Figure 1. NGC 5866
Roughly 14% of all galaxies are classified as lenticulars, such as in Figure 1. These are similar to ellipticals in many ways.
  • They have elliptical forms.
  • The galactic boundaries are indistinct.
  • They are comprised mainly of old stars.
  • There is very little interstellar plasma.
  • The consistency of rotation varies with the aspect ratio.
For these reasons, many scientists consider lenticulars to be related to ellipticals, just with a higher aspect ratio. The main difference is that lenticulars have a distinct disc made of dust. This makes them similar to spiral galaxies, except that the dust is not organized into discrete lanes.

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