本书以"旅行"的方式，在太阳系从内到外，依次"到达"水星、金星、地球、火星、小行星带、木星、土星、天王星、海王星、冥王星、开伯带和奥尔特云，看到的都是极具特色的"景点"。或从远处眺望，或在近旁欣赏，太阳系天体最精彩之处尽收眼底。遨游之后，读者将会对太阳系有整体性的、概括性的了解，对各类天体的独特风貌有直观的认识。
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