The Urdhva lokas or upper spheres of the world are composed of seven lokas or "world" according to Hindu mythology. The detailed explanation of them is found in Vishnu Purana. The three highest Lokas (realms), Jana, Tapa, and Satya are styled durable while Maharloka, has a mixed character; for although it is deserted at the end of the Kalpa, it was not destroyed yet.
The sphere of the Earth or Bhū-loka (‘Bhu’ means ‘Earth’ and ‘loka’ means the surface of the Earth), comprehending its oceans, mountains, and rivers, extends as far as it is illuminated by the rays of the sun and moon; and to the same extent, both in diameter and circumference, the sphere of the sky (Bhuva-loka) spreads above it (as far upwards as to the planetary sphere, or Swarga-loka). 
The region, where the Siddhas and other celestial beings move, is the Earth's atmospheric sphere which also contains space which has it's neighbouring planets in the solar system along with stars and comets.
The interval between the sun and Dhruva, extending fourteen hundred thousand leagues, is inhabited by the Devas, including Devis with their king Indra and it's references make it equivalent to the Swarga (heaven), while some Puranic references equate Swarga aloka to the Solar System.
Above Dhruva, at the distance of ten million leagues, lies the sphere of saints, or Mahar-loka, the inhabitants of which dwell in it throughout a Kalpa, or day of Brahmā.
At twice that distance is situated Janaloka, where the Sanandana (four Kumaras) and other pure-minded children of Brahmā reside.
At four times the distance, between the two last, lies the Tapa-loka (the sphere of penance), inhabited by the immortal beings and deities called Vaibhrájas, who are highly knowledgeable, pure, and enlightened, whereby they can easily travel to the uppermost realm, Satya-loka, are unconsumable by fire of destruction during the dissolution of the universe.
It is highest plane of consciousness or the highest of the heavenly realms. It is also called Brahma Loka where Brahma and his wife, Saraswati, resides. It is six times the distance (or twelve Crores, a hundred and twenty millions of leagues) and is referred to as the sphere of truth, where all the knowledge is available and the inhabitants never die, become old, become ill, have pain and anxiety.
This article incorporates text from The Vishnu Purana, translated by Horace Hayman Wilson, 1840, at sacred-texts.com, a publication from 1840, now in the public domain in the United States.