What is Milky Way?
Milky Way Galaxy
The Milky Way is a large spiral galaxy that contains our solar system, along with billions of other stars and their planets. It is shaped like a flat disk with a central bulge and is part of the universe we observe.
Overview
The Milky Way is a vast collection of stars, gas, dust, and dark matter, all held together by gravity. It is estimated to contain over 100 billion stars, including our own Sun. The galaxy is shaped like a spiral, with arms that extend outward, creating a beautiful structure that can be seen in the night sky as a band of light. This galaxy works by the gravitational forces that keep stars in orbit around the center, where a supermassive black hole resides. The stars and other materials move in complex paths, influenced by the mass of the galaxy itself. For example, our solar system orbits the center of the Milky Way at a speed of about 230 kilometers per second, taking roughly 230 million years to complete one orbit. Understanding the Milky Way is crucial for astronomers as it helps us learn about the formation and evolution of galaxies. It serves as a reference point for studying other galaxies in the universe. Observations of the Milky Way have led to discoveries about dark matter and the overall structure of the cosmos.