These images are full of information but they are not true color images, they are false color images. Galaxies Unlike stars, galaxies appear as recognizable shapes in Hubble telescope images. On the average, galaxies contain a hundred billion stars. The stars glow with light powered by nuclear fusion in their cores. The gas glows when excited by starlight and the dust reflects starlight in which case it appears white or blocks it appearing dark.
Spiral galaxies look like pinwheels.
They have curving arms, called spiral arms, wound around their center. Often there is a spherical central bulge of stars. Our Milky Way galaxy is a spiral galaxy. The spiral arms are waves of star formation swirling around the galaxy. The new young stars are hot and bright, they light up the gas and dust in the arms.