Astrology: 

Neptune's themes or keywords are transcendence and clarity, "spirituality", dreams and therefore also the "nebulous", veils, escapism and addictions. In my opinion he got also a lot to do with trust... 

I see him as a "portal and bridge planet" between the more inner and outer worlds, to find the clarity of core experience and feeling, to merge with Universal consciousness and the own surrounding - to find the own "stream of life" from "dream/vision" to intention and further to purpose - to reach this "flow", when in "coherence"  with clear inner communication (cell phone) is of most importance... yes, it's a "two way street"... incoming and outgoing call.... 

​

Our cells are containing mainly water - what are we telling them.... emotions are often the "veils" we have to lift or the walls we have to break down. Further more, when we talk about Neptune and about mysticism and spirituality as well as transcendence there is to note, that he wants to bring us beyond - beyond what we today may think possible... Beside this, I, during my research of the cycles, discovered that Neptune's Perihelion-Aphelion axis changes very fast - it's his axis of influence...

I thought this very interesting in the perspective that he's the ruler of the age and with his moves making lots of "waves" in the system....

 

 

Greek Mythology: 

Neptune (Roman) - Poseidon in Greek - Both the God of the Sea. He's Zeus' Brother and only second in power. His sign, the Trident, is seen in ancient art and is also his astrological glyph. Furthermore he made the horse to give to humanity. His chariot was drawn by fish-tailed horses (hippokampoi in Greek) and the Dolphin was also thought to be one of his sacred animals. His sacred plants were the pine tree and wild celery (planet Ayurveda). ... 

So, we can clearly see the correlations to memory and communication (hippocampus), sleep / dream, and "clarity" / transcendence (pineal gland - serotonin and melatonin - light and dark).

​

As the ruler of all water/liquids, he's a moody deity with a pretty unstable temper but also brave. He preferred to stay on Mount Olympus than his own home down on the ground of the sea. He had a bad relationship with Athena and Odysseus. One of his sons is Pegasus, who was born from Medusa's throat.

Emotions are tightly linked to memory - the associations and synapses we build.

​

​

Some Astronomy: 

Neptune is the eighth and farthest-known "main" planet from the Sun. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth, slightly more massive than near Uranus. Neptune is denser and physically smaller than Uranus because its greater mass causes more gravitational compression of its atmosphere.

Neptune orbits the Sun / barycenter once every 164.8 years - therefore spends 13 to 14 years in one sign. 

Neptune rotates around his own axis (Neptune day) once in 16 hours with a tilt of axis in reference to his own orbit of around 28 degrees. Newer scientific observations have shown, Neptune to have 2 axis... 

Also newer discoveries show a kind of "inner heat source".

Neptune emits around twice as much energy than taking in from the Sun.

 The perihelion distance is 29.81 AU; the aphelion distance is 30.33 AU.

On 11 July 2011, Neptune completed its first full barycentric orbit since its discovery in 1846, although it did not appear at its exact discovery position in the sky, because Earth was in a different location in its 365.26-day orbit; if the more common heliocentric coordinate system is used, the discovery longitude was reached on 12th of July 2011.   (Ref. Wikipedia and NASA)