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Where did comets that are now in the Kuiper belt originally form?
Q12: Which of the following statements about apparent
Q21: Which best describes the composition of the
Q47: What is the purpose of the European
Q49: The first planets around other Sun-like stars
Q81: Dawn images of Vesta show that it
Q89: Which process is the primary source of
Q96: The total amount of power (in watts,for
Q96: What would happen to Earth if we
Q119: Which of the following is not a
Q121: Based on its surface features,the most important