Symbols - What does heaven look like
Greek mythology used personifications to represent the systems of the universe. Ouranos; Ancient Greek Οὐρανός, meaning "heaven", was the primal Greek god personifying the ‘sky’. But is possibly better thought of as the God of the Stars - those in the Signs of Zodiac and those found in the Milky Way. His equivalent in Roman mythology was Caelus.
The name has an interesting etymology as the basic Indo-European root is *ṷérs- ‘to rain, moisten’ (also found in Greek eérsē ‘dew’, Sanskrit várṣati ‘to rain’, Avestan aiβi.varəšta ‘it rained on’), making Ouranos the ‘rainmaker’. Rain and dew are both key symbols for spirit input.
In Ancient Greek literature, Ouranos was the offspring of the Great Mother from the concept of the Father and Mother symbolism. According to Hesiod's Theogony, Ouranos was conceived by Gaia alone.
The Milky way galaxy consists of a bar-shaped core region surrounded by a disk of gas, dust and stars forming the four distinct arm structures spiralling outward from the Galaxy's centre. It is turning according to precise mathematical formula. Each spiral arm describes a logarithmic spiral with a pitch of approximately 12 degrees. The distribution of mass in the Milky Way Galaxy is such that the orbital speed of most stars in the Galaxy does not depend on its distance from the center. Away from the central bulge or outer rim, the typical stellar velocity is between 210 and 240 km/s.
There is thus system at work here with systems of turning, and systems of agglomeration of matter.
The Theogony of Hesiod - translated by Hugh G. Evelyn-White 
But afterwards she [Gaia] lay with Uranus and bare deep-swirling Oceanus, Coeus and Crius and Hyperion and Iapetus, Theia and Rhea, Themis and Mnemosyne and gold-crowned Phoebe and lovely Tethys. After them was born Cronos the wily, youngest and most terrible of her children, and he hated his lusty sire.