nemfrog: “Phases of Mercury (left) and Venus. Di͡e͡tskai͡a͡ ėnt͡s͡iklopedīi͡a͡. 1913. Internet Archive ”
Jul 02nd321 notesHighResnemfrog

nemfrog:

Phases of Mercury (left) and Venus. Di͡e͡tskai͡a͡ ėnt͡s͡iklopedīi͡a͡. 1913. 

Internet Archive