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恒星交会<br />
恒星大多成群成团产生,因此<br />
双星或多星系统是普遍现象.<br />
在太阳系形成的早期,如果另<br />
一颗恒星从太阳系附近经过,<br />
将会扰动、激发太阳系内的<br />
天体.<br />
Ida et al (2000)证明一个太阳<br />
质量的恒星从离开太阳大约<br />
q~100AU的地方经过,则有可<br />
能充分激发KBOs轨道.<br />
这一模型还部分解决了KB的<br />
质量和边界问题.<br />
θ 是恒星轨道与 KB平面的交角<br />
, a以交会距离<br />
q为单位<br />
c
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