当城市灯火渐暗，夜空澄澈如洗，你或许会注意到几颗格外明亮的行星，仿佛约好般排成一线，在苍穹中彼此呼应。这就是传 …
Using Math to Find Planetary Alignments in the Past 20 Years
When city lights grow dim and the night sky becomes crystal clear, you might notice several particularly bright planets, as though they’ve agreed to line themselves up in the heavens. That’s what we call a planetary alignment. Even though these celestial bodies don’t actually form a perfect …
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