A T Tauri star is:
A) an intermediate mass protostar near the end of its pre-main-sequence lifetime.
B) a young, massive O or B star.
C) a low-mass protostar embedded in a cocoon of dust clouds.
D) a high-mass protostar surrounded by a rotationally flattened disk of gas and dust.
Correct Answer:
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Q58: In the Hertzsprung-Russell diagram, how does the
Q59: Some protostars, when they evolve onto the
Q60: Some protostars, when they evolve onto the
Q61: Those interior regions of a protostar that
Q62: T Tauri stars are at what stage
Q64: A Herbig-Haro object is:
A)the gas cloud produced
Q65: Herbig-Haro objects are:
A)dense dust clouds surrounding and
Q66: Herbig-Haro objects, bright, variable regions within nebulae,
Q67: Typical jets of bipolar outflow last for:
A)10
Q68: What is a proplyd?
A)a protoplanetary disk around
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