Astronomy · Irregular Galaxies
What is a distinguishing structural boundary feature of irregular galaxies compared to spiral or elliptical galaxies?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1They are surrounded by a symmetrical ring of dark matter that creates a distinct edge
- 2They lack a well-defined shape or sharp boundary, with their edges thinning out gradually✓
- 3They have a perfect spherical shell that acts as a boundary
- 4They possess a highly rigid, sharp, and well-defined outer boundary
Correct answer
They lack a well-defined shape or sharp boundary, with their edges thinning out gradually
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