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Journal Article

Gravitational Physics

MPS-Authors
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Schutz,  Bernard F.
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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schutz_60228.pdf
(Any fulltext), 665KB

Schutz_pW9.pdf
(Any fulltext), 17MB

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Citation

Schäfer, G., & Schutz, B. F. (1996). Gravitational Physics. Physics World, 9(12), 25-30.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-7411-4
Abstract
Gravity is truly universal. It is the force that pulls us to the Earth, that keeps the planets and moons in their orbits, and that causes the tides on the Earth to ebb and flow. It even keeps the Sun shining. Yet on a laboratory scale gravity is extremely weak. The Coulomb force between two protons is 1039 times stronger than the gravitational force between them. Moreover, Newton's gravitational constant is the least accurately known of the fundamental constants: it has been measured to 1 part in 104, while Planck's constant, which characterizes quantum mechanics, is known to within 1 part in 106.