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.
NSF–DOE Vera C. Rubin Observatory has officially begun full operations for the Legacy Survey of Space and Time (LSST), one of the world's largest astronomical imaging surveys. Behind the scenes, Japanese researchers and engineers ...
Astronomy
Jul 1, 2026
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Modern cosmology rests on a simple assumption: If we look on large enough scales, matter should be distributed evenly, with no preferred direction within the cosmos. This is known as the cosmological principle.
Astronomy
Jul 1, 2026
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Gravity, the force that attracts objects toward each other, is currently framed by Albert Einstein's theory of general relativity. This framework describes gravity as the curvature of spacetime, the invisible four-dimensional ...
Research led by the Tata Institute of Fundamental Research, Mumbai, along with Professor Subir Sarkar from the University of Oxford, questions the widely accepted argument that the expansion rate of the universe is accelerating ...
Astronomy
Jun 22, 2026
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Stars shine because atoms fuse in their interiors, releasing energy. When a very massive star has exhausted its nuclear fuel, radiation pressure can no longer provide sufficient counterforce to gravity. The star then collapses ...
General Physics
Jun 11, 2026
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Our universe's expansion is still accelerating despite recent claims suggesting otherwise, an international team of astrophysicists says.
Astronomy
Jun 10, 2026
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Mathematicians are challenging the idea that dark energy is responsible for the accelerating expansion of the universe. In a new paper published in Proceedings of the Royal Society A, mathematicians from the University of ...
Astronomy
May 28, 2026
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Cosmologists have long struggled to determine whether the universe's accelerating expansion is being driven by a simple cosmological constant, or whether dark energy's influence is evolving over time. In a new analysis published ...
An international team led by researchers at the Institute of Cosmos Sciences of the University of Barcelona (ICCUB) has developed a new method that could significantly improve our understanding of the expansion of the universe ...
Astronomy
May 6, 2026
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NASA's Nancy Grace Roman Space Telescope team now is targeting as soon as early September 2026 for launch, ahead of the agency's commitment to flight no later than May 2027.
Astronomy
Apr 22, 2026
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