gravity

I would like to explain to someone about why the Sun's gravity does not pull the Earth into the Sun. I know that the reason that the Sun's gravity does not pull the Earth into the Sun is that the momentum of the Earth orbiting the Sun is in equilibrium with the Sun's gravity. What I need to... Read more

This work establishes the Spatial Pressure Gravitational Theory (SGT), an original, self-consistent, medium-dynamical theory of gravity, built rigorously from a foundational thought experiment—the Rubber Band Room—which motivates and anchors the entire theoretical framework. From this intuitive physical picture, we derive the nonlinear static field equation of SGT and provide six full mathematica…

This paper develops a structural account of invisible reality through the question of trace. It begins from the historical tension between Nikola Tesla and Albert Einstein. Tesla represents the demand for a carrier: every claim about invisible force must answer where the action is borne. Einstein represents the power of structure to carry prediction: gravity becomes answerable through spacetime c…

ABSTRACT For over 300 years, since Isaac Newton first described the force of gravity, the fundamental gravitational constant (G) has only ever been known as an approximate, measured value — roughly 6.67430 × 10⁻¹¹ m³ kg⁻¹ s⁻². No one has ever been able to derive it exactly from first principles, or explain where this number comes from. It has been called “The Shame of Physics” — the biggest missi…

This paper formally proposes the Spatial Pressure Medium Gravitational Theory (SGT), addressing the century-old ultimate question in physics: Why does gravity exist? Based on the uniform vacuum background medium—Spatial Pressure Medium (SPM)—the theory establishes a unified, self-consistent, and falsifiable dynamical framework. For the first time, it fully reveals the deep mechanisms of gravitati…

For more than 200 years, scientists have struggled to pin down the exact strength of gravity — and one physicist spent a decade chasing the answer while keeping his own results hidden from himself. Stephan Schlamminger and his team at NIST painstakingly recreated a landmark French experiment designed to measure “big G,” the universal gravitational constant that governs everything from falling app…

STEMgineer’s Guide to Problem Solving Workbooks What makes your feet stay on the ground? What keeps you from floating away into space? The answer is […] The post What is gravity? appeared first on STEM Education Works .

Hi What is the relationship between superconductors and gravity? Eugene podkletnov came up with some interesting findings. The first experiment centered on a spinning superconducting disk and the possibility of slight weight reduction above it .

Earth’s gravitational force, g, has been known for centuries. But the exact value of G, the universal gravitational constant, is elusive

Nature, Published online: 21 April 2026; doi:10.1038/d41586-026-01284-3 Physicists have spent the past decade trying to pin down the elusive fundamental constant, to no avail.

The present work develops a variational account of gravitational phenomena based on a closed quartic functional framework. Starting from a universal functional and its stationary condition, the admissible configuration space is constructed explicitly, together with the associated Hessian operator and its spectral structure. Within this framework, long-range interaction is not introduced as a fund…

Gravity is weaker than other fundamental forces because it spreads across extra dimensions and interacts universally with all mass-energy, diluting its strength. Unlike electromagnetism or nuclear forces, which act locally and strongly, gravity’s influence is cumulative but diffuse. Physicists suspect hidden dimensions or quantum effects may explain this imbalance, making gravity’s weakness one o…

Gravity is one of the great questions that classical science, based on the primacy of matter, has failed to resolve despite decades of countless efforts, just as it has failed to resolve the Three-Body Problem. This essay addresses how the impossibility of finding a general solution to these two key mysteries of Cosmology and Physics allows us, from the coherent framework of Informational Metaphy…

After a 10-year effort, physicists got a value for “Big G” that does not settle the debate over one of nature’s hardest numbers to nail down.

_Zenodo_. 2026This paper reclassifies the quantum gravity problem by exposing a directional error embedded in its very formulation. The phrase "quantum gravity" presupposes that gravity—like the other fundamental forces—should be quantized as an internal interaction. We demonstrate that this assumption conflates two operationally distinct roles: constraint (Type II) and generation (Type I). Gravi…

I have a conceptual question about surface gravity for non-spherical bodies. This is partly motivated by curiosity and science fiction, but I'm interested in the actual Newtonian physics. Consider a ...

Einstein taught us that gravity is not a force. But in a recently published paper, researchers claim that we might have had it wrong this whole time, arguing that gravity is a force after all. They say that when treated correctly as a force, gravity can more easily be made into a quantum theory. I’ve had a look.

It depends entirely on what you mean by knowledge. This figure (Credit:NASA/Conceptual Image Lab) shows magnetic field lines and the graded decrease of Earth’s gravity in an artistic rendition. We know how both of these work in considerable detail. Our theories for gravity and magnetism allow us to describe the essential physics of systems from … Continue reading Do we really know how gravity and…

Just over a week ago, European physicists announced they had measured the strength of gravity on the smallest scale ever. In a clever tabletop experiment, researchers at Leiden University in the Netherlands, the University of Southampton in the UK, and the Institute for Photonics and Nanotechnologies in Italy measured a force of around 30 attonewtons on a particle with just under half a milligram…

Gravity is a natural phenomenon by which all things with mass or energy are attracted to each other. Here are some important things you need to know about gravity. What is Gravity? Everything Thing You Need To Know About Gravity We all know the fact that Gravity is responsible for why objects attract to each other, why we stick to the surface of the earth and why planets orbit around the sun. The…