Editing Leiden Observatory (section)

=== Einstein's Chair in the Ten-inch dome ===

[[File:Einsteinchair.jpg|thumb|Einstein's Chair]]
Einstein's Chair is an astronomical observing chair at the Leiden Observatory. This chair, made in 1861, is the only piece of furniture in the observatory that dates from that time. The chair gets its name from the fact that it was used by [[Albert Einstein]] on several occasions during his visits to the observatory. Einstein was a frequent visitor of the building during his professorship at Leiden University due to his good friendship with the director, [[Willem de Sitter]]. The chair can be found in the largest dome of the observatory, the so-called 10-inch dome (named after the 10-inch telescope that is placed inside). The chair is still used by observers and a popular attraction at the observatory.

On 21 October 2015, Einstein's Chair got a short segment on the Dutch astronomy program ''Heel Nederland Kijkt Sterren''. During this segment the science populariser [[Govert Schilling]] and the science historian David Baneke talked about its origins.<ref>[http://www.npo.nl/heel-nederland-kijkt-sterren/21-10-2015/POW_01507545 Heel Nederland Kijkt Sterren] on a Dutch VOD website</ref><ref>{{cite journal | title = Investigations into the origin of Einstein's Sink | journal = Studium | year = 2019 | volume = 11 | issue = 4 | pages = 260–268 | doi=10.18352/studium.10183| last1 = Pietrow | first1 = Alexander G.M. | doi-broken-date = 1 November 2024 | arxiv = 1905.09022 | bibcode = 2019Studi..11E...1P | doi-access = free }}</ref>

Einstein is noted for his visits to Leiden Observatory during World War I.<ref>{{Cite journal|last=Delft|first=Dirk van|date=2007-01-12|title=Albert Einstein in Leiden|journal=Physics Today|language=en|volume=59|issue=4|pages=57–62|doi=10.1063/1.2207039|issn=0031-9228}}</ref>