In structure, our Milky Way is most similar to:
A)the Large Magellanic Cloud.
B)an upscale version of a globular cluster.
C)M-31, the Andromeda Galaxy.
D)the Orion nebula.
E)none of these.

Question

Quizplus · Accepted Answer

Our Milky Way is most similar in structure to M-31, the Andromeda Galaxy. Both are spiral galaxies with similar sizes and shapes, and they are even on a collision course with each other. The Large Magellanic Cloud is a dwarf galaxy and not structurally similar to our Milky Way. An upscale version of a globular cluster would lack the structure and complexity of a spiral galaxy. The Orion nebula is a star-forming region, not a galaxy like the Milky Way. Our Milky Way galaxy is a spiral galaxy with a central bulge surrounded by a disk of stars, dust and gas, and spiral arms. M-31, the Andromeda galaxy, is also a spiral galaxy with a similar structure, making it the most similar to our Milky Way. The Large Magellanic Cloud is a dwarf irregular galaxy, while an upscale globular cluster would consist of stars with similar ages and chemical compositions, unlike the diverse population found within our galaxy. The Orion nebula is a diffuse cloud of gas and dust, unlike the structured galaxy that is the Milky Way.

In Structure, Our Milky Way Is Most Similar To