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

Question

Quizplus · Accepted Answer

A T Tauri star is a young star in its protostar phase, just before it enters the main-sequence phase. These stars are still accreting mass from their surrounding disks and are not yet in hydrostatic equilibrium.

A T Tauri Star Is at What Stage of Its