All places on the same meridian have the same longitude.
在同一子有相同
经度。
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Much like how earth has a prime meridian marking for which universal coordinated time is based off of, Mars has a meridian that was first proposed way back in 1830 to be exact and is marked by a crater known as Airy-0.
就像地球上用来标记世界协调时间的本初子午线样,火星上的子午线最早是在 1830 年提出的,精确地说,火星上有
个被称
Air-0 的陨石坑。