演講資訊

摘要：

Several lines of evidence, both theoretical and observational, indicate that additional planets in the outer solar system remain to be discovered. Recently, attention has been focused on 'Planet Nine', a few Earth mass planet with a moderate inclination at a distance of a few hundred AU (Trujillo & Sheppard 2014, Batygin & Brown 2016, Brown & Batygin 2016). I will review this evidence for the existence of this body and will present an update on a variety of approaches that are being used to find it.

許多觀測和理論上的證據皆顯示有一顆尚未發現的行星存在於太陽系外圍的可能性。近期的一些研究所關注的這個'第九行星'，推測大約有幾個地球質量重，且有著適中的傾角，並距離太陽幾百個天文單位之外 (Trujillo & Sheppard 2014, Batygin & Brown 2016, Brown & Batygin 2016)。我將在演講中評論這些研究所提出的證據，並討論一些我們目前正在使用的方法來尋找第九行星的存在。

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