Which description best captures the Milky Way’s structure?

• A. A spherical cluster of stars with no disk.
• B. A ring with no central bulge.
• C. A spiral galaxy shaped like a large rotating disk with central bulge.
• D. A random scattering of stars with no overall shape

Answer: (C)

The Milky Way is best understood as a spiral galaxy with a flat, rotating disk that contains stars, gas, and dust, plus a dense central bulge of older stars. This arrangement explains why we see spiral arms—regions of active star formation within the disk—and why there’s a bright, crowded hub at the center. A spherical cluster would imply a more ball-like distribution with no disk; a ring without a center would miss the central mass and the spiral structure that characterizes a true disk galaxy. The rotating disk plus central bulge description matches how stars and gas orbit the center and how the brightness and star populations vary across the galaxy.