Gravitational interaction as a research area encompasses the theoretical, computational, and experimental study of how mass-energy curves spacetime and governs the dynamics of astrophysical and cosmological systems. It includes general relativity, tests of the equivalence principle, post-Newtonian approximations, and numerical relativity for compact-object binaries and gravitational-wave sources. The field also investigates modifications of gravity, dark matter and dark energy phenomenology from a gravitational perspective, strong- and weak-field regimes, gravitational lensing, and structure formation. Research involves precision experiments, multi-messenger astronomy, and the development of effective field theories and quantum-gravity–motivated models to probe deviations from classical gravitational dynamics.
In 1994, Miguel Alcubierre was able to construct a valid solution to the equations of general relativity that enable a warp drive. But now we need to tackle the rest of relativity: How do we arrange matter and energy to make ...
Space Exploration
Mar 24, 2025
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In the realm of science fiction, Dyson spheres and ringworlds have been staples for decades. But it is well known that the simplest designs are unstable against gravitational forces and would thus be torn apart. Now a scientist ...
The puzzle of predicting how three gravitationally bound bodies move in space has challenged mathematicians for centuries, and has most recently been popularized in the novel and television show "3 Body Problem." There's ...
Astronomy
Mar 4, 2025
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Southwest Research Institute (SwRI) scientists are studying Saturn's moon Titan to assess its tidal dissipation rate, the energy lost as it orbits the ringed planet with its massive gravitational force. Understanding tidal ...
Planetary Sciences
Feb 12, 2025
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Hot Jupiters are giant planets initially known to orbit alone close to their star. During their migration towards their star, these planets were thought to accrete or eject any other planets present. However, this paradigm ...
Planetary Sciences
Jan 15, 2025
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Billions of years ago, in the frigid outer reaches of our solar system, two icy worlds collided. Rather than destroying each other in a cosmic catastrophe, they spun together like a celestial snowman, finally separating while ...
Planetary Sciences
Jan 6, 2025
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After its formation, the moon may have been the scene of such immense volcanic activity that its entire crust melted several times and was completely churned through. At that time, the moon orbited significantly closer to ...
Planetary Sciences
Dec 18, 2024
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The Earth and moon have been locked in a gravitational dance for billions of years. Each day, as the Earth turns, the moon tugs upon the oceans of the world, causing the rise and fall of tides. As a result, the Earth's day ...
Planetary Sciences
Dec 12, 2024
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On Dec. 12, at 11:15 p.m. EST, NASA's Lucy spacecraft, currently in a two-year orbit around the sun, will skim Earth's atmosphere, passing only about 220 miles (360 kilometers) above the surface. This close flyby will result ...
Space Exploration
Dec 12, 2024
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The orbits of the planets around the sun have been the source for many a scientific debate. Their current orbital properties are well understood but the planetary orbits have evolved and changed since the formation of the ...
Astronomy
Dec 11, 2024
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