An astronomer studying a distant cluster of galaxies finds that several of the galaxies are spiral shaped, with a nuclear region of moderate size and moderately wound arms. how should the astronomer classify these galaxies?

Sb

Astronomer Edwin Hubble invented a morphological classification of galaxies. According to its form, galaxies fall into four major types: spiral, barred spiral, elliptical and irregular. Spiral galaxies are the ones who have a bulge at the center and contains spiral arms. The galaxies that are spiral-shaped, with a nuclear region of moderate size and moderately wound arms are classified under Hubble classification as Sb.

when the chinese communist party took power in 1949, it began to build new di and levees to hold the yellow and yangtze rivers back.

answer called a epicycle;