galaxisokat
Galaxies are vast systems of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity. They are the fundamental building blocks of the universe, with a typical galaxy containing hundreds of billions of stars. Galaxies come in various shapes and sizes, with the most common types being spiral, elliptical, and irregular.
Spiral galaxies are characterized by their flat, rotating disk with a central bulge, and prominent spiral arms.
Galaxies are not static; they evolve over time through processes such as star formation, supernova explosions,