Brown dwarfs are objects with insufficient mass to sustain nuclear fusion in their cores. Although they have characteristics similar to stars, they did not have enough mass to ignite nuclear fusion in their cores and therefore do not emit significant amounts of light and heat like stars.

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Brown Dwarfs Are

Question 34

Multiple Choice

Brown dwarfs are

A) stars in the process of forming
B) very cool, low mass stars of spectral type M
C) the burnt out cores of dead stars
D) objects with insufficient mass to sustain nuclear fusion in their cores

Correct Answer: