Multiple Choice
Brown dwarfs are considered failed stars because
A) fusion never begins in their cores.
B) they never reach masses larger than 50 Jupiter masses.
C) convection never plays a role in their energy transport.
D) they primarily shine at infrared wavelengths.
Correct Answer:

Verified
Correct Answer:
Verified
Q45: The interstellar medium is divided up into
Q54: The dust in the interstellar medium comes
Q55: What happens as a protostar contracts?<br>A) Its
Q56: A surprising fact about a <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB4068/.jpg"
Q58: Warm ionized gas in the interstellar medium
Q58: Some molecular clouds have so much internal
Q60: Sitting in a 100°F hot tub feels
Q61: Interstellar clouds are<br>A) hydrogen gas,condensed out of
Q63: We detect neutral gas in the interstellar
Q70: Why can't very bright protostars be seen