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Galactic _______________ describes the process of a large galaxy absorbing a smaller one.
Q2: How much time after the Big Bang
Q4: Can there be life on Mars? Is
Q23: How common are supernova events in our
Q27: Giant and supergiant stars are rare because
Q55: Which one of the following is a
Q58: It is possible for a medium-mass star
Q63: Ordinary matter makes up approximately _ percent
Q105: Because of the problem of scarcity, the
Q108: What is the unified model of active
Q111: Which of the following is an example