an hour-long period

timetable

astronomical (relating to astronomy) / astronomical (vast)

astronomer

Kyūjitai form of 双方向: two way, interactive

a bad sense of direction / one who has a bad sense of direction

direction

(aeronautics) rudder (control surface of an aircraft)

earth, land, ground / a place, a region, a piece of land / territory, dominion / (of a crate, etc.) the bottom / (printing, of a page) the bottom margin

earth; ground