pedestrian-only street, pedestrian mall

(literally) above heaven and under heaven / (figuratively) the whole world or universe

(Chinese mythology, Japanese mythology) the beginning of the world; when the world began; when the world was created

an Emperor or Empress (regnant) of Japan / (usually in Chinese contexts) an emperor, ruler, or other monarch with a heavenly mandate

exhibition

(astronomy) radio astronomy

astronomical (relating to astronomy) / astronomical (vast)

used for "spaces" in transcriptions, or as other separators

(linear algebra) transposed matrix

astronomer