Question

the milky way galaxy is described as a disk of stars orbiting a central point on the disk. which of these best explains why people on earth cannot see the entire shape of the milky way? the center of the galaxy consists of a dense cluster of stars. many more stars exist outside the galaxy. the stars in the center of the galaxy are extremely small. earth is a part of this galaxy

Explanation:

Since Earth is located within the Milky - Way galaxy, our vantage point is limited. We are inside the structure we are trying to observe, which obstructs our view of the entire shape. The other options do not directly relate to the inability to see the whole shape of the galaxy. A dense cluster of stars at the center, stars outside the galaxy, or the size of central stars do not prevent us from seeing the overall shape as much as our location within the galaxy does.

Answer:

Earth is a part of this galaxy