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.
If you're lucky, when you look up at the night sky, you'll see thousands and thousands of points of light. These lights each help tell the story of the universe—how it began, what worlds are out there now, and where new phenomena ...
Astronomy
Jun 4, 2025
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Physicists are always searching for new theories to improve our understanding of the universe and resolve big unanswered questions.
General Physics
Jun 4, 2025
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The origin of lithium (Li), the third element of the periodic table, has long been shrouded in mystery. This element, commonly found in cosmic rays as two stable isotopes, 6Li and 7Li, is crucial to understanding the origins ...
For the past decade, scientists have been trying to get to the bottom of what seemed like a major inconsistency in the universe. The universe expands over time, but how fast it's expanding has seemed to differ depending on ...
Astronomy
May 27, 2025
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Te Whare Wānanga o Waitaha | University of Canterbury (UC) second year Ph.D. scholarship student Sebenele (Sebe) Thwala, working with supervisors Dr. Chris Stevens and Prof Jörg Frauendiener, has been modeling how gravitational ...
Astronomy
May 21, 2025
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A study by Dartmouth researchers proposes a new theory about the origin of dark matter, the mysterious and invisible substance thought to give the universe its shape and structure. They say the hypothetical force shaping ...
General Physics
May 14, 2025
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The "afterglow" of the universe is an important piece of evidence for the Big Bang. This background radiation also provides important answers to the question of how the first galaxies were able to form. Researchers at the ...
Astronomy
May 9, 2025
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The largest sample of galaxy groups ever detected has been presented by a team of international astronomers using data from the James Webb Space Telescope (JWST) in an area of the sky called COSMOS Web. The study marks a ...
Astronomy
Apr 29, 2025
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The detection of dark matter, the elusive type of matter predicted to make up most of the universe's mass, is a long-standing goal in the field of astrophysics. As dark matter does not emit, reflect or absorb light, it cannot ...
A new study in Monthly Notices of the Royal Astronomical Society by researchers including István Szapudi of the University of Hawaiʻi at Mānoa Institute for Astronomy suggests the universe may rotate—just extremely slowly. ...
Astronomy
Apr 14, 2025
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