  日心说heliocentric theory
  地心说geocentric thetory
 托勒玫体系
                    
  太阳系solar system
行星planet
 大行星major planets
 内行星inner planets
  类地行星
  外行星
 巨行星great planets
 轨道orbit
椭圆ellipse
 焦点focus
 长径major axis
 短径minor axis
 矢径radius axis
  近日点perihelion
  远日点aphelion
偏心率eccentricity
 调和定律harmonic law
 公转revolution
自传rptation
年year
日day
 顺行direct motion
 逆行retrograde motion
 小行星minor planets
 流星体mereoroids
 流星meteors
 流星雨shower meteor
 流星群meteoroid swarm
     慧星comet
  慧发coma
  慧尾tail of comet
  慧核nucleus of comet
 木星族Jupiter family
  行星的卫星Planeary Satellite
  伽利略卫星Galilean Satellites
   近地点Perigee
  远地点apogee
  恒星月Sidereal month
 朔望月Synodic month
合conjunction
冲opposition
方照quadrature
 月相phasses of moon
  --     月食--偏食，全食Iunar eclipse --partial, total
 本影umbra
 半影penumbra
 日食solar eclipse
 海洋潮汐ocean tide
  长椭球prolate ellipsoid
高潮high water
低潮low water
  潮汐曲线tide curve
 大潮spring tide
 小潮neap tides