Theme One: Astronomy
　　astronomer astronomical astronaut
　　astrology observatory telescope
　　solar system cosmic rays cosmos
　　interstellar intergalactic galaxy
　　The Milky Way The Big Bang comet
　　asteroid satellite meteor
　　meteorite revolution rotation
　　radiation constellation cluster
　　lunar eclipse velocity
　　corona terrestrial planetary
　　exploration hypothesis assume
　　collision supernova nova
　　light year gravitation nebula
　　1 astronomern. 天文学家
　　During his own tenure as astronomer royal, from 1720 to 1742, Halley studiously tracked the moon.
　　2 astronomicala. 天文学的, 天文数字的, 庞大的
　　A man-made clock would certainly prove a useful accessory to astronomical reckoning but could never stand in its stead.
　　3 astronaut n. 太空人, 宇航员, 太空旅行者
　　In their most visible work, astronauts will let loose a retrievable satellite carrying a coffin-sized inflatable antenna.
　　4 astrologyn. 占星学, 占星术
　　Racing expert John Randall phoned a friend on the ￡1million astrology question on Monday.
　　5 observatoryn. 天文台, 气象台
　　The accuracy of global field models depends on the worldwide network of magnetic observatories.
　　6 telescopen. 望远镜
　　Details on the moon’s surface can be seen through a telescope.
　　7 solar systemn. 太阳系
　　A less-contrived example involves the relation between Kepler’s theory of the solar system and Newton’s.
　　8 cosmic raysn. 宇宙射线
　　A stray cosmic ray might do the same thing.
　　9 cosmosn. (被视作和谐体系的)宇宙
　　Among the factors that stand out in the Orphic construal of a cosmos is the nature of time.
　　10 interstellara. 星际的