What Is Galaxy
A galaxy is a vast system of stars, stellar remnants, interstellar gas and dust, and dark matter, all bound together by gravity. They come in various shapes and sizes, ranging from relatively small dwarf galaxies to immense spiral and elliptical galaxies. Our own galaxy, the Milky Way, is a barred spiral galaxy containing billions of stars, including our Sun, and spans a diameter of about 100,000 light-years. Galaxies are the building blocks of the universe, and they can be found throughout the \ Galaxies are broadly categorized into several types based on their shapes and characteristics. The main types of galaxies are: 1.Spiral Galaxies: These galaxies have a distinctive spiral structure, with arms spiraling out from a central nucleus. The Milky Way is an example of a spiral galaxy. 2.Elliptical Galaxies: Elliptical galaxies are shaped like ellipsoids or spheres, lacking the spiral arms of spiral galaxies. They contain older stars and typically have less interstellar gas and dus...
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