Power spectrum of <a href="https://en.wikipedia.org/wiki/Cosmic_microwave_background_radiation" class="extiw" title="en:Cosmic microwave background radiation">CMB</a>.
NASA/WMAP Science Team
<p><a rel="nofollow" class="external text" href="http://lambda.gsfc.nasa.gov/product/map/dr2/m_images.cfm">Lambda - WMAP Images</a><br></p>
<a rel="nofollow" class="external text" href="http://lambda.gsfc.nasa.gov/product/map/dr2/map_images/PowerSpectrumExt2048.png">WMAP 3-year Power Spectrum</a>