新华网天津5月28日电(记者周润健、蔡玉高)天津、江苏两地天文学会通报,如果天气晴朗,5月31日晚,我国公众肉眼可见金星以及“北河三”和“北河二”三星会聚的少见景象。天文爱好者可别错过这个好时机。
据天津市天文学会理事赵之珩介绍,进入5月,金星由金牛座渐渐进入双子座。31日晚8时左右,人们仰望西方天空,会看到三颗亮星异常接近,几成一条直线,其中最亮的是金星,另外两颗就是双子座著名双星北河二和北河三。三星的位置,由上到下,依次是北河二、北河三和金星。当晚,三星争辉,争俏天宇,异常美丽。 继续阅读 »

我国探月二期工程将发射软着陆器和月球车,软着陆器用于在着陆区进行就位探测,月球车进行巡视探测,它们将在月球上停留三“天”,相当于地球上的三个月。昨天,首场“首都科学讲堂”在王府井新华书店开讲,我国探月工程首席科学家欧阳自远院士(见上图)向市民讲述了我国的月球探测计划。
“目前,‘嫦娥一号’的11个系统和运载火箭的9个系统都已经全部完成,待命出厂。”欧阳自远院士在报告中指出,我国的探月工程“前有堵截、后有追兵”,所有零部件全靠自主研发,没有一件来自国外。
据欧阳自远院士介绍,将于今年下半年发射的“嫦娥一号”探月卫星将获取月球表面三维立体影像、分析月球表面有用元素的含量和物质类型的分布特点、探测月壤特性与厚度和地球至月球的空间环境四大任务。我国月球计划分探月工程、登月工程和驻月工程三大步。第一大步中又分成“绕、落、回”三期。其中发射“嫦娥一号”是第一期。探月二期工程预计在2012年发射软着陆器和月球车,软着陆器在着陆区进行就位探测,月球车进行巡视探测。
我国探月二期工程发射的软着陆器和月球车将在月球上工作“三天”,也就是地球上三个月的时间。昨天,我国探月计划首席科学家欧阳自远院士在“首都科学讲堂”为市民们作报告时表示,今年下半年我国将发射“嫦娥一号”探月卫星,实现中华民族的千年梦想。
“目前,‘嫦娥一号’的11个系统和运载火箭的9个系统都已经全部完成,待命出厂。”欧阳自远院士在题为《直面挑战———中国的月球探测》的报告中指出,我国的探月工程“前有堵截、后有追兵”,所有零部件全靠自主研发,没有一件来自国外。
欧阳自远院士在报告中还对公众关注的探月经费问题进行了说明。他指出,探月一期工程国家斥资14亿人民币,相当于目前修2公里地铁的价格,占我国的GDP的比例很小,而探月二三期工程也将保持大致的规模,占到当时我国GDP的四万分之一左右。
据欧阳自远院士介绍,将于今年下半年发射的“嫦娥一号”探月卫星将承担获取月球表面三维立体影像、分析月球表面有用元素的含量和物质类型的分布特点、探测月壤特性与厚度和地球至月球的空间环境四大任务。预计在2012年进行的探月二期工程将发射软着陆器和月球车,软着陆器在着陆区进行就位探测,月球车进行巡视探测。
中新社上海五月二十七日电 由上海航天局和闵行区政府联合举办的“永远的航天精神”展,连日来吸引了大批上海市民前往参观。据展会上传出的信息,包括航天科技研发中心、航天科普园、航天产业基地在内的三大主体项目建设进展顺利,上海航天城正由蓝图变为现实。
按照规划,“十一五”期间上海航天局将在闵行区建设三大工程。其中航天科技研发中心一期工程将于今年年底前建成并投入使用, 航天科技研发中心将实现上海市航天系统多家科研机构的整合。该项目建成后,上海的六千多名航天领域高级工程技术人员将集聚到这里,开展火箭、卫星、飞船和深空探测领域研发,以及载人航天、“嫦娥工程”二期、火星探测计划等重点研发任务。
规划面积达五平方公里的航天产业基地则将成为航天高科技向民用产品领域转化的摇篮。产业基地首期一平方公里启动区内,目前已有上海“神州新能源”、“康巴塞特科技”、“万源稀土电机研发”等项目落地。在本次展览会上,这些企业生产的新颖太阳能电池硅片、纤维全缠绕铝内胆气瓶等产品也纷纷亮相。
正在建设的航天科普园,将成为中国内地唯一的国家航天博物馆,展品将包括“东方红一号”、“风云”系列卫星、载人飞船和月球车等中国航天半个多世纪以来重要航天工程研发的实物。未来科普园中还将建设神舟发射塔、欧洲阿里安火箭、美国航天飞机、俄罗斯空间站等大型模型,这里也将成为国内重要的航天科普和国防教育基地。
[国家航天局网讯] 2007年5月24日,中国国家航天局局长孙来燕在欧洲空间局总部签署了“在重大自然或技术灾害中协调利用空间设施的合作宪章”(简称“减灾合作宪章”),标志着中国成为该国际减灾合作机制的正式成员。
“减灾合作宪章”是由欧洲空间局和加拿大航天局发起建立的减灾合作机制。该机制通过利用其成员机构提供的卫星资源,向遭受重大灾害的国家无偿提供相关的数据和信息,以协助受灾国对灾害进行监测和评估。
自2000年正式宣布投入运作以来,该机制已向有关受灾国提供了针对洪灾、滑坡、地震、林火、飓风、火山等灾害的数据支持。至今已有7个国家的航天机构加入了“减灾合作宪章”,联合国外空司于2004年成为该机制的合作伙伴和授权用户。(李岳)
[国家航天局网讯] 2007年5月24日,中国-欧洲空间局航天合作指导委员会第一次会议在位于法国巴黎的欧空局总部举行。中国国家航天局局长、委员会中方主席孙来燕和欧空局局长、欧方主席道达尔共同主持了会议。
双方签署了《中欧航天合作现状和合作计划议定书》,该议定书明确了2007-2008年双方合作的领域和方向,并成立了空间科学和探测、微重力、教育、对地观测等四个工作组。双方还就嫦娥一号卫星的地面支持协议达成了一致。双方一致同意通过优势互补,促成更加广泛深入的中欧航天合作。(李岳)
新华社电 (记者 孙彦新 朱鸿亮) 25日15时12分,我国在酒泉卫星发射中心用“长征二号丁”运载火箭成功地将“遥感卫星二号”送入太空。同时,搭载了一颗浙江大学研制的皮星一号卫星。
这次发射的“遥感卫星二号”主要用于科学试验、国土资源普查、农作物估产和防灾减灾等领域。搭载发射的“浙大皮星一号”主要用于皮卫星平台验证及微电子机械系统等技术试验。
Although originally designed to measure atmospheric water vapor and temperature profiles for weather forecasting, data from the Atmospheric Infrared Sounder (AIRS) instrument on NASA’s Aqua spacecraft are now also being used by scientists to observe atmospheric carbon dioxide.
