An Astronomer with Astrolabe and a TelescopeA print after a French 13th century manuscript (now in the Bodelian Library, Oxford). Despite the title given, the man is actually holding a sighting tube rather than a telescope. By the 4th century BC, sighting tubes were known to be of use in observing the stars and planets, since they helped to eliminate extraneous light.<br>
An Astronomer
<div class="fn value">
W.B. Rye</div>
1854<div style="display: none;">date QS:P571,+1854-00-00T00:00:00Z/9</div>
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