Cosmology is a research area in astrophysics that investigates the large-scale properties, origin, composition, and dynamical evolution of the Universe as a whole. It integrates general relativity, quantum field theory, and observational astronomy to construct and test models such as the ΛCDM paradigm, characterized by dark energy, cold dark matter, and baryonic matter. Cosmology addresses the expansion history, cosmic microwave background anisotropies, structure formation, and primordial nucleosynthesis, using data from galaxy surveys, gravitational lensing, supernovae, and cosmic background experiments to constrain fundamental parameters and probe physics at energy scales inaccessible to terrestrial laboratories.
Dark matter is an enigmatic form of matter not expected to emit light, yet it is essential to understanding how the rich tapestry of stars and galaxies we see in the night sky evolved. As a fundamental building block of the ...
Astronomy
Oct 9, 2025
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The Copernican Principle, named in honor of Nicolaus Copernicus (who proposed the heliocentric model of the universe), states that Earth and humans do not occupy a special or privileged place in the universe. In cosmological ...
Astrobiology
Oct 6, 2025
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For decades, astronomers have believed that dark matter and dark energy make up most of the universe. However, a new study suggests they might not exist at all. Instead, what we perceive as dark matter and dark energy could ...
Astronomy
Oct 1, 2025
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Nobel laureate Dr. George Smoot, who conducted groundbreaking research into the origins of the universe during a long career at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory, has died, ...
Astronomy
Oct 1, 2025
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For more than a century, physics has been built on two great theories. Einstein's general relativity explains gravity as the bending of space and time.
General Physics
Sep 24, 2025
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The consortium running the European Space Agency's (ESA) Euclid mission has published the most extensive simulation of the cosmos to date. The modeling was based on algorithms developed by UZH professor Joachim Stadel.
Astronomy
Sep 23, 2025
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An international research collaboration has used advanced computer simulations to investigate how faint radio signals from the early universe, soon to be observed from missions on the far side of the moon, could shed light ...
Astronomy
Sep 17, 2025
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Science is a story of coming up with theories then doing our best to disprove them. That is especially true for theories on a grand, cosmological scale, though disproving them can be particularly hard.
Astronomy
Sep 16, 2025
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Astronomers have discovered "dust-shrouded supermassive black holes" in the early universe, less than 1 billion years after the Big Bang—a type of object that had previously escaped detection.
Astronomy
Sep 9, 2025
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The magnetic fields that formed in the very early stages of the universe may have been billions of times weaker than a small fridge magnet, with strengths comparable to magnetism generated by neurons in the human brain. Yet, ...
Astronomy
Sep 2, 2025
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