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Violent impacts of infalling particles release energy called ____________.
Q2: Good tracers of the spiral arms of
Q11: Comets falling into the inner solar system
Q12: The graph below plots the escape velocity
Q21: Regions of compression that move at their
Q43: Outside the ice line the temperatures are
Q49: In the edge-on sketch of a spiral
Q69: Debris disks are cold dust disks around
Q77: The tail on the right side of
Q102: The diagram below shows a cross section
Q111: The initial high-temperature, high-density state from which