进入百度网盘 会员中心 ，可以选择开通百度网盘会员，可以通过百度钱包、支付宝、微信支付、网银等多种方式购买开通。 百度网盘提供安全稳定的云存储服务，支持文件上传、下载、分享和管理，方便快捷。 A galaxy can contain hundreds of billions of stars and be many thousands of light-years across. Our own galaxy , the Milky Way, is around 100,000 light-years in diameter. What Is a Galaxy? The Short Answer: A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems , all held together by gravity. We live on a planet called Earth that is part of our solar system. But where is our solar system? It’s a small part of the Milky Way Galaxy.
