D3 Examples - Planets

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg { width: 100%; height: 100%; }
  </style>
</head>
​
<svg>
 </svg>
​
<body>
  <script>
  var height = 600;
  var width = 100;
    
  var svg = d3.select('svg');
    
    for(var i = 0; i < 1500; i++){
    width = Math.random() *900;
    
    var data = {
        x: Math.random() * width,
        y: Math.random() * height,
      radius: Math.random() * 9 + 1,
      width:width
    };
    
    svg.append('circle')
     .datum(data);
    
  }
    
  console.log(data)
    
  svg.selectAll('circle')
    .attr('cx', function(d){    
          return d.x;
          })
    .attr('cy', function(d){
                    return d.y;
                    })  
    .attr('r', function(d){
                    return d.radius;
                })
    console.log(d3.selectAll('circle'))
  </script>
​
</body>
​
    