Unit 4 Astronomy: the science of the starsPart 1 Topic vocabularyVocabulary revisionThere are approximately four hundred million _________银河系 in the ______宇宙. We can see only a small part of our galaxy. There are over three billion stars in____________银河. The sun is one of the stars. There are nine ________行星(Mercury 水星,Venus 金星 the Earth 地球Mars 火星 Jupiter 木星 Saturn 土星 Uranus 天王星 Neptune 海王星 Pluto 冥王星) around the sun. The Earth is the third planet from the sun. The Earth has one natural_________卫星--moon. The moon is only a quarter of the size of the Earth.Shenzhou V Chinese people have been dreaming of going into____________外太空 ever since before. China had ____________发射 three ___________________无人飞 船 successfully from 1999 to 2005. On Dec. 31, 2002 ,the launch of the fourth spacecraft "Shenzhou IV" was another big success and the spacecraft returned to the earth safely on January 5, 2003. During its flight, seven scientific experiments were carried out. The purpose of the flight was to make preparations for the launch of a manned spacecraft next time. The successful launch and return show that China is able to send a person into space soon. In 2003,the first manned spacecraft Shenzhou V was sent into space successfully. And the Chinese dream has come true. Special report: China launches first lunar orbiter BEIJING, Oct. 24 (Xinhua) -- Testing operators have started leaving the __________（发射塔） in the Xichang ____________________（卫星发射中心）, where China's first lunar probe Chang'e-1 will _____________（点火起飞）at around 6:00 p.m. on Wednesday. In a building about 3 km away from the tower, technicians in the remote control center are uploading the flight...
