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The _______________ model explains pulsars using beams of radiation that sweep around the sky.
Q2: Granulation is evidence that energy in the
Q17: The collapse of the iron core of
Q18: A galaxy that has created a large
Q21: Explain the steps involved in clearing a
Q27: Globular clusters can be used to measure
Q27: The _ universe hypothesis predicts a sudden,
Q50: _ are cool, with temperatures of about
Q52: Pulsars were discovered because they _.<br>A) provide
Q57: Galactic collisions _.<br>A) are very rare, since
Q68: Normal galaxies in the present never went