Galaxy News

A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, gas, dust, and dark matter. Galaxies range in size from dwarfs with just a few billion stars to giants with one hundred trillion stars, each orbiting its galaxy’s center of mass. They come in various forms, including spiral galaxies with flat, rotating disks and prominent arms; elliptical galaxies, which are more rounded and featureless; and irregular galaxies, which lack a distinct shape. The Milky Way, our own galaxy, is a spiral galaxy. Galaxies are not only fundamental to our understanding of the universe but also to the study of cosmology as they host the life cycles of stars and the ecological balance of interstellar matter.