Solomons' Species

The Solomon family are a group of extraterrestrials appearing in the 1996 television series 3rd Rock from the Sun. The family is composed of Dick, the High Commander, Sally, a decorated military officer, Tommy, a seasoned intelligence specialist, and Harry, the communications officer. Although their true nature and homeworld are almost completely unknown, we do know that the Solomons' have landed on the planet Earth as part of a research expedition to observe the native humans. In order to blend in to human society, the aliens have assumed a human form.

Homeworld
Virtually nothing whatsoever is known of the Solomons' home planet. Not even its name is known to viewers. When mentioned on the show it was simply referred to as 'the home planet'. Its location is stated to be in a barred-spiral galaxy on the Cepheus-Draco border which is about 14 lightyears away from our sun, as stated by Sally Solomon while criticizing Harry's choice of music at the tail end of the first season. In episode 18 of Season 3, Tommy states that there's a film in the air, and that the atmosphere is drafty, and implies that the home planet has no gravity.

Biology
The true form of the aliens is almost completely unknown. It has been said that their natural forms resemble gelatinous purple tubes though they have also been referred to as clouds of gas in their childhood states which belies some idea of what their society is like. Upon arriving on Earth in their human forms, Dick was surprised that human heads could not swivel to 180 degrees, asking "How do they lick their backs?" Their natural bodies lack the forms of physical definition that humans have, including sex organs. Reproduction in their species is described as entirely non-sexual, involving simply sending packets of genetic material to possible partners through the mail. The members of their species are apparently so outwardly similar to one another that the Solomons have little to no concept of race or ethnicity, and possibly even gender. Sally asks at one point why she had to be the woman. Upon taking up their human disguises, the Solomons had to invent a race for themselves, even though they are appear obviously Caucasian. They eventually decided that they were Jewish because of their surname (which they had seen on the back of a passing truck). It has also been mentioned that the Solomons' race are almost completely barren of emotion and most of the relationships that humans have with another. The Solomons experience human emotion for the first time during their mission on Earth, and are most unprepared to deal with this sudden emotional surge. While it is clear that they are unemotional they do seem to have some semblance of what humans would consider emotional interaction. In a sense, they could have vestigial emotions.

Society and culture
The Solomons' race is far more technologically advanced than any human society. Some of their technological achievements include intergalactic space travel, the able to completely alter their natural forms into that of a human and reproduce in an entirely non-sexual manner. Harry effectively acts as an unwilling radio transmitter from their home planet due to a chip implanted in his brain. The Solomons' race has an understanding of physics that is so advanced as to make even the most advanced knowledge of physics on Earth appear rudimentary. They also have an impressive knowledge of the arts, suggesting an artistic society. The highest ranking official named in the show was the Big Giant Butt, William Shatner played the Big Giant Head who apparently got the job by kissing the Big Giant Butt. Rulers on their planet are unelected and are assumed infallible. It is stated that politicians on their world are chosen by seeing which one can outrun a giant fireball. Their society is almost completely emotionless.