Translation of "Periferia" in English

Que se encuentran en la periferia del sistema solar,

that go way out to the outskirts of the solar system,

Si vives en la periferia, el coche resulta algo necesario.

You need a car if you live in the suburbs.

Luego vi al tiburón en la periferia, rastreando su olor. Y pensé: "No, es otra…

Then you just saw the shark swimming on the periphery, picking up her scent. And I thought, "Oh, no, this is this whole...