Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
यवनज्योतिर्ग्रन्थानामध्ययने द्विजानान्न दोषः ॥
So there is no dosha (fault) for the twice-born in studying the jyotisha (astrology) works of the Yavanas.
Simple meaning: Conclusion: Brahmins may study the foreign astrology books without fault.
अथ पङ्कोद्भवकमलादेरीश्वरपूजादौ त्यागस्स्यात्तथा भुजङ्गफणवर्त्तिमणिग्रहणेनादरस्स्यात् ॥
The objection fails: by that rule, the lotus from mud would be left out of worship, and a jewel from a snake's hood would not be valued.
उक्तञ्च गणेशदेवज्ञैः ॥
Ganesha Daivajna: though it came from the Turks, the Tajika is true, so good Brahmins may study it, like a lotus from mud.
हिल्लाजेन तु ब्रह्मविष्णुरुद्रमुखनिर्गतशापेन यवनताम्प्राप्तेन श्रीसूर्येणैव यवनशास्त्रप्रणयनाद्द्विजानामपि सूर्यसिद्धान्तवत्तदध्ययनं युक्तमित्युक्तम्॥
Hillaja's view: the Sun, cursed to be a foreigner, made the Yavana science, so Brahmins may study it like the Surya Siddhanta.