Twins are born minutes apart — why are their lives so different?

their main charts are nearly identical, but fine divisional charts can differ — and karma, choices and upbringing differ more.

This is one of the oldest objections to astrology, and a fair one. With a gap of a few minutes, the rāśi chart (D-1) is usually the same, but finer charts like the navāṁśa (D-9), daśāṁśa (D-10) and especially very fine divisions like the ṣaṣṭyāṁśa (D-60), which changes every couple of minutes, can differ. Some astrologers read twins through these.

Other traditions read the first-born from the chart directly and the second-born from a derived chart, for example counting houses from the third (younger sibling) house. Practices vary and none is universally accepted.

The honest answer is that a chart shows tendencies, not a script. Two souls with different karma, different choices and different experiences will live different lives, even under the same sky. That is a good reminder for all of us.

Source: Bṛhat Parāśara Horā Śāstra (vargas); modern practice · D-60 changes every ~2 minutes

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