Except for the Local Group, galaxies seem to be isolated and randomly in space.
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Q11: Compared to the spirals, elliptical galaxies tend
Q12: The most tightly wound spiral arms belong
Q13: Irregulars typically have very few blue stars.
Q14: Irr II galaxies may be the result
Q15: The Local Group of galaxies spans about
Q17: Among the ellipticals, E0 types look the
Q18: Unlike spirals, elliptical galaxies do not contain
Q19: Despite varying masses, all spiral galaxies look
Q20: There are more giant elliptical than dwarf
Q21: Active galaxies emit most of their radiation
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