Chinese Space Station(CSS)has been fully deployed by the end of 2022,and the facility has entered into the application and development phase.It has conducted scientific research projects in various fields,such as spac...Chinese Space Station(CSS)has been fully deployed by the end of 2022,and the facility has entered into the application and development phase.It has conducted scientific research projects in various fields,such as space life science and biotechnology,space materials science,microgravity fundamental physics,fluid physics,combustion science,space new technologies,and applications.In this review,we introduce the progress of CSS development and provide an overview of the research conducted in Chinese Space Station and the recent scientific findings in several typical research fields.Such compelling findings mainly concern the rapid solidification of ultra-high temperature alloy melts,dynamics of fluid transport in space,gravity scaling law of boiling heat transfer,vibration fluidization phenomenon of particulate matter,cold atom interferometer technology under high microgravity and related equivalence principle testing,the full life cycle of rice under microgravity and so forth.Furthermore,the planned scientific research and corresponding prospects of Chinese space station in the next few years are presented.展开更多
By introducing two famous works of Mr.Zhang Kaiji in his later years,the reconstruction plan of Beijing Planetarium and the Museum of Chinese Revolution and the Museum of Chinese History,the paper analyzes the "c...By introducing two famous works of Mr.Zhang Kaiji in his later years,the reconstruction plan of Beijing Planetarium and the Museum of Chinese Revolution and the Museum of Chinese History,the paper analyzes the "courtyard·yard" space he once imagined in the modern city and large public buildings,and expounds the value and significance of his conception.The author believes that the expansion and transformation of important works should be based on historical research and centered on the spirit of space,and the intangible space outside of tangible entities should be carefully treated,so as to better complete the transmission of modern Chinese space experience.展开更多
On October 3-7,the 62nd International Astronautical Congress (IAC) was held in Cape Town,South Africa.Chinese aerospace expert Liu Jiyuan was given the Von Karman Award,the highest such prize presented by the Intemati...On October 3-7,the 62nd International Astronautical Congress (IAC) was held in Cape Town,South Africa.Chinese aerospace expert Liu Jiyuan was given the Von Karman Award,the highest such prize presented by the Intemational Academy of Astronautics (IAA).Liu Jiyuan is the first Chinese expert to receive the Von Karman Award.The award,created in 1982,is IAA's premier award given annually to scientists with outstanding lifetime achievements.展开更多
The Chinese Space Station Telescope(CSST)is a cutting-edge two-meter astronomical space telescope currently under construction.Its primary Survey Camera(SC)is designed to conduct large-area imaging sky surveys using a...The Chinese Space Station Telescope(CSST)is a cutting-edge two-meter astronomical space telescope currently under construction.Its primary Survey Camera(SC)is designed to conduct large-area imaging sky surveys using a sophisticated seven-band photometric system.The resulting data will provide unprecedented data for studying the structure and stellar populations of the Milky Way.To support the CSST development and scientific projects related to its survey data,we generate the first comprehensive Milky Way stellar mock catalogue for the CSST SC photometric system using the TRILEGAL stellar population synthesis tool.The catalogue includes approximately 12.6 billion stars,covering a wide range of stellar parameters,photometry,astrometry,and kinematics,with magnitude reaching down to g=27.5 mag in the AB magnitude system.The catalogue represents our benchmark understanding of the stellar populations in the Milky Way,enabling a direct comparison with the future CSST survey data.Particularly,it sheds light on faint stars hidden from current sky surveys.Our crowding limit analysis based on this catalogue provides compelling evidence for the extension of the CSST Optical Survey(OS)to cover low Galactic latitude regions.The strategic extension of the CSST-OS coverage,combined with this comprehensive mock catalogue,will enable transformative science with the CSST.展开更多
As a result of Japan raising the alert level at its quake-damaged nuclear plant from four to seven on a seven-point international scale of atomic incidents,which was caused by the 9.0-magnitude earthquake
China scheduled to complete the assembly of the T-shaped Tiangong Space Station in 2022,and will enter a new stage of utilization.There are more than 20 experiment racks inside the modules,and more than 50 external on...China scheduled to complete the assembly of the T-shaped Tiangong Space Station in 2022,and will enter a new stage of utilization.There are more than 20 experiment racks inside the modules,and more than 50 external onboard payloads mounting spaces,which will support large-scale science and technology experiments during the operation.The development of internal experiment racks and external research accommodations approved during the construction has been completed,of which 4 racks in Tianhe core module,including High Microgravity Level research Rack(HMLR)and Container-less Materials Processing Rack(CMPR),have finished on-orbit tests;while other