Spiral Galaxies

Spiral Galaxies

Spiral galaxies are characterized by their flat, disk-like structure with arms that spiral outward from a central bulge. These arms are filled with young stars, gas, and dust, giving them a bright and dynamic appearance.

The Milky Way, our home galaxy, is a beautiful example of a spiral galaxy. Their iconic shapes are a result of rotation and gravity.

More About Spiral Galaxies

Spiral galaxies make up over 60% of the galaxies observed in the universe.
They are classified into Sa, Sb, and Sc types based on arm tightness and bulge size.
New stars are constantly forming in the spiral arms due to abundant gas and dust.
They usually have a dark matter halo extending beyond the visible stars.
Spiral galaxies can eventually evolve into elliptical ones through galactic collisions.