 The Navagraha was furthered by additional contributions from Western Asia, including Zoroastrian and Hellenistic influences.The Yavanajataka, or 'Science of the Yavanas', was written by the Indo-Greek named "Yavanesvara" ("Lord of the Greeks") under the rule of the Western Kshatrapa king Rudrakarman I.The Yavanajataka written in 120 CE is often attributed to standardizing Indian astrology.