The development history of the project design of spaceflight launching site in China and the main forms used in these designs were introduced in this thesis, and it was pointed out that the spaceflight launch should n...The development history of the project design of spaceflight launching site in China and the main forms used in these designs were introduced in this thesis, and it was pointed out that the spaceflight launch should not use only one fixed model. According to its nation condition, China should design and build the launching project facility and device which correspond to the technology development of spacecraft and carrier rocket.展开更多
Lunar meteorites are fragments of the Moon that escaped the gravity of the Moon following high-energy impacts by asteroids, subsequently fell to Earth. An inventory of 165 lunar meteorites has been developed since the...Lunar meteorites are fragments of the Moon that escaped the gravity of the Moon following high-energy impacts by asteroids, subsequently fell to Earth. An inventory of 165 lunar meteorites has been developed since the discovery and identification of the first lunar meteorite, ALHA 81005, in 1979. Although the Apollo samples are much heavier in mass than lunar meteorites, the meteorites are still an important sample supplement for scientific research on the composition and history of the Moon. Apart from a small amount of unbrecciated crystalline rocks, the majority of lunar meteorites are breccias that can be classified into three groups： highland feldspathic breccia, mare basaltic breccia, and mingled（including fledspathic and basaltic clasts） breccia. The petrography of lunar rocks suggests that there are a series of rock types of anorthosite, basalt, gabbro, troctolite, norite and KREEP in the Moon. Although KREEP is rare in lunar rocks, KREEP components have been found in the increasing number of lunar meteorites. KREEP provides important information on lunar magmatic evolution, e.g., the VHK KREEP clasts in SaU 169 may represent the pristine lunar magma （urKREEP）. Six launching pairs of lunar meteorites have been proposed now, along with ten possible lunar launching sites. In addition, symplectite is often found in lunar basalts, which is a significant record of shock metamorphism on the lunar surface. Furthermore, isotopic ages and noble gases not only provide information on crystallization processes in lunar rocks and the formation of lunar crust, but also provide insight into shock events on the lunar surface.展开更多
China＇s commercial space activities started from the launch of Asiasat- I satellite by a LM-B launch vehicle on April 7, 1990. As the leading force in ChinEs space industry, CASC has been committed to commercial spac...China＇s commercial space activities started from the launch of Asiasat- I satellite by a LM-B launch vehicle on April 7, 1990. As the leading force in ChinEs space industry, CASC has been committed to commercial space for nearly 30 years. The article describes CASC＇s advantages and activities in commercial space sector, as well as outlook for CASC commercial space development. The author concludes CASC is willing to coordinate and cooperate with state-owned and private companies and will create a new pattern for commercial space, opening up a new industry for space development and achieving more splendid achievement.展开更多
文摘The development history of the project design of spaceflight launching site in China and the main forms used in these designs were introduced in this thesis, and it was pointed out that the spaceflight launch should not use only one fixed model. According to its nation condition, China should design and build the launching project facility and device which correspond to the technology development of spacecraft and carrier rocket.
基金funded by the National Natural Science Foundation of China(Grant nos.41173077 and 40673055)the National Natural Resources Platform Project of China(Grant no.2005DKA21406-1)the Director Fund Project of Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration(Grant no.13A-01-02)
文摘Lunar meteorites are fragments of the Moon that escaped the gravity of the Moon following high-energy impacts by asteroids, subsequently fell to Earth. An inventory of 165 lunar meteorites has been developed since the discovery and identification of the first lunar meteorite, ALHA 81005, in 1979. Although the Apollo samples are much heavier in mass than lunar meteorites, the meteorites are still an important sample supplement for scientific research on the composition and history of the Moon. Apart from a small amount of unbrecciated crystalline rocks, the majority of lunar meteorites are breccias that can be classified into three groups： highland feldspathic breccia, mare basaltic breccia, and mingled（including fledspathic and basaltic clasts） breccia. The petrography of lunar rocks suggests that there are a series of rock types of anorthosite, basalt, gabbro, troctolite, norite and KREEP in the Moon. Although KREEP is rare in lunar rocks, KREEP components have been found in the increasing number of lunar meteorites. KREEP provides important information on lunar magmatic evolution, e.g., the VHK KREEP clasts in SaU 169 may represent the pristine lunar magma （urKREEP）. Six launching pairs of lunar meteorites have been proposed now, along with ten possible lunar launching sites. In addition, symplectite is often found in lunar basalts, which is a significant record of shock metamorphism on the lunar surface. Furthermore, isotopic ages and noble gases not only provide information on crystallization processes in lunar rocks and the formation of lunar crust, but also provide insight into shock events on the lunar surface.
文摘China＇s commercial space activities started from the launch of Asiasat- I satellite by a LM-B launch vehicle on April 7, 1990. As the leading force in ChinEs space industry, CASC has been committed to commercial space for nearly 30 years. The article describes CASC＇s advantages and activities in commercial space sector, as well as outlook for CASC commercial space development. The author concludes CASC is willing to coordinate and cooperate with state-owned and private companies and will create a new pattern for commercial space, opening up a new industry for space development and achieving more splendid achievement.
