Celestia教學活動之七幻燈片

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\title{Celestia 的宇宙}
\subtitle{Celestia 教學活動幻燈片}
\author{陽光志願者}
\date{\today}
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\centerline{\kaishu{\zihao{3}Celestia 的宇宙飛船}}\\[2pt]
\centerline{\kaishu{\zihao{4}地球和月球太空船}}
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\section{開啟太空時代}
\subsection{人造衛星}
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從\href{file:///C:/Program Files/Celestia161-ED/Activity_cels/Activity7.vbs}{\beamergotobutton{這裡}}開始我們的太空旅行。
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