Models of planetary formation can be tested by comparison of their ability to predict features of our Solar System in a consistent way, and then extrapolated to other hypothetical planetary systems by different choice of parameters. When this is done, it is found that the resulting systems are insensitive to direct effects of the mass of the star, but do strongly depend on the properties of the disk, principally its surface density. Major uncertainty results from lack of an adequate theoretical model that predicts the existence, size, and distribution of analogs of our Solar System, particularly the gas giants Jupiter and Saturn. Nevertheless, reasons can be found for expecting that planetary systems, including those containing biologically habitable planets similar to Earth, may be abundant in the Galaxy and Universe.

中文翻译：

---

太阳系可以帮助我们了解其他行星系统的形成方式，而其他方法则不能。

可以通过比较它们以一致的方式预测太阳系特征的能力来测试行星形成模型，然后通过不同的参数选择将其推断到其他假设的行星系统中。当这样做时，发现所得系统对恒星质量的直接影响不敏感，但确实强烈依赖于盘的性质，主要是其表面密度。重大的不确定性是由于缺乏适当的理论模型来预测我们太阳系类似物的存在，大小和分布，特别是天然气巨头木星和土星。然而，有理由期望行星系统，包括那些包含与地球相似的可生物居住的行星的行星系统，在银河系和宇宙中可能丰富。