Html+Css实现九大行星动画效果

好的，我可以为您提供一些基本的代码示例来实现九大行星动画效果。以下是HTML和CSS代码示例：

HTML代码：

<div class="container">
  <div class="sun"></div>
  <div class="mercury"></div>
  <div class="venus"></div>
  <div class="earth"></div>
  <div class="mars"></div>
  <div class="jupiter"></div>
  <div class="saturn"></div>
  <div class="uranus"></div>
  <div class="neptune"></div>
</div>

CSS代码：

.container {
  position: relative;
  width: 600px;
  height: 600px;
  margin: 0 auto;
}

.sun {
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -50px;
  margin-left: -50px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: #FFCE00;
  animation: spin 10s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.mercury {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #C2B280;
  animation: orbit 2s linear infinite;
}

.venus {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -15px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: #E6D6AD;
  animation: orbit 4s linear infinite;
}

.earth {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -25px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: #3F4F5F;
  animation: orbit 6s linear infinite;
}

.mars {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -35px;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background-color: #E45F56;
  animation: orbit 8s linear infinite;
}

.jupiter {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -50px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: #E1B80D;
  animation: orbit 10s linear infinite;
}

.saturn {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -65px;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background-color: #E1B80D;
  animation: orbit 12s linear infinite;
}

.uranus {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -85px;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background-color: #9BC4E2;
  animation: orbit 14s linear infinite;
}

.neptune {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -100px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background-color: #6384B3;
  animation: orbit 16s linear infinite;
}

@keyframes orbit {
  from {
    transform: rotate(0deg) translate(150px) rotate(0deg);
  }
  to {
    transform: rotate(360deg) translate(150px) rotate(-360deg);
  }
}

以上代码将会在一个 600px x 600px 的容器内展示太阳系中的九大行星，每个行星都有自己的轨道和大小。太阳会以线性方式旋转，而行星则会沿着其轨道以相同的线性速度运动。请注意，上面的CSS代码中的动画效果仅适用于最新版本的现代浏览器，而在旧版浏览器中可能会有兼容性问题。