Which of the Following Statements About the Different Types (Shapes)

question 20

Multiple Choice

Which of the following statements about the different types (shapes) of galaxies is correct?

• A) whatever type a galaxy is at its birth, that's what it will be for all time
• B) all galaxies start out as ellipticals, but some later evolve to be spirals and irregulars
• C) 90% of all galaxies are spirals (including our Milky Way); the other two types are very unusual
• D) collisions and mergers between galaxies can sometimes change a galaxy's type (shape)
• E) what type we see a galaxy to be just depends on the angle at which we happen to see it; all galaxies look roughly the same in shape
• Section 26.3: Properties of Galaxies

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