I built this using three.js/webgl with data from NASA CAMS (<a href="http://cams.seti.org/" rel="nofollow">http://cams.seti.org/</a>). Just updated it with meteoroid data from last year.<p>It's open source: <a href="https://github.com/typpo/showers" rel="nofollow">https://github.com/typpo/showers</a>