0H

导航
0G 0H 0I
1H
0H - H0

0H（zero H）或0-H可以指：

  • 0h，零小时的記號
  • 0h，春分子午線（spring equinox meridiator）中天球經度為0°（±0°）的部份；參見赤经

參見

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