An overview of our understanding of gravity at both the experimental and theoretical levels. It contains critical reviews on topics including astrophysics; cosmology; the status of gravitational wave sources and detectors; verification of Newton's law at short distances; and gravito-magnetism.

A comprehensive overview of our understanding of gravity at both the experimental and the theoretical level. Critical reviews by experts cover topics ranging from astrophysics (anisotropies in the cosmic microwave background, gamma ray bursts, neutron stars and astroparticles); cosmology; the status of gravitational wave sources and detectors; verification of Newton's law at short distances; the equivalence principle; gravito-magnetism; measurement theory; time machines and the foundations of Einstein's theory; and string theory and loop quantum gravity.

Sub-millimeter tests of the gravitational inverse square law, E. Adelberger
imaging the early universe with the boomerang experiment, P. De Bernardis
sources of gravitational waves, V. Ferrari
gravitational radiation - a tool for testing general relativity, C. Will
computational simulation of black hole collisions, R. Matzner
gravito-magnetism - theory and measurement, I. Ciufolini
recent developments in astro-particle physics, A. Riotto
three experimental paradoxes with a common Planck-scale interpretation, G. Amelino-Camelia
a string theorist's view of quantum gravity, G. Horowitz
non-perturbative quantum gravity - the state of the art, C. Rovelli
physics in the presence of a time machine, I. Novikov
space-time, general covariance, Dirac-Bergmann observables and non-inertial frames, L. Lusanna. (Part contents)