The expanding universe research area investigates the observational and theoretical foundations of cosmic expansion, originating from general relativity and supported by redshift–distance relations, cosmic microwave background anisotropies, and large-scale structure surveys. It encompasses measurements of the Hubble parameter and its evolution, constraints on dark energy and matter content via cosmological parameters, and tests of the ΛCDM model and its alternatives. Research integrates numerical simulations, precision cosmology, and data from supernovae, baryon acoustic oscillations, and gravitational lensing to characterize the expansion history, probe deviations from general relativity, and refine models of early- and late-time cosmic dynamics.
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
0
180
The universe has a hidden structure, and a University of Virginia professor is mapping it in 3D, using 46 million galaxies and quasars and 19 million stars. Satya Gontcho A Gontcho, an assistant professor in the Department ...
Astronomy
Apr 21, 2026
0
42
With the launch of Space Warps, a new citizen science project on the Zooniverse platform, you can now join in the search to find rare and elusive strong gravitational lenses in never-before-seen images captured by the European ...
Astronomy
Apr 21, 2026
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19
The Dark Energy Spectroscopic Instrument (DESI) has successfully completed the largest high-resolution 3D map of the universe ever made, a major milestone in understanding the force driving cosmic expansion. The milestone ...
Astronomy
Apr 18, 2026
6
199
For the last five years, the Dark Energy Spectroscopic Instrument (DESI) has been systematically scanning the night sky. Today marks the completion of its first map, which is the largest high-resolution 3D map of the universe ...
Astronomy
Apr 15, 2026
0
118
New research suggests that relic black holes from before the big bang may still shape galaxies today. These black holes could explain dark matter, one of the biggest unsolved questions in cosmology.
Astronomy
Apr 14, 2026
6
268
Drawing together leading experts from across the field, an international collaboration of cosmologists has created a unified approach for measuring the value of the Hubble constant. Published in Astronomy & Astrophysics, ...
Douglas Adams told us the answer to life, the universe and everything is 42. If only cosmology were so straightforward. Astronomers have been arguing for years about a number every bit as fundamental, and they still can't ...
Astronomy
Mar 30, 2026
1
254
Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that analyzes the motion of two nearby galaxy groups within their surrounding cosmic flow. The results ...
Astronomy
Mar 11, 2026
4
125
Researchers from the University of Bologna and the Leibniz Institute for Astrophysics Potsdam (AIP) along with other institutes have proposed a new way to address the Hubble tension by comparing estimates of the universe's ...
Astronomy
Mar 5, 2026
93
273
