One Rajju or Rajlok is the distance covered by a deva

Deva (Hinduism)

' is the Sanskrit word for god or deity, its related feminine term is devi. In modern Hinduism, it can be loosely interpreted as any benevolent supernatural beings. The devs in Hinduism, also called Suras, are often juxtaposed to the Asuras, their half brothers. Devs are also the maintainers of...

 flying for six months at the rate of 2,057,152 Yojans every Samay

Samay

Samay is a unit of time representing the blink of an eye, or about a quarter of a second. An ordered set of these instants is known as an Avalia....

 (approx. 2,047,540,985,856,000 kilometres or 216.5 light-years). It can also be equivalent to the distance traveled in 6 month

Month

A month is a unit of time, used with calendars, which was first used and invented in Mesopotamia, as a natural period related to the motion of the Moon; month and Moon are cognates. The traditional concept arose with the cycle of moon phases; such months are synodic months and last approximately...

s by a ball of iron weighing 1,000 Bhar

Bhar

The Bhar are a Hindu caste found in North India. They are also known as Rajbhar. British historian General Cunningham said that Bhars are branch of the Ahir tribe.-History and origin:...

 let fall freely from Swarga, home of Indra

Indra

' or is the King of the demi-gods or Devas and Lord of Heaven or Svargaloka in Hindu mythology. He is also the God of War, Storms, and Rainfall.Indra is one of the chief deities in the Rigveda...

. Seven rajjus make a Jagasreni.

The concept of Rajju was born of the desire to quantify relative dimensions in time and space in proportion to the achievement of Nirvana

Nirvana

Nirvāṇa ; ) is a central concept in Indian religions. In sramanic thought, it is the state of being free from suffering. In Hindu philosophy, it is the union with the Supreme being through moksha...

or some similar enlightened state.