Lenticular galaxies, like this one called Mrk 820, are in the transition zone between elliptical and spiral galaxies. A closer look at the appearance of Mrk 820 reveals hints of a spiral structure embedded in a circular halo of stars.
Surrounding Mrk 820 in this image is a good sampling of other galaxy types, both elliptical and spiral. Most of the smears and specks are distant galaxies, but the prominent bright object at the bottom is a foreground star called TYC 4386-787-1.
Image credit: ESA/Hubble & NASA and N. Grogin (STScI), Acknowledgement: Judy Schmidt
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