racks in Wentian and Mengtian experiment modules are under comprehensive ground tests.The Chinese Space Survey Telescope(CSST)has advanced much in the last two years with 24 pre-launch research projects funded and 4 joint science center built in preparation for CSST’s future scientific observations and operations.The systematic research planning for China’s Space Station(CSS)during 2022-2032 is updated with the researches classified into four important areas:space life sciences and human research,microgravity physical sciences,space astronomy and Earth science,and new space technologies and applications.According to the planning,more than 1000 experiments are expected to perform in CSS during the operating period.Overall,the CSS utilization missions are proceeding as planned,which will contribute to the major scientific or application output and have a positive impact on the quality of life on Earth.展开更多
With the approaching of the Chinese Space Station(CSS)era,the focus of space medicine applications and related research has shifted to addressing the astronauts’health support in long-duration spaceflights,including ...With the approaching of the Chinese Space Station(CSS)era,the focus of space medicine applications and related research has shifted to addressing the astronauts’health support in long-duration spaceflights,including nutrition,countermeasure against the physiological effects of weightlessness,medical monitoring and support,psychology status,etc.,and accordingly the human experiments to simulate long-duration weightlessness have been carried out.Increasingly,basic research has been put forward in the key areas,such as space bone loss,cardiovascular dysfunction and the molecular mechanisms underlying radiobiological effects.Moreover,specific novel research fields,such as hypometabolism technology,were explored.The research projects in the field of space medicine experiment,as an important aspect of the Chinese Space Station’s application,have been officially approved and launched.展开更多
A dedicated 24 h S/X dual-band geodetic very long baseline interferometry(VLBI) experiment was conducted in January 2015 with the goal of improving the position estimates for the Chinese Deep Space Station Kashi. Prev...A dedicated 24 h S/X dual-band geodetic very long baseline interferometry(VLBI) experiment was conducted in January 2015 with the goal of improving the position estimates for the Chinese Deep Space Station Kashi. Previously, the position estimates had been only accurate to ~20 cm, which is insufficient for future Chinese deep space explorations. The experiment design and data reduction are described with special emphasis on the limited frequency ranges of Kashi for bandwidth synthesis. A narrowed multi-band delay search window based on post-fit residuals was utilized to resolve the sub-ambiguities due to the drop of a frequency channel in fringe fit, which saved ~22% of the observations from the affected baseline. Final position estimates of Kashi were obtained from the global solution by using more than 5300 international VLBI sessions from August 1979 to September 2015, and estimates were found to be accurate to about 10, 25, and 20 mm in the X, Y, and Z components. Various statistical tests were run, and the estimates and precisions are believed to be reliable.展开更多
文摘Chinese Space Station(CSS)has been fully deployed by the end of 2022,and the facility has entered into the application and development phase.It has conducted scientific research projects in various fields,such as space life science and biotechnology,space materials science,microgravity fundamental physics,fluid physics,combustion science,space new technologies,and applications.In this review,we introduce the progress of CSS development and provide an overview of the research conducted in Chinese Space Station and the recent scientific findings in several typical research fields.Such compelling findings mainly concern the rapid solidification of ultra-high temperature alloy melts,dynamics of fluid transport in space,gravity scaling law of boiling heat transfer,vibration fluidization phenomenon of particulate matter,cold atom interferometer technology under high microgravity and related equivalence principle testing,the full life cycle of rice under microgravity and so forth.Furthermore,the planned scientific research and corresponding prospects of Chinese space station in the next few years are presented.
文摘By introducing two famous works of Mr.Zhang Kaiji in his later years,the reconstruction plan of Beijing Planetarium and the Museum of Chinese Revolution and the Museum of Chinese History,the paper analyzes the "courtyard·yard" space he once imagined in the modern city and large public buildings,and expounds the value and significance of his conception.The author believes that the expansion and transformation of important works should be based on historical research and centered on the spirit of space,and the intangible space outside of tangible entities should be carefully treated,so as to better complete the transmission of modern Chinese space experience.
文摘On October 3-7,the 62nd International Astronautical Congress (IAC) was held in Cape Town,South Africa.Chinese aerospace expert Liu Jiyuan was given the Von Karman Award,the highest such prize presented by the Intemational Academy of Astronautics (IAA).Liu Jiyuan is the first Chinese expert to receive the Von Karman Award.The award,created in 1982,is IAA's premier award given annually to scientists with outstanding lifetime achievements.
