The most popular idea proposes that solid cores amass from protoplanetary disks and behave like seeds , attracting gas to grow into giant planets 最流行的学说倡议：固态的行星核心由原生行星盘获取质量，就像一颗种子，能吸引气体长成为巨行星。
Studying these giant planets and their weird satellites helps us understand not only the formation of the solar system but also the planetary systems of extrasolar worlds 研究这些巨行星和它们千奇百怪的卫星，将有助我们了解太阳系的形成过程，以至太阳系外其他的行星系统。
Dr eisner argues that the separation of material in the protoplanetary disc indicates that something ? possibly the star ' s magnetic field ? is holding some forms of matter away from the surface 问题是，迄今观测到的大部分外部行星? ?气态巨行星，太靠近他们的起源恒星，不可能在那里诞生。
There are going to be found many , many more giant planets in the next years , because our technology for detection them is improving , but furthermore , we may discover that earth - like solar systems like our own are extremely common 随着探测技术的提高，在未来一年里，还将会有更多的巨行星被发现，而且我们可能会发现类似地球所在的太阳系其实在宇宙中很普通。
