एक निश्चित पथ या कक्षा में सूर्य के चारों ओर पृथ्वी की गति को क्या कहा जाता है?

When does the entire Earth experience equal length of days and nights?

Which phenomenon occurs due to the Earth's revolution around the Sun?

It is June 21st and Aman is visiting the Arctic Circle. Which of the following conditions can he expect to experience?