Orion Arm

The Orion Arm is a spiral Arm of the Milky Way galaxy. The Solar System and Earth are within the Orion Arm. It is also referred to as the Local Arm or the Orion Spur. It is named "Orion" due to its proximity to the Orion Constellation.

By 2490, UNSC colonial space encompassed over 800 planets and colonies ranging from small, to large important military strongholds.

Related Articles

 * Planetary Systems
 * Milky Way
 * Solar System
 * Earth
 * Mars
 * Jovian Moons