Birr

Places in this region

Leviathan of Parsonstown

Behemoth, cannon-like telescope operated by generations of Irish earls

The real measure of a telescope's power is not how greatly it can magnify a distant object, but what portion of that object's light the instrument actually collects. It's easy if you think of... »

Inspired Inventions, Instruments of Science, Retro-Tech | Edited by Trevor, wythe and 3 others