html - 在 CSS 中创建星空背景

Question

我正在用纯代码制作一个太阳系网站，不使用任何图像。问题是我不知道如何在背景中获得星星。我试图在黑色背景上得到类似黄色展开的圆点图案的东西。这是我的代码(为所有其他星球重复 div 和样式)。

html,
body {
  width: 100%;
  height: 100%;
  background-color: black;
}
#sun {
  position: absolute;
  top: 50%;
  left: 50%;
  height: 200px;
  width: 200px;
  margin-top: -100px;
  margin-left: -100px;
  border-color: orange;
  border-width: 2px;
  border-style: solid;
  border-radius: 50%;
  box-shadow: 0 0 64px yellow;
  background-color: yellow;
}
#mercury {
  position: absolute;
  top: 0;
  left: 50%;
  height: 10px;
  width: 10px;
  margin-left: -5px;
  margin-top: -5px;
  border-radius: 50%;
  background-color: #ffd9b3;
}
#mercury-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 260px;
  height: 260px;
  margin-top: -130px;
  margin-left: -130px;
  border-width: 2px;
  border-style: dotted;
  border-color: white;
  border-radius: 50%;
  -webkit-animation: spin-right 22s linear infinite;
  -moz-animation: spin-right 22s linear infinite;
  -ms-animation: spin-right 22s linear infinite;
  -o-animation: spin-right 22s linear infinite;
  animation: spin-right 22s linear infinite;
}
@-webkit-keyframes spin-right {
  100% {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes spin-right {
  100% {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

<div id="sun"></div>
<div id="mercury-orbit">
  <div id="mercury"></div>
</div>

Answer 1

来自 this ，一个美好的星夜。

background-color:black;
background-image:
radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px),
radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 40px),
radial-gradient(rgba(255,255,255,.4), rgba(255,255,255,.1) 2px, transparent 30px);
background-size: 550px 550px, 350px 350px, 250px 250px, 150px 150px; 
background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;