Skip to main content

"The Great Refractor of the Astrophysical Observatory Potsdam (AOP), Germany; it was finished in 1899."

H. Raab (User:Vesta), CC BY-SA 4.0, via Wikimedia Commons.

#telescope
#telescope

Lo, thar be cookies on this site to keep track of your login. By clicking 'okay', you are CONSENTING to this.

⇧