satellites/index.html at master · abbeyj/satellites · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Satellites</title>
    <style>
        body {
            background-color: #FFB794;
        }
        div#container {
            display: flex;
            flex-wrap: wrap;
        }
        div.box {
            margin: 10px;
        }
    </style>
</head>
<body>
    <div id="container">
        <div class="box">
            <h1>Satellites</h1>
            <canvas id="satellites" width="800" height="800" style="background-color: black">
                Your browser doesn't support the HTML canvas element.
            </canvas>
            <div>Number of satellites: <span id="count"></span></div>
            <div>Satellites destroyed: <span id="count_destroyed"></span></div>
        </div>
        <div class="box" style="margin-top: 30px; flex: 1; min-width: 320px">
            <h2>About</h2>
            <div>I always enjoyed playing with the <a href="http://www.colorado.edu/physics/2000/applets/satellites.html">Physics 2000 Satellites applet</a>.
            But now it is hard to use since many people don't have Java installed and the applet is broken with modern versions of Java.  So I recreated it from scratch using <tt>&lt;canvas&gt;</tt>
            and JavaScript.</div>
            <h2>Instructions</h2>
            <div>Click to place a satellite.  Click and drag to give it a push.</div>
            <h2>Things to explore</h2>
            <div>
            <ul>
                <li>Can you get a satellite into orbit around the Earth?</li>
                <li>Is it easier to get something in orbit close to the Earth or farther away?</li>
                <li>Is there a difference in difficulty in getting sallellites orbiting clockwise vs. counter-clockwise?</li>
                <li>Can you get a satellite into orbit around the Moon?</li>
                <li>What happens to satellites orbiting around Earth at approximately the same distance as the Moon?</li>
                <li>Can you start a satellite outside of the Moon's orbit and have it settle into an orbit inside the Moon's orbit?  Why or why not?</li>
            </ul>
            </div>
        </div>
    </div>
    <script src="satellites.js"></script>
    <a href="https://github.com/abbeyj/satellites"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://camo.githubusercontent.com/365986a132ccd6a44c23a9169022c0b5c890c387/68747470733a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f7265645f6161303030302e706e67" alt="Fork me on GitHub" data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_red_aa0000.png"></a>
</body>
</html>