BULGARIA-Mercury Transit, Bulgaria
Astronomers and visitors observe planet Mercury transit near the Black sea town of Varna east of the Bulgarian capitas Sofia, Nov. 11, 2019. The planet Mercury passes? between Earth and the Sun in an event that won't happen again for another thirteen years. During this transit, Mercury is visible as a tiny pinprick of darkness against the Sun's surface.The transit started at 7:35 AM for about five and a half hours. Photo by: Petar Petrov /Impact Press Group/