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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <div class="stars"></div>

<div class="planet">
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="face">
    <div class="eye"></div>
    <div class="eye"></div>
    <div class="mouth"></div>
  </div>
</div>

<div class="planet moon">
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="crater"></div>
  <div class="face">
    <div class="eye"></div>
    <div class="eye"></div>
    <div class="mouth"></div>
  </div>  
</div>
!

CSS 

              
                :root {
  --planet-size: 40vw;
  --planet-color: #007cda;
  --moon-size: 9vw;
  --moon-color: #fff;
}

.planet {
  font-size: var(--planet-size);
  color: var(--planet-color);
  display: flex;
  justify-content: center;
  align-items: center;
  width: 1em;
  height: 1em;
  background-color: currentColor;
  box-shadow: inset -0.15em 0 rgba(0,0,0,0.1);
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.crater {
  font-size: 0.1em;
  opacity: 0.6;
  display: block;
  width: 1em;
  height: 1em;
  background-color: currentColor;
  box-shadow: inset 0 0 0 1em rgba(0,0,0,0.03), inset 0.25em 0 rgba(0,0,0,0.07);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
}

.crater:nth-of-type(1) {
  font-size: 0.14em;
  transform: translateX(0.55em) translateY(-2.5em);
}

.crater:nth-of-type(2) {
  font-size: 0.1em;
  transform: translateX(-0.4em) translateY(-3.8em);
}

.crater:nth-of-type(3) {
  font-size: 0.12em;
  transform: translateX(-3.1em) translateY(-1.7em);
}

.crater:nth-of-type(4) {
  font-size: 0.16em;
  transform: translateX(-2.9em) translateY(0.6em);
}

.crater:nth-of-type(5) {
  font-size: 0.12em;
  transform: translateX(-2em) translateY(1.5em);
}

.crater:nth-of-type(6) {
  font-size: 0.18em;
  transform: translateX(0.9em) translateY(1.3em);
}

.face {
  display: flex;
  font-size: 0.2em;
  width: 2em;
  height: 1.4em;
  flex-flow: row wrap;
}

.eye {
  width: 0.35em;
  height: 0.35em;
  border-radius: 50%;
  background: black;
  margin: 0.5em auto 0.1em;
}

.mouth {
  width: 1em;
  height: 0.3em;
  background: black;
  margin: 0 calc((2em - 0.55em) / 2);
  border-radius: 0.6em 0.5em 1.5em 1.5em;
  position: relative;
}

.mouth::before {
  width: 50%;
  height: 30%;
  display: block;
  content: ' ';
  background-color: #ff8800;
  border-radius: 50% / 100% 100% 50% 50%;
  position:absolute;
  top: 50%;
  left: 50%;
  transform: translateY(-10%) translateX(-50%);
}

.moon {
  font-size: var(--moon-size);
  color: var(--moon-color);
  position: absolute;
  top: calc(50% - (var(--moon-size) / 2));
  left: calc(50% - (var(--moon-size) / 2));
  transform: translateY(calc(var(--planet-size) * 0.3)) translateX(calc(var(--planet-size) * -0.4));
  animation: orbit 4s ease-in-out forwards infinite;
}

.moon .face {
  font-size: 0.4em;
}

.moon .mouth::before {
  content: none;
}

@keyframes orbit {
  0% {
    transform: translateY(calc(var(--planet-size) * 0.3)) translateX(calc(var(--planet-size) * -0.4));
    z-index: 2;
    opacity: 1;
  }
   50% {
    z-index: 2;
    opacity: 1;
  }
  51% {
    opacity: 0.9;
    z-index: 0;
    transform: translateY(calc(var(--planet-size) * -0.3)) translateX(calc(var(--planet-size) * 0.4));
  }
  99% {
    opacity: 0.9;
    z-index: 0;
  }
  100% {
    opacity: 1;
    z-index: 2;
    transform: translateY(calc(var(--planet-size) * 0.3)) translateX(calc(var(--planet-size) * -0.4));
  }
}

.stars {
  height: 10px;
  width: 10px;
  border-radius: 50%;
  position: absolute;
  background-color: white;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
  box-shadow: 
    130px 270px 0 -1px white,
    310px 60px 0 -1px white,
    -340px 175px 0 -3px white,
    -610px 1205px 0 -4px white,
    500px 450px 0 -3px white, 
    -500px 125px 0 1px white,
    -150px -615px 0 -2px white,
    -110px -370px 0 -1px white,
    -440px -175px 0 -3px white,
    -610px -205px 0 -4px white,
    410px -450px 0 -3px white, 
    390px -125px 0 -2px white,
    50px -250px 0 -1px white,
    30px -170px 0 -1px white,
    380px 375px 0 -5px white,
    -710px 705px 0 -6px white,
    470px -650px 0 -3px white, 
    -450px 425px 0 1px white,
    550px -205px 0 -5px white,
    210px 50px 0 -1px white,
    -240px 275px 0 -5px white,
    -510px 120px 0 -4px white,
    600px 550px 0 -3px white, 
    -400px 225px 0 1px white,
    -250px -515px 0 -2px white,
    -310px -170px 0 -4px white,
    -340px -275px 0 -4px white,
    -510px -305px 0 -5px white;
}
!

JS
!
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