Which range of elliptical classifications (E0-E7) is increasingly suspected by modern astronomers to consist of misclassified lenticular galaxies (S0)?
Answer
E4 through E7
Astronomers treat the highly elongated types, E4 through E7, with suspicion because spectroscopic observations often reveal they possess stellar disks, characteristic of lenticular galaxies, rather than the purely pressure-supported structure of classical ellipticals.
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