2021 中學磨鏡班 Secondary school telescope making class

分類: 天文活動 Activities
2021-08-14
天文望遠鏡製作班，每位學生學習磨製一片130 f/5牛頓式反射鏡。
Telescope making class, students learn how to grind their own 130 f/5 Newtonian mirror.
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