What type of galaxy is the Milky Way?

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Prepare for the NES Earth and Space Science (307) Test. Use flashcards and multiple-choice questions with explanations to enhance your understanding and boost your confidence. Excel in your exam preparation!

Multiple Choice

What type of galaxy is the Milky Way?

Explanation:
Galaxies come in a few common shapes: spiral, elliptical, and irregular. The Milky Way is a spiral galaxy because we observe a flat, rotating disk with spiral arms extending from a central bulge. This spiral structure, along with ongoing star formation in the arms, is what characterizes spiral galaxies. Elliptical galaxies are more rounded, featureless overdensities with little gas and star formation; irregular galaxies lack a clear shape; dwarf galaxies are small companions of larger galaxies. The Milky Way’s size, disk, and arms (and a central bar) fit the spiral type.

Galaxies come in a few common shapes: spiral, elliptical, and irregular. The Milky Way is a spiral galaxy because we observe a flat, rotating disk with spiral arms extending from a central bulge. This spiral structure, along with ongoing star formation in the arms, is what characterizes spiral galaxies. Elliptical galaxies are more rounded, featureless overdensities with little gas and star formation; irregular galaxies lack a clear shape; dwarf galaxies are small companions of larger galaxies. The Milky Way’s size, disk, and arms (and a central bar) fit the spiral type.

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