厘米尺度尘埃的低速碰撞

http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1102.4441

老实说,凭直觉很难想像那些岩石状的小行星是通过碰撞逐渐长大的。行星子是由小尘埃汇聚而成的吗?即便两个尘埃碰撞后其中一个获得了质量,获得的这部分质量是不是紧紧附着的?会不是下次轻轻一碰就被碰掉?

有没有可能在超新星爆发的时候形成行星子呢?

一个样品4.1g,SiO2,压实,体积填充因子约0.5。

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