Each circle indicates an exoplanet. 
<p>The circle colour indicates the method of discovery:
</p><p><span style="background:#000">o<span style="color:#B0C4DE">3846 planets discovered by this method = transit</span>o</span>
</p><p><span style="background:#000">o<span style="color:#FFC0CB"> 913 = radial velocity </span>x</span> 
</p><p><span style="background:#000">o<span style="color:#66CDAA">129 = microlensing </span>l</span> 
</p><p><span style="background:#000">a<span style="color:#F0E68C">58 = imaging </span>g</span>
</p><p><span style="background:#000">z<span style="color:#FA8072">48 = timing variations </span>t</span>
</p><p><span style="background:#000">c<span style="color:#FAFAD2">9 = brightness modulation </span>j</span> 
</p><p><span style="background:#000">r<span style="color:#F5F5F5">1 = astronomy </span>,</span>
</p><p><span style="background:#000">y<span style="color:#ADD8E6">1 = disk kinematics</span>b</span>
</p><p><span style="background:#FFFFFF"><span style="color:#000000"> = 5005 </span></span>
</p><p>The diameter of the circles indicates the orbit.
</p>
The approximately cross shaped block of colour is an accumulated density of circles.
<a href="https://en.wikipedia.org/wiki/NASA" class="extiw" title="w:NASA">NASA</a>/<a href="https://en.wikipedia.org/wiki/JPL-Caltech" class="extiw" title="w:JPL-Caltech">JPL-Caltech</a>/SYSTEM Sounds (M. Russo and A. Santaguida)
<a rel="nofollow" class="external free" href="https://www.jpl.nasa.gov/news/cosmic-milestone-nasa-confirms-5000-exoplanets">https://www.jpl.nasa.gov/news/cosmic-milestone-nasa-confirms-5000-exoplanets</a> (video only @ <a rel="nofollow" class="external free" href="https://www.youtube.com/embed/yv4DbU1CWAY">https://www.youtube.com/embed/yv4DbU1CWAY</a> (<a href="https://en.wikipedia.org/wiki/Youtube" class="extiw" title="w:Youtube">Youtube</a>))