The Andromedans come from an unnamed planet in the Adromeda Galaxy, which is 2.5 million light-years away from Earth.
Andromedans have different individual special abilities. However, because of their inherent radioactivity, their touch will do great physical harm to Earth people, and vice-versa.
Andromedans resemble humans, however the resemblance is not exact. Their skin appears to have a golden or bronzed coloration. Likewise their hair is golden or bronzed and does not appear to have the same texture or composition as typical human hair. Because of their radioactive qualities, the Andromedans epidermis and keratin layers are likely comprised of different elements than those of humans.
Minonee and her family are the only known Adromedans encountered by humans. Minonee and her family are never referred to as "Andromedans" as the designation is merely a convenience since their point of origin is the Andromeda Galaxy. Minonee and her family never mention the name of their planet or their civilization to Steve Austin, Oscar Goldman, or any other humans they encountered.