Story of Dhruva.

King Uttanpad who was son of Manu and Shatroopa, had two wives first was Suniti and the other was Suruchi.

Suniti had a putra named Dhruva and Suruchi had a putra named Uttam.

King was more affectionated by Suruchi.

Once Sunita's Putra Dhruva was playing in his father's lap and when his younger wife Suruchi saw this she got angry and pulled Dhruva out of his lap and put his son Uttam there.

She told him that only the child who is born from her womb can play in the lap of King or can sit on the throne.

Dhruva was so distracted by this incident so he went to his mother Sunita, Sunta explained him that his father is more attached to the other queen

he doesn't love them as much as he do to them. She said him that he should go into Bhagwan's Sharan.

After listening his mother he left his home and went to Yamuna bank while he was going there he also met to devrishi Narad muni,

Narad muni tried to convince him to return his home but he didn't listened, then Narad muni gave him Mantra Gyan.

Dhruva started doing Tapa there on the banks of Yamuna.

Bhagwana Narayana was pleased by his devotion and dedication.

Vishnu booned him to be Dhruv tara and to rule the earth for 36000 years.

And gave him the Lok around which all the Nakshatras and Saptrishis revolves that Lok started to be called Dhruva Lok.

He was also booned to be get the Narayan Loka eventually.