History of the Milkey Way galaxy
The Wonders of the Galaxy: A Journey Through the Universe
A massive system of stars, gas, dust, and dark matter that is held together by gravity is called a galaxy. One of the billions of galaxies in the universe is the Milky Way, which includes our own planet Earth. Galaxies come in a variety of sizes and shapes. Spiral, elliptical, and irregular are the three primary types. Spiral galaxies, like the Milky Way, have beautiful arms that wind around a central bulge. Elliptical galaxies typically contain more mature stars and have a more rounded shape. Irregular galaxies, as the name suggests, have no fixed shape and can look chaotic.