31. However, the vernal equinox and the full moon are not determined by astronomical observation . 32. He began maintaining detailed journals of all his astronomical observations . 33. Rayton's lens design skill did much to advance astronomical observation . 34. In 1840, M�dler was appointed director of the meteorological as well as astronomical observations . 35. He has also presented research on ancient astronomical observations to the European Association of Archaeologists 36. Gro�mugl opened a permanent star walk installation designated for astronomical observations with the unaided eye. 37. Occasionally there will be public access to astronomical observations made by a local astronomy club. 38. The photometric function used to interpret astronomical observations and remote sensing data for the Earth. 39. She made 78, 876 astronomical observations in her lifetime. 40. The success of the telescope helped demonstrate the value of Mauna Kea for astronomical observations .
