The Q are a Hyper-Evolved, omnipotent and immortal Energy based species who form the Q Continuum
The Q possess the ability of instantaneous matter-energy transformation and teleportation, as well as the ability of time travel. The Q also appear to have control over space, matter, and time within Other Universes as well. In addition, the Q appear to have vast telepathic and awareness of all things around them. They were first encountered by the crew of the USS Enterprise (NCC-1701-D) in 2364.
The Q evolved over countless Eons into their current form and consider themselves to be the ultimate form of evolution. However, this often leads to a "been there, done that" feeling of apathy with regard to most of the universe for many Q. (VOY: "The Q and the Grey") However contrary to that attitude many Q explore vast portions of the universe in order to further their own purpose of their own existence within our plane of existence, and some Q such as Q traveled even into other universes. Guinan considered some of the Q as fairly respectable. One exception was the Q who often visited the crew of the USS Enterprise-D. (TNG: "Q Who")
Childhood & Celestial StudyEdit
All Q children mature within only a few months. So in order to give them a full childhood adult Q place them in a temporal bubble that stretches out their childhoods to what appears to be near decades.
Within only a few days after birth (also called the Creation Event) All Q children are sent to the Celestial Academy to further improve their control over their immense powers.
An aspect of 24th century interactions with the Q includes involvement in a Q Civil War. The Q had come to fear the influence of Human compassion and curiosity into their otherwise timeless, apathetic, and stable culture. The war was incredibly destructive to our dimension and involved weapons which, during a firefight, "incidentally" destroyed stars in various regions of Delta Quadrant space.
A point of some confusion is the fact that all Q, under normal circumstances, are known merely as "Q," and seem not to have any proper names. This causes causes no confusion among the Q as they always know which of them is being referred to when the name "Q" is used. Some, such as Quinn, choose a name, though most are referred to by fans with descriptors (such as "female Q"). "Q" alone is usually in reference to the most notable member of the species, played by John de Lancie.