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The Orion Arm is a minor spiral arm of the Milky Way galaxy. The Solar System and therefore the Earth lies within the Orion Arm. It is also referred to by its full name, the Orion-Cygnus Arm, as well as Local Arm, Orion Bridge, Local Spur and Orion Spur.
Our Local Arm is located between the Carina-Sagittarius Arm (toward the Galactic Center) and the Perseus Arm (toward the outside Universe), the latter one of the two major arms of the Milky Way. Long thought to be a minor structure, a "spur" between the two longer adjacent arms Perseus and Carina-Sagittarius, evidence was presented in mid 2013 that it might be in fact a branch of the Perseus Arm, or possibly an independent arm segment itself.
Orion Arm | SciencePenguin.com
Properties of the Milky Way