效果如下：
代码如下：
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> body{ background: #000; } .sun{ width: 100px; height: 100px; position: absolute; top: 50%; left: 50%; margin-left: -50px; margin-top: -50px; /*保证居中*/ transform: translate(-50%;-50%); background: yellow; border-radius: 50%; box-shadow: 0 0 30px 3px gold; } .earth{ width: 350px; height: 350px; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); border:1px solid #ccc; border-radius: 50%; /*animation: whirl 5s linear infinite;*/ } .earth::before{ content: ""; width: 40px; height: 40px; position: absolute; top: 50%; left: 0; transform: translate(-50%,-50%); background: #54A6D5; border-radius: 50%; } .moon{ width: 100px; height: 100px; position: absolute; left: 0; top: 50%; transform: translate(-50%,-50%); border-radius: 50%; /*border:1px solid #ccc;*/ animation: whirl 5s linear infinite; } .moon::before{ content: ""; width: 15px; height: 15px; position: absolute; left: 0; top: 50%; transform: translate(-50%,-50%); border-radius: 50%; background: #F8EDBB; } .venus{ width: 500px; height: 500px; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); border:1px solid #ccc; border-radius: 50%; animation: whirl 8s linear infinite; } .venus::before{ content: ""; width: 30px; height: 30px; position: absolute; left: 0; top: 50%; transform: translate(-50%,-50%); background: #17F056; border-radius: 50%; } .jupiter{ width: 600px; height: 600px; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); border-radius: 50%; border:1px solid #ccc; animation: whirl 10s linear infinite; } .jupiter::before{ content: ""; width: 35px; height: 35px; position: absolute; top: 50%; left: 0; transform: translate(-50%,-50%); border-radius: 50%; background: red; } @keyframes whirl{ 0%{ transform: translate(-50%,-50%) rotate(0deg); } 100%{ transform: translate(-50%,-50%) rotate(360deg); } } </style> </head> <body> <div class="sun"></div> <div class="earth"> <div class="moon"></div> </div> <div class="venus"></div> <div class="jupiter"></div> </body> </html>