The Sudbury Neutrino telescope in Canada. The 12-meter sphere contains 12,000 detectors that watch for the light from neutrinos that streak through the water filling the interior of the sphere. (Courtesy - Stanford Solar Center)
This image appears in the #59: Where did all the Neutrinos go? Technology Through Time article.
On April 8, 1947, the largest sunspot in modern history reached its maximum size of over 330 times Earth's area.