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The Crab Nebula is an important test of our ideas about supernova explosions because
Q14: Density,temperature,and pressure increase as you move inward
Q22: Magnetic fields in the Milky Way are
Q24: In the early universe,which type of particle
Q34: Explain how pictures such as the one
Q35: List the following H-R diagrams from oldest
Q50: We find that interstellar gas and the
Q51: Describe two modern-day (within the past 150
Q54: The spectra of most galaxies tell us
Q66: The Lyrid meteor shower occurs every year
Q73: Name two predictions of the standard Big