Earth orbit CSS animation

earth-orbit-css-animation.markdown

Earth orbit CSS animation

Learning about css animations

A Pen by Turqueso on CodePen.

License.

index.html

<div class="stars"></div>
<!-- Right below is an image of the sun -->
<div id="sun"></div>
  <!-- Insert the 'earth' on the next line -->
   <div id="earth-orbit">
     <div id="earth"></div>
       <div id="moon-orbit">
         <div id="moon"></div>
         </div>
   </div>
     
   
     
     

script.js

var siteWidth = $(window).width();
for (i = 0; i <= 100; i++) {
  var start = $('<div>')
  .addClass('star star_'+i)
  .css({
    top: Math.floor(Math.random()*500),
    left: Math.floor(Math.random()*siteWidth)
  })
  .appendTo('.stars');
}

scripts

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

style.css

html, body {
    /* The universe takes up all available space */
    width: 100%;
    height: 100vh;
    overflow:hidden;
    
    /* The universe is black */
    background-color: black;
}

#sun {
    position: absolute;
    /* Positions the top-left corner of the image to be *
    /* in the middle of the box */
    top: 50%;
    left: 50%;
    
    /* Play with these numbers to see what it does */
    height: 200px;
    width: 200px;
    margin-top: -100px; 
    margin-left: -100px;
    
    border-color: orange;
    border-width: 1px;
    border-style: solid;
    border-radius: 50%;
    
    box-shadow: 0 0 128px red;
    background: yellow;
}

#earth {
    /* Style your earth */
    position: absolute;
    top: 0;
    left: 50%;
    
    height: 50px;
    width: 50px;
    margin-left: -25px;
    margin-top: -25px;
    
    border-color: blue;
    border-width: 0px;
    border-style: solid;
    border-radius: 50%;
    
    -webkit-box-shadow: 0px 0px 20px 0px rgba(255, 255, 255, 0.5);
-moz-box-shadow:    0px 0px 20px 0px rgba(255, 255, 255, 0.5);
box-shadow:         0px 0px 20px 0px rgba(255, 255, 255, 0.5);
  background: lightblue;
}

#earth-orbit {
    /* For Section #2 */
    position: absolute;
    top: 50%;
    left: 50%;

    width: 650px;
    height: 500px;
    margin-top: -250px;
    margin-left: -250px;

    border-width: 0px;
    border-style: dotted;
    border-color: white;
    border-radius: 50%;
    
    -webkit-animation: spin-right 10s linear infinite;
     -moz-animation: spin-right 10s linear infinite;
      -ms-animation: spin-right 10s linear infinite;
       -o-animation: spin-right 10s linear infinite;
          animation: spin-right 10s linear infinite;
}

#moon {
    /* Style your earth */
    position: absolute;
    top: 0;
    left: 50%;
    
    height: 20px;
    width: 20px;
    margin-left: -25px;
    margin-top: -25px;
    -webkit-border-radius: 15px;
    -moz-border-radius: 15px;
    border-radius: 15px;
    
    -webkit-box-shadow: 1px 1px 16px 0px rgba(255, 255, 255, .6);
-moz-box-shadow:    1px 1px 16px 0px rgba(255, 255, 255, .6);
box-shadow:         1px 1px 16px 0px rgba(255, 255, 255, .6);
  background: lightgray;
}

#moon-orbit {
    /* For Section #2 */
    position: absolute;
    top: 50%;
    left: 50%;

    width: 110px;
    height: 80px;
    margin-top: -285px;
    margin-left: -45px;

    border-width: 0px;
    border-style: dotted;
    border-color: white;
    border-radius: 50%;
    
    -webkit-animation: spin-right 10s linear infinite;
     -moz-animation: spin-right 10s linear infinite;
      -ms-animation: spin-right 10s linear infinite;
       -o-animation: spin-right 10s linear infinite;
          animation: spin-right 10s 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);
  }
}

.stars {
  background-color: black;
  width: 100%;
  height: 100%;
  display: block;
}
.star {
    width: 2px;
    height: 2px;
    border-radius: 50%;
    border-top-left-radius: 50%;
    border-top-right-radius: 50%;
    border-bottom-left-radius: 50%;
    border-bottom-right-radius: 50%;
    background-color: white;
    position: absolute;
    left: 40px;
    top: 40px;
    -webkit-shadow: 0 0 8px 2px rgba(255,255,255,0.6);
    -moz-shadow: 0 0 8px 2px rgba(255,255,255,0.6);
    box-shadow: 0 0 8px 2px rgba(255,255,255,0.6)
    animation: star 4s infinite;
    -webkit-animation: star 4s infinite; /* Safari and Chrome */
}

@keyframes star
{
0% {opacity: 0.2;}
50% {opacity: 1;}
100% {opacity: 0.2;}
}

@-webkit-keyframes star
{
0% {opacity: 0.2;}
50% {opacity: 1;}
100% {opacity: 0.2;}
}