According to the indian vedas which is the oldest of literature and predates all other civilizations ,other advance civilizations to exist ,below is
the universe as per the vedas.
All the universes are clustered together up and down, and each and every one of them is separately sevenfold-covered. The watery portion is beyond the
sevenfold coverings, and each covering is ten times more expansive than the previous covering.
The extent of the cosmic phenomenon is calculated to be diametrically (both ways) four billion miles. Then the coverings of the universe begin. The
first stratum of the covering (earth) is calculated to extend eighty million miles, and the subsequent coverings of the universe are respectively of
fire, effulgence, air and ether, one after another, each extending ten times further than the previous. (SB 2.2.28 p.)
1 yojan = 8 miles = 12,8 km
Dhruvaloka, the polestar, is 3,800,000 yojanas above the sun. Above Dhruvaloka by 10,000,000 yojanas is Maharloka, above Maharloka by 20,000,000
yojanas is Janaloka, above Janaloka by 80,000,000 yojanas is Tapoloka, and above Tapoloka by 120,000,000 yojanas is Satyaloka. Thus the distance from
the sun to Satyaloka is 233,800,000 yojanas, or 1,870,400,000 miles. The Vaikuntha planets begin 26,200,000 yojanas (209,600,000 miles) above
Satyaloka. Thus the Visnu Purana describes that the covering of the universe is 260,000,000 yojanas (2,080,000,000 miles) away from the sun. (SB
Satyaloka, the topmost dimensional level in this world.
Muniloka is the general name of the abodes of great sages: Tapoloka, Janaloka, Maharloka.
group of seven stars
Group of stars
The moon is situated 100,000 yojanas above the rays of the sunshine. Day and night on the heavenly planets and Pitrloka are calculated according to
its waning and waxing. Above the moon by a distance of 200,000 yojanas are some stars, and above these stars is Sukra-graha (Venus), whose influence
is always auspicious for the inhabitants of the entire universe. Above Sukra-graha by 200,000 yojanas is Budha-graha (Mercury), whose influence is
sometimes auspicious and sometimes inauspicious. Next, above Budha-graha by 200,000 yojanas, is Angaraka (Mars), which almost always has an
unfavorable influence. Above Angaraka by another 200,000 yojanas is the planet called Brhaspati-graha (Jupiter), which is always very favorable for
qualified brahmanas. Above Brhaspati-graha is the planet Sanaiscara (Saturn), which is very inauspicious, and above Saturn is a group of seven stars
occupied by great saintly beings who are always thinking of the welfare of the entire universe. These seven stars circumambulate Dhruvaloka, which is
the residence of the Lord within this universe.
Svargaloka is the abode of demigods
Bhuvarloka - the level of semi-demigods (Carana, Vidyadhara, Kinnara, Kimpurusa etc.)
Below Rahu by 10,000 yojanas [80,000 miles] are the planets known as Siddhaloka, Caranaloka and Vidyadhara-loka." (SB 5.24.4)
Garbhodaka Cosmic ocean
Rahu is situated 10,000 yojanas below the sun. Below Rahu by another 10,000 yojanas are the planets of the Siddhas, Caranas and Vidyadharas, and below
these are planets such as Yaksaloka and Raksaloka. Below these planets is the earth, and 70,000 yojanas below the earth are the lower planetary
systems Bila-svarga: Atala, Vitala, Sutala, Talatala, Mahatala, Rasatala and Patala. Demons and Raksasas live in these lower planetary systems
The distance from the sun to the earth is lower planetary systems called Atala, Vitala, Sutala, Talatala, Mahatala, Rasatala and Patala. Below these
lower planets by 30,000 yojanas, Sesa Naga is lying on the Garbhodaka Ocean or Milky Way. That ocean is 249,800,000 yojanas deep. Thus the total
diameter of the universe is approximately 500,000,000 yojanas, or 4,000,000,000 miles. (SB 5.23.9 p.)
Between Bhuvarloka and Bhurloka is antariksa, an interplanetary space where the Sun is situated. Here live beings like Raksasas, Yaksas, Pisacas and
ghosts. They often descend on earth and are generally inimical to humans.
Ghosts - They are situated in the sky between the earthly planets and the heavenly planets."
"Beneath Vidyadhara-loka, Caranaloka and Siddhaloka, in the sky called antariksa, are the places of enjoyment for the Yaksas, Raksasas, Pisacas,
ghosts and so on. Antariksa extends as far as the wind blows and the clouds float in the sky. Above this there is no more air." (SB 5.24.5)
Bhurloka, or Bhu-mandala is the earthly level consisting of seven spheres (dvipas) - Jambudvipa, Plaksadvipa, Salmalidvipa, Kusadvipa, Krauncadvipa,
Sakadvipa, Puskaradvipa - which are inhabited by various human beings.
"The planetary system known as Bhu-mandala resembles a lotus flower, and its seven islands resemble the whorl of that flower. The length and breadth
of the island known as Jambudvipa, which is situated in the middle of the whorl, are one million yojanas [eight million miles]. Jambudvipa is round
like the leaf of a lotus flower." (SB 5.16.5)
The planet Earth where a human being is situated is within Jambudvipa.
Bila-svarga is the name of subterranean 'heavens' inhabited by the asuras and the Nagas. Bhagavata Purana lists seven of them, one below another:
Atala, Vitala, Sutala, Talatala, Mahatala, Rasatala and Patala.
Bila-svarga - "In these seven planetary systems, which are also known as the subterranean heavens there are very beautiful houses, gardens and
places of sense enjoyment, which are even more opulent than those in the higher planets
"Beneath Mahatala is the planetary system known as Rasatala They are called Panis. and they reside in holes like snakes. From birth they are
extremely powerful and cruel
Nagas - "Beneath Rasatala is another planetary system, known as Patala or Nagaloka, where there are many serpents, the masters of Nagaloka, These
hoods are bedecked with valuable gems, and the light emanating from the gems illuminates the entire planetary system of bila-svarga."
Hells (Naraka) star canopus - the lowest levels in the universe, places to suffer for committing specific
karmas for a determined time.