Universe Actual Universe according to Billy Meier
System Tayget binary star System
Orbital Position  ? (estimated to be between 3 and 4 and the other 3 inhabited worlds are more like 4 5 and 6 or 5 6 and 7)
Moons unknown
Class Terrestrial
Gravity unknown but estimated to be slightly less than 1 G due to the world being slightly smaller than the earth.
Atmosphere breathable / earth-like
Climate (slightly colder than Earth)
Diameter ( slightly Smaller than Earth)
Primary Terrain (Estimated to either mostly Water surface or nearly half of land and water surface area)
Surface water Liquid Surface water, And Earth-like Oceans and Seas.(surface areas water estimated to between 50 to 90% of total Surface area)
Notable Species Plejaren (Also known as Nordic aliens in other sources)and Ring Nebula refugees known as the Dal.
Rotation period (slightly slower than earth 25 or 26 hour days)
Orbital Period  ? (estimated to between slightly faster years to slightly slower years)

Erra is a planet in the Pleiades star cluster where the Plejaren race was said to come from by UFO contactee Billy Meier.

The Plejaren have a Human appearance the descriptions of them match "The Holy Watchers" from Canaanite mythology from the 3100 to the 2900 BC time period. The Titans from Greek Mythology also matching the descriptions of the Plejaren they were all white , caucasin apearing  people, and as well as the Anunnaki (Angel and Ki) race from Sumerian Civilization. As well as the fallen Angels from Christian Religion in fact in the christian bible the Anunnaki are referded to as the Nephilim Thee fallen ones Ne-.Thee phil -Fallen and as always Im for ones I for indiviudam plus m for mankind so its Im for ones so the fallen ones is what there called in the bible. The Dakote transported off all the poeple from the Earth that were in danger of its great flood around 3000 BC and sent them to live on the planet Erra. acording to Enoch this actually happend and acording to Enoch it was a Penal colony for the white flood survivors on Earth so the angels were really humans the whole time thats why it is possible for them to interbreed and form the angels and Earthling race the Anunnaki or a interbreed and had a Nephilim in Christian bible Eventually nearly 5000 years later Billy Meir finds one of the white people flood survivors from planet Earth who came from the Planet Erra. thats the reson why the people of Erra have cannanite names is because the Preservers race the dakote saved them from both floods the flood of 24,000 BC on Erra and the flood of 3,000 BC on Earth. in 24,000 BC half a billion were evacuaed and in 3,000 BC about 10 or 20 million were transported of to Erra and they evolved into the Plejaren. 

These Pljaren are the Angels in the Bible, and also in Canaanite in the first book of Enoch he spoke alot about Erra being a analog to the Earth as well as the fact that the fallen angels were put in a prison town named Dudael located in a desert. The discriptions that Enoch gives of Erra match that of Lemuria. The discription says of seven mountains and a large desert in the west of Lemuria. Its possible that the Lemurians were the Ancestors of the Plejaren. The Fallen Angels were put in a prison in the western desert in a place called Dudael acording to Enoch. The Archangels are also in a prison the Arch Angels prison on Earth is in Mesopotamia near the river Euphrates in what is now Iraq there the 4 horsemen of the Apocalypse talked about that defeated the Locust men led by Abaddon but was costly a third of all Human life ended in the space battle of the future in revelations 9.

A Basic artists impression of the main super continent of Lemuria based on the descriptions of the other Earth Erra said to be in the Seven Stars according to Enoch in the first book of Enoch. along the costs you can see embeded in the map the outlines of Austrialia , New Zealand in the far north east of Lemuria was the outlines of North America as well as varius outlines of other areas in Asia, this is all done to give a sense of scale to how big Lemuia was, and its a was becasue this super continet gets destroyed by a flood in 24000 BC. It was roughly the size of the pacific ocean plus another couple small continents like Australia bigger but not quite a large continent bigger than the pacific ocean. But Lemuria was super-continent.

The Plejaren were taller than the Humans measuring 6 to 12 feet tall, there Homeworld of Erra is slightly smaller so the gravity there is lower than that of 1 G here on earth so the lower gravity caused the Plejaren to become taller humans than the one on Earth. However the Plejaren homeworld of Erra is said to only be fractionally smaller than Earth. despite this they were giants acording to various scriptures. Erra had a population of around 500 million people as of the late 20th century. Erra is said to be one of ten planets which orbit its star (Tayget) in its solar system. Its also said to be one of 4 inhabited planets in the Tayget star system the other three inhabited planets are Dakota ,Vela and Pyra according to Star Ambassador Tanka Wheneh. Vela is Venus its either the second or third planet from its Sun one of the Tagete binary stars. Pyra on the other hand is Mars its either the forth , fifth or sixth or even seventh planet from its sun because the enviroment of Dakote was Earth-like. so it has to be Dakote was the forth or fifth planet from its sun Pyra is the fifth or six world it was not a earth-like world so Pyra had to be terraformed by the Dakote people the dakote were even more technologically advanced than the Lemurians and the Angels that came from there. The Mountain of Righteousness that Enoch spoke of is located on the map to the right where all though mountain chains are coming together in one spot. thats were the ruler of the Angels and Lemurians lived. the Mountain of Righteousness survived the great flood of 24,000 BC eventually some of the Angels went back to recolonize the place with humanoid life a common girls name on the planet Erra is Semjaza according to both Billy Meir and Enoch about 2,900 or 3,000 BC after the great flood on Earth. in the Canaanite bible and the earliest part of the Christian bible. so Semjaza is clearly a common girls name in the era after 24000 BC but before this the name was sounding more Polynesian like. now the names are sounding more Canaanite like.  
Picture of Lemuria after the flood

This is a picture of the surface of Erra with its main continent of Lemuria after the flood of 24,000 BC. The main continent is no longer a continent its now a archipelago of subcontinents its similar to the other picture except its tilted at a angle and there are clouds obscuring the western desert region. The Survivors of the Flood the Lemurians and the Datkote went to Earth right after the flood in 24000 BC they went to Japan and China Korea but eventually these people went over the Bering strait and came to North America. The Dakote were the actual fabled Preservers race of Star Trek lore.