Scientists from NASA; the National Oceanic and Atmospheric Administration; the European Center for Medium-Range Weather Forecasts; the University of Maryland, Baltimore County; Princeton University, Princeton, New Jersey; and the California Institute of Technology (Caltech), Pasadena, Calif., are using several different methods to measure the concentration of carbon dioxide in the mid-troposphere (about eight kilometers, or five miles, above the surface).
The global map of mid-troposphere carbon dioxide above, produced by AIRS Team Leader Dr. Moustafa Chahine at JPL, shows that despite the high degree of mixing that occurs with carbon dioxide, the regional patterns of atmospheric sources and sinks are still apparent in mid-troposphere carbon dioxide concentrations.
"This pattern of high carbon dioxide in the Northern Hemisphere (North America, Atlantic Ocean, and Central Asia) is consistent with model predictions," said Chahine. Climate modelers, such as Dr. Qinbin Li at JPL, and Dr. Yuk Yung at Caltech, are currently using the AIRS data to study the global distribution and transport of carbon dioxide and to improve their models.
A growing number of Chinese telecom and computer companies support a local encryption standard for wireless Internet that challenges US technology in the field, state media said Wednesday. The WAPI encryption standard, a Chinese-made rival of the US-backed 802.11 standard, has received the endorsement of companies such as cellphone operator China Mobile and PC vendor Lenovo, the China Daily reported.
"A complete WAPI industry chain is already taking shape and it is set to prevail in China," said Jiang Shiping, chairman of the WAPI alliance, an industry group pushing the standard.
Encryption software transforms messages into virtually unbreakable code in order to make sure the information does not wind up in the wrong hands.
China has been pushing hard for its own standards in a range of product categories including third-generation mobile phones, digital TV and home networking in a bid to leverage domestic firms and reduce reliance on foreign technologies.
The China Daily said technology standards issue will likely be discussed at the two-day Sino-US Strategic Economic Dialogue, which started in Washington on Tuesday.
Navigating devices using Russian satellites will appear in the shops this year as the first alternative to the widely used GPS network of the United States, officials said on Wednesday. "The individual devices receiving signals from Glonass will appear in shops in our country by the end of this year," Russia’s First Deputy Prime Minister Sergei Ivanov told journalists.
The Glonass satellite network, which is also used by the Russian military, was set up to compete with the US’ GPS network, which is widely used around the world, and Europe’s planned Galileo system.
But development of the system has lagged behind schedule, and Ivanov conceded that it would only have global coverage — with a planned total of 24 satellites — by 2009.
The Russian devices, which will also receive signals from the GPS network, can be used by planes, ships, armoured vehicles and trains, as well as by individual users, Ivanov said.