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A T Tauri star is at what stage of its stellar evolution?

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A T Tauri star is at what stage of its stellar evolution?

A T Tauri star is at what stage of its stellar evolution?
A)   Just before red-giant phase, when variability begins
B)   Well established on the main sequence
C)   At the end of its life, decaying away and cooling
D)   Protostar, before main-sequence phase

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Discovering the Universe

Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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