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.
The time had come to open the envelope, but Stephan Schlamminger, a physicist at the National Institute of Standards and Technology (NIST), wasn't sure he wanted to know the secret number that lay inside. For the past 10 ...
Astronomy
35 minutes ago
0
0
Gravity, as most people understand it, is the familiar force that pulls a falling apple toward Earth. But for astronomers and theoretical physicists, it is also a vexing invisible architect that guides the shape and evolution ...
General Physics
Apr 15, 2026
7
281
Astronomers at The University of New Mexico have published new research confirming three bodies orbiting the dynamic exoplanet system TOI-201. They include a super-Earth (TOI-201 d), a warm Jupiter (TOI-201 b), and a brown ...
Astronomy
Apr 15, 2026
0
69
The four astronauts embarking on NASA's lunar flyby became on Monday the humans to travel farthest from our planet, as they begin documenting areas of the moon never before seen by the naked eye.
Space Exploration
Apr 6, 2026
0
53
Four Artemis II astronauts are taking a giant step for humankind Monday when they shoot deeper into space than anyone before and glimpse parts of the moon never seen by the naked eye.
Space Exploration
Apr 6, 2026
0
24
The Artemis astronauts entered the final phase of their run-up to a lunar loop on Monday, a tipping point of sorts that means the moon's gravity is now having a stronger pull on the spacecraft than Earth's.
Space Exploration
Apr 6, 2026
0
66
As four astronauts whiz toward a flyby of the moon, looking out for them are mission control experts using cutting-edge technology and lessons learned from the Apollo program 50 years ago.
Space Exploration
Apr 4, 2026
0
24
The Artemis 2 astronauts have passed the halfway point between Earth and the moon on Saturday as they sped toward a planned lunar flyby, with NASA releasing initial images of Earth taken from inside the Orion spacecraft.
Space Exploration
Apr 4, 2026
0
98
Artemis 2 astronaut Jeremy Hansen felt like he was "falling out of the sky" as his spacecraft followed its complex flight path to the moon, the Canadian said in a Saturday video call.
Space Exploration
Apr 4, 2026
0
18
NASA's Artemis II astronauts fired their engines and blazed toward the moon Thursday night, breaking free of the chains that have trapped humanity in shallow laps around Earth in the decades since Apollo.
Space Exploration
Apr 3, 2026
0
51
