Loose spiral galaxies are a type of spiral galaxy, whose spiral arms appear to be "loose".

Whereas Sa and Sb galaxies have their spiral arms close and thin, Sc galaxies appear to have free-flowing, thicker arms and SBc galaxies have many thin arms.

SBa and SBb galaxies have arms that take a sharp turn, from going straight out and into a circular manner.

Galactic Classes
E · S0 · Sa · Sb · Sc · Sd · Sm · Irr
dSph · dE · dIrr
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