Linked from
The 17 pages that link to Galactic disk, each with the reason it gives.
Galactic bulgeRelated: The disk surrounds the bulge in many spiral galaxies.
Galactic barRelated: The bar forms from disk material and lies within the disk’s plane.
Orion ArmRelated: The Orion Arm lies within the Milky Way’s disk.
Scutum–Centaurus ArmRelated: The arm is a large-scale structure within the Milky Way’s disk.