The Tully-Fisher Relation (Looking at Rotation Speeds) Only Works For

question 21

Multiple Choice

The Tully-Fisher relation (looking at rotation speeds) only works for:

• A) elliptical galaxies
• B) the very closest galaxies, within a few dozen million light-years
• C) galaxies that have a Type Ia supernova explosion in them
• D) spiral galaxies
• E) galaxies that we are observing from right around the time of the big bang

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