《明史·志·卷三》
庚子日，彗星出现，有光芒，流向东南，长三尺。
庚子，彗星见，有光，流东南，长三尺。
On the day of 庚子 (day of the seventh stem Heavenly Stem, and first earthly branch), the comet appeared, with light, flowing to the southeast, 3 feet long.
<s>[INST] Kindly elucidate the central themes in this passage in English: 庚子，彗星见，有光，流东南，长三尺。 [/INST] On the day of 庚子 (day of the seventh stem Heavenly Stem, and first earthly branch), the comet appeared, with light, flowing to the southeast, 3 feet long.</s>
Kindly elucidate the central themes in this passage in English: 庚子，彗星见，有光，流东南，长三尺。
user
On the day of 庚子 (day of the seventh stem Heavenly Stem, and first earthly branch), the comet appeared, with light, flowing to the southeast, 3 feet long.
assistant