Daniel Fischer<p>Had the opportunity to visit a most fascinating solar <a href="https://scicomm.xyz/tags/observatory" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>observatory</span></a> Thursday in <a href="https://scicomm.xyz/tags/Switzerland" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Switzerland</span></a> near <a href="https://scicomm.xyz/tags/Arosa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Arosa</span></a>, the Astrophysikalisches Observatorium <a href="https://scicomm.xyz/tags/Tschuggen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Tschuggen</span></a> (AOT) which <a href="https://scicomm.xyz/tags/MaxWaldmeier" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MaxWaldmeier</span></a> had built in 1939, which was abandoned in 1980 and which amateur astronomers are now bringing back to the state just at that time: Here are the original Kern <a href="https://scicomm.xyz/tags/coronagraph" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>coronagraph</span></a> and another one from <a href="https://scicomm.xyz/tags/Zeiss" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zeiss</span></a> (with a huge spectrograph) it's sitting on. See <a href="https://www.facebook.com/media/set/?vanity=dan.fischer.393&set=a.10230945670040155" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">facebook.com/media/set/?vanity</span><span class="invisible">=dan.fischer.393&set=a.10230945670040155</span></a> for a picture album, with links to the background in the first comment.</p>