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.
It's almost become expected that many space telescopes and probes can have "extended missions." Both Voyagers are still sending data back 40+ years after their five-year primary mission ended. But figuring out what to do ...
Astronomy
Nov 10, 2025
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Even though we can explore the universe with great precision, there is still a lot we don't know, according to Ulf Danielsson, professor of theoretical physics at Uppsala University. Besides doing research, he is keen to ...
Astronomy
Nov 4, 2025
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So much happened in the earliest moments of the universe. Elementary particles appeared, the first nuclei of hydrogen and helium, and fluctuations of energy and matter set into motion the formation of galaxies and supermassive ...
Astronomy
Oct 28, 2025
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An international team of researchers led by the Leibniz Institute for Astrophysics Potsdam (AIP) has shed light on a decades-long debate about why galaxies spin faster than expected—and whether this behavior is caused by ...
Astronomy
Oct 27, 2025
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Below the waves of the Mediterranean, Europe's KM3NeT neutrino telescope is on a cosmic hunt. Towering strings of sensors stretch a kilometer down to the seafloor, arranged in a vast 3D grid.
Astronomy
Oct 24, 2025
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Very early on in our universe, when it was a seething hot cauldron of energy, particles made of matter and antimatter bubbled into existence in equal proportions. For example, negatively charged electrons were created in ...
General Physics
Oct 22, 2025
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In 1867, Lord Kelvin imagined atoms as knots in the aether. The idea was soon disproven. Atoms turned out to be something else entirely. But his discarded vision may yet hold the key to why the universe exists.
General Physics
Oct 22, 2025
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The nature of dark matter remains one of the greatest mysteries in cosmology. Within the standard framework of non-collisional cold dark matter (CDM), various models are considered: WIMPs (Weakly Interacting Massive Particles, ...
General Physics
Oct 18, 2025
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Why is the universe expanding at an ever-increasing rate? This is one of the most exciting yet unresolved questions in modern physics. Because it cannot be fully answered using our current physical worldview, researchers ...
Astronomy
Oct 15, 2025
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Dark matter, the substance that makes up about 27% of the universe, could potentially be detected as a red or blue light "fingerprint," new research shows. The research is published in the journal Physics Letters B.
Astronomy
Oct 13, 2025
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