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lunar distance 月距〔月與太陽或星之間的角距〕。

lunar eclipse

From 12 to 14 may , this mysterious string of comet will pass earth at a mere 0 . 0735 astronomical unit i . e . 29 lunar distances . astronomers expect that the biggest fragment will shine as bright as magnitude 5 5月12至14日,這串神秘的彗星會于地球0 . 0735天文單位即地月距離的29倍外掠過,天文學家預測它最大的碎片會亮至5等。