Ketra

Ketra refers to a fictional alien race from the science fiction television series Stargate SG-1. They are a technologically advanced humanoid species who have achieved a significant level of biological and technological evolution, allowing them to ascend to a higher plane of existence. The Ketrans are depicted as beings of pure energy, existing in a state beyond the physical realm.

The Ketrans originally resided on the planet K'Tau. Their ascension was a deliberate process, a collective choice to evolve beyond their physical forms. This ascension granted them immense power and understanding of the universe. They are generally portrayed as benevolent and wise, often intervening in the affairs of less advanced civilizations to guide or protect them. However, their motivations can sometimes be inscrutable to those who remain in physical form.

The Stargate program encountered the Ketrans through their interactions with other species, notably the Asgard and the Goa'uld. While not actively hostile, the Ketrans can be formidable when their interests are threatened. Their advanced nature means they operate on principles and with technology that are largely incomprehensible to humans. They are often seen as guardians or overseers of the galaxy, observing and occasionally influencing events from their elevated state.