Caption: A cartoon of the 3 main galaxy types of the Hubble sequence (of galaxy types) which is the most usual/traditional galaxy classification scheme.
Features:
Note we are using the expression
local universe
vaguely here since yours truly has NOT tracked
down exactly what the reference
FK-582 uses for
local universe.
One can't do everything---sometimes there's
A Bridge too Far (1974).
For a discussion of the meaning of
local universe, see
Specifying the Local Universe Vaguely and Precisely.
In fact, the 3
subtypes are just ideal cases along a
continuum from
zero
galactic bar
to large galactic bar.
If one says spiral galaxies without
qualification one can mean either
unbarred spiral galaxies or
spiral galaxies with
any degree of
galactic bar.
Context must decide the meaning.
Actually, galaxies with
galactic bars are best
since you can get a drink.
For comparison, consider the
non-dwarf galaxy the
Milky Way (M_* ∼ 5*10**10 M_☉,
10**12 M_☉: estimates c.2025)
(Wikipedia: Milky Way: Mass).