Rigveda has only one mention of the caste system in one piece of a hymn called Purusha Shukta which, as per contemporary philosophers is a later manipulation. The controversial hymn does not discriminate or say anything which creates any concern, but still, the mention of four castes is there. Sanskrit is a far newer version and usually, in Rigveda, everything has been mentioned more than once. However, Brahmin, who will conduct a ritual is mentioned several times. Hence, I can safely conclude that it is a role-based arrangement as Brahmins were required to execute Brahmanas. The mandala 10, Shukta 90, hymn 12th says
Navamsha in Vedic Astrology
While the Lagna Chart (D-1 chart) is based on the actual position of the planets, the zodiac signs (rashi) and the Nakshatra for a…