A protostar becomes a main sequence star when it ________________.
A) starts fusing helium
B) starts fusing hydrogen to helium
C) starts fusing heavier elements
D) starts glowing with infrared light
Correct Answer:
Verified
Q6: Brown dwarfs are
A) large terrestrial planets.
B) objects
Q7: When do we say that a star
Q8: What stars form the slowest?
A) O and
Q9: Protostars shine brightest in
A) radio waves.
B) infrared
Q10: The Sun formed from the gravitational collapse
Q12: The typical temperature of an interstellar cloud
Q13: Protostars are observable by radio telescopes but
Q14: A _ is a region where jets
Q15: In the H-R diagram a T Tauri
Q16: A protostar is not _.
A) producing energy
B)
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