They are the Nakshatras and yoginis. They were engaged in assisting the course of nature. The Grandsire (Brahma) had another son, named Muni. His son was Prajapati.
सर्वा नक्षत्रयोगिन्यो लोकयात्रा विधानतः। पैतामहो मुनिर्देवस्तस्य पुत्रः प्रजापतिः॥