When earth is located you on the orbital position shown two constellations that are both visible to an observer on earth at midnight are

Gemini and Taurus,

are the two constellations that are both visible to an observer on earth at midnight.

Themes; subfields is the answer

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.