太虛
太虛者，有稱太空、天、宇，天外虛無一物，故名。其西學天文者有內外之別，內太空者凡行星之範疇也。行星之外皆曰外太空。
太虛一文似未成。宜善之。This article uses material from the Wikipedia 古文 / 文言文 article 太虛, which is released under the Creative Commons Attribution-ShareAlike 3.0 license ("CC BY-SA 3.0"); additional terms may apply (view authors). 若無側注，諸文皆奉CC BY-SA 4.0以行。 Images, videos and audio are available under their respective licenses.
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