This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Astronomische Nachrichten No Vorwort. Astronomische Nachrichten No Forward by Heinrich Christian Schumacher Astronomische Nachrichten Heinrich Christian Schumacher PDold Astronomische Nachrichten
Page 2023 Free-images.com. All images are Public Domain