Ākāśīdhāraṇā is one of five such dhāraṇās technically called ‘pañcadhāra-ṇās’ in the works on Haṭhayoga. Such dhāraṇās help in the conquest of the mind. This again can—when properly guided—lead to the realization of the Self. Incidentally, certain supernormal powers are also attained in the process.
Ākāśīdhāraṇā is dhāraṇā or fixing the mind on the principle of ākāśa or ether. The colour of ākāśa is like that of ocean water. Sadāśiva is its presiding deity. Its bīja (seed-letter) is ‘ha.’ Fixing the mind along with the prāṇa on it for five ghaṭikās (one ghaṭikā = 24 minutes) will help the yogi to gain liberation. Neither death nor pralaya (dissolution of the world) can affect him.