基金supported by the National Key R&D Program of China(Grant Nos.2021YFC2203100,and 2021YFC2203104)the science research grants from the China Manned Space Project(Grant No.CMSCSST-2021-A08)+4 种基金the National Natural Science Foundation of China(Grant No.12003001)the Anhui Project(Grant No.Z010118169)the support of the National Natural Science Foundation of China(Grant No.12203100)the National Natural Science Foundation of China(Grant No.12273077)the support from Padova University through the research project PRD 2021。
文摘The Chinese Space Station Telescope(CSST)is a cutting-edge two-meter astronomical space telescope currently under construction.Its primary Survey Camera(SC)is designed to conduct large-area imaging sky surveys using a sophisticated seven-band photometric system.The resulting data will provide unprecedented data for studying the structure and stellar populations of the Milky Way.To support the CSST development and scientific projects related to its survey data,we generate the first comprehensive Milky Way stellar mock catalogue for the CSST SC photometric system using the TRILEGAL stellar population synthesis tool.The catalogue includes approximately 12.6 billion stars,covering a wide range of stellar parameters,photometry,astrometry,and kinematics,with magnitude reaching down to g=27.5 mag in the AB magnitude system.The catalogue represents our benchmark understanding of the stellar populations in the Milky Way,enabling a direct comparison with the future CSST survey data.Particularly,it sheds light on faint stars hidden from current sky surveys.Our crowding limit analysis based on this catalogue provides compelling evidence for the extension of the CSST Optical Survey(OS)to cover low Galactic latitude regions.The strategic extension of the CSST-OS coverage,combined with this comprehensive mock catalogue,will enable transformative science with the CSST.
文摘As a result of Japan raising the alert level at its quake-damaged nuclear plant from four to seven on a seven-point international scale of atomic incidents,which was caused by the 9.0-magnitude earthquake
文摘China scheduled to complete the assembly of the T-shaped Tiangong Space Station in 2022,and will enter a new stage of utilization.There are more than 20 experiment racks inside the modules,and more than 50 external onboard payloads mounting spaces,which will support large-scale science and technology experiments during the operation.The development of internal experiment racks and external research accommodations approved during the construction has been completed,of which 4 racks in Tianhe core module,including High Microgravity Level research Rack(HMLR)and Container-less Materials Processing Rack(CMPR),have finished on-orbit tests;while other racks in Wentian and Mengtian experiment modules are under comprehensive ground tests.The Chinese Space Survey Telescope(CSST)has advanced much in the last two years with 24 pre-launch research projects funded and 4 joint science center built in preparation for CSST’s future scientific observations and operations.The systematic research planning for China’s Space Station(CSS)during 2022-2032 is updated with the researches classified into four important areas:space life sciences and human research,microgravity physical sciences,space astronomy and Earth science,and new space technologies and applications.According to the planning,more than 1000 experiments are expected to perform in CSS during the operating period.Overall,the CSS utilization missions are proceeding as planned,which will contribute to the major scientific or application output and have a positive impact on the quality of life on Earth.
文摘With the approaching of the Chinese Space Station(CSS)era,the focus of space medicine applications and related research has shifted to addressing the astronauts’health support in long-duration spaceflights,including nutrition,countermeasure against the physiological effects of weightlessness,medical monitoring and support,psychology status,etc.,and accordingly the human experiments to simulate long-duration weightlessness have been carried out.Increasingly,basic research has been put forward in the key areas,such as space bone loss,cardiovascular dysfunction and the molecular mechanisms underlying radiobiological effects.Moreover,specific novel research fields,such as hypometabolism technology,were explored.The research projects in the field of space medicine experiment,as an important aspect of the Chinese Space Station’s application,have been officially approved and launched.
基金supported by China’s Lunar Exploration Key Techniques Research Program (Grant No. TY3Q20100009)
文摘A dedicated 24 h S/X dual-band geodetic very long baseline interferometry(VLBI) experiment was conducted in January 2015 with the goal of improving the position estimates for the Chinese Deep Space Station Kashi. Previously, the position estimates had been only accurate to ~20 cm, which is insufficient for future Chinese deep space explorations. The experiment design and data reduction are described with special emphasis on the limited frequency ranges of Kashi for bandwidth synthesis. A narrowed multi-band delay search window based on post-fit residuals was utilized to resolve the sub-ambiguities due to the drop of a frequency channel in fringe fit, which saved ~22% of the observations from the affected baseline. Final position estimates of Kashi were obtained from the global solution by using more than 5300 international VLBI sessions from August 1979 to September 2015, and estimates were found to be accurate to about 10, 25, and 20 mm in the X, Y, and Z components. Various statistical tests were run, and the estimates and precisions are believed to be reliable.
