is mapping millions of celestial objects to better understand dark energy—the mysterious driver of our universe's accelerating expansion. Today, the DESI collaboration released ...
Astronomy
Mar 20, 2025
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The universe has been expanding ever since the Big Bang almost 14 billion years ago, and astronomers believe a kind of invisible force called dark energy is making it accelerate faster.
Astronomy
Mar 20, 2025
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Dark energy makes up roughly 70% of the universe, yet we know nothing about it.
Astronomy
Mar 20, 2025
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Dark energy, the mysterious force thought to be driving the ever-faster expansion of the universe, appears to be changing over time, according to new observations released Wednesday.
Astronomy
Mar 20, 2025
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Scientists are homing in on the nature of a mysterious force called dark energy, and nothing short of the fate of the universe hangs in the balance.
Astronomy
Mar 20, 2025
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A new study using the Dark Energy Survey (DES) final datasets suggests potential inconsistencies in the standard cosmological model, known as ΛCDM. If confirmed, these findings could fundamentally alter our understanding ...
Astronomy
Mar 19, 2025
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Gravitational lensing often evokes images of a cosmic funhouse mirror: duplicated galaxies, dramatic arcs and distorted shapes. But the web-like, large-scale structure throughout the universe also bends light in a weaker, ...
Astronomy
Mar 13, 2025
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The universe is ballooning outward at an ever-faster clip under the power of an unknown force dubbed dark energy. One of the major goals for NASA's upcoming Nancy Grace Roman Space Telescope is to help astronomers gather ...
Astronomy
Mar 11, 2025
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