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Q27: The equinoxes are located at the intersections
Q34: The evolution of a star is controlled
Q51: In determining the distance to a galaxy
Q53: Name the periods of the Paleozoic era
Q54: Starburst galaxies occur when a rapid and
Q55: By analyzing a star's spectra,the chemical composition,the
Q60: Which of the following does NOT describe
Q71: _ metamorphism will occur where two blocks
Q81: The Moon rotates around its own axis
Q104: For which objects in the universe has