11. His earlier studies had focused on solar observation , but after the war he concentrated on the Moon. 12. One refractor Coud?has a aperture and focal distance provided with Lyot's monochromatic filter for solar observation . 13. He also illustrated a large workshop camera obscura for solar observations using the telescope and scioptric ball. 14. The L1 position is useful for solar observations since it is near Earth but in constant sunlight. 15. The autonomous spacecraft failed to execute a two-day, pre-programmed series of solar observations when it was deployed Friday. 16. The Udaipur Solar Observatory has become internationally renowned as one of the major centers for high-resolution solar observations . 17. Solar observations with LOFAR will include routine monitoring of the solar activity as the root of Space Weather.18. For twenty years, between 1968 until 1988, the University of Bern ran a solar observation lab in the village. 19. At the same time, Air Force Weather, as the single agent for all of DoD, began solar observations and forecasting. 20. Solar observations provide a one-to three-day warning of an Earthbound coronal mass ejection ( CME ), depending on CME speed.
