The Space Brothers consist of 7-8 extraterrestrial races that work together. Perhaps we can call their co-operative project help for a less developed planet? These individuals come from planets within our own solar system, like Mars, Venus, Saturn and Ganymede (one of Jupiter's moons that was colonized by a civilization coming from the star system Orion), but also from other solar systems and galaxies.
The Space Brothers look about the same as us. Some are high and blonde (Nordics), others have more Asiatic-Mongolic features. (Here we are talking about the real Nordics, not the fakes materialized by negative extraterrestrials in order to create confusion and destroy the mission of the Space Brothers).
Individuals coming from very advanced civilizations are etheric physical, not solid physical like us. They can at will, lower their vibration and become visible. Others are solid physical, like us.
http://ufofacts.org/spacebros/space.htm