Greenwichn.格林威治（英国伦敦东南一市镇）Greenwich sidereal time格林尼治恒星时Greenwich apparent noon格林威治视正午Greenwich Meridian Time格林威治子午时Greenwich Sidereal Angle格林尼治恒星角Greenwich Meridian Transit格林威治子午线正中时Greenwich Conservatory Time格林威治守(存)时Greenwich astronomical time格林天文时Greenwich Royal Observatory皇家格林尼治天文台Greenwich mean astronomical格林尼治天文时Greenwich mean sidereal time格林尼治平恒星时