Gravitation as a research area investigates the fundamental interaction responsible for the attraction between masses, spanning classical, relativistic, and quantum regimes. It encompasses the study of Newtonian gravity for weak-field, low-velocity systems, general relativity for strong-field and cosmological phenomena, and experimental and observational tests across scales from laboratory to astrophysical and cosmological. The field also includes gravitational wave physics, black hole and neutron star dynamics, precision tests of the equivalence principle, alternative and modified gravity theories, and efforts toward quantum gravity, such as loop quantum gravity, string-inspired models, and semiclassical approaches, with strong connections to cosmology and high-energy theory.
The power of gravity is writ large across our visible universe. It can be seen in the lock step of moons as they circle planets; in wandering comets pulled off-course by massive stars; and in the swirl of gigantic galaxies. ...
General Physics
Jan 23, 2024
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The expansion of the universe at some stage of evolution is well described by the Friedmann model. It was derived from general relativity a hundred years ago, but it is still considered one of the most important and relevant ...
General Physics
Jan 22, 2024
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The general theory of relativity is based on the concept of curved space–time. To describe how the energy and momentum of fields are distributed in space–time, as well as how they interact with the gravitational field, a ...
General Physics
Jan 18, 2024
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One of the greatest challenges of modern physics is to find a coherent method for describing phenomena, on the cosmic and microscale. For over a hundred years, to describe reality on a cosmic scale we have been using general ...
