What process is responsible for the formation of a new star?
A) The collision of one or more stars
B) The collapse of part of a cloud of interstellar material
C) The gathering of material around a black hole
D) The collision of massive planets in interstellar space
Correct Answer:
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Q8: According to nebular theories,the planets formed from
Q9: The contraction of a gaseous cloud out
Q10: The H-R diagram of a cluster shows
Q11: Which of the following clusters is the
Q12: If nebular theories of the origin of
Q14: As an interstellar cloud collapses to become
Q15: What is the evolutionary status of a
Q16: What were planetesimals?
A)Interplanetary grains
B)Bodies,as massive as the
Q17: The solar system
A)Took several billion years to
Q18: Which of the following is not easily
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