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by denton-scratch 1022 days ago
A "progenitor" is an ancestor; it means that the quiescent galaxy "plausibly" turns into an elliptical galaxy.
1 comments
zuminator 1022 days ago
In this case precursor might be more precise than ancestor.
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denton-scratch 1022 days ago
Agreed; I knew there was something wrong with "ancestor" when I typed it.

[Edit] A progenitor is literally an ancestor; I answered GP's question. It's "progenitor" that should instead be "precursor", in the featured article.

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