A thorough and up-to-date description of the sun, planets, moons, asteroids, and comets in our solar system. Coverage is non-mathematical, and is presented as a "travelogue" of the solar neighborhood. Discussion is based heavily on results obtained from recent space probes to Mercury, Venus, Mars, Jupiter, Saturn, and Uranus. Offers detailed descriptions of the moons of Jupiter and Saturn, and the results of the recent probes of Halley's comet. An extensive discussion of meteorites leads to a description of the current models of the solar system. Introductory chapters present theories of the solar system from the ancient Greeks to the present day. Other topics covered include the sun, its structure, and how it generates energy; the surfaces, internal structures, and histories of the planets, from innermost Mercury to farthest Pluto, and their moons.