# astronomy scientistoftheday histstm sciart 16c histsci onthisday astronomer ursamajor perseus

Andreas Cellarius, the German/Dutch cartographer responsible for one of the most beautiful books ever published (Harmonia Macrocosmica, 1661), is 's

https://t.co/aOw7w6De15

5 12
2021-10-25

Just wrapped up my second rare book presentation of the week, focusing on the history of in the Middle East and East Asia.

Many thanks to & for their assistance identifying some top-notch titles for tonight's discussion!

7 28
2021-04-16

Astronomical rings were made popular by Dutch instrument maker Gemma Frisius. Simple & ingenious, they identify the meridian when the rings' shadows come together. These rings were made by Frisius' nephew in 1567.

https://t.co/yExra3XFSF

36 72
2020-08-28

Thomas Hornsby was baptised in 1733.

Hornsby was an at who petitioned for the construction of the Radcliffe Observatory (now part of College).

This aquatint by J. Bluck after F. Mackenzie shows its interior.

3 17
2020-08-27

We move on now to perhaps the most famous astronomical card game: Urania's Mirror!

has a complete set of these beautifully illustrated cards. Learn more about it here: https://t.co/dyytRPYb1Q


0 1
2020-06-13