observatory

• Laser interferometer gravitational wave observatory ligo
  激光干涉引力波天文台
• Are also available on the hong kong observatory home page
  天文台网页亦可找到
• The observatory commences ultraviolet index forecast
  天文台推出紫外线指数预测服务
• The observatory computer system and its applications
  天文台的电脑系统及其应用
• Observatory staff explaining the exhibits to visitors
  天文台人员讲解展品内容