What feature specifically identifies a barred spiral galaxy?

Answer

It possesses a central bar structure made of stars stretching across the nucleus

Barred spiral galaxies are distinguished from regular spirals by having a central bar structure composed of stars that extends outward from the nucleus before the spiral arms begin to wind.

What feature specifically identifies a barred spiral galaxy?

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Types of Galaxies in Space - Spiral, Elliptical, Irregular plus more

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