美国东部时间3月28日15时14分（北京时间29日3时14分），美国“发现”号航天飞机平安降落在佛罗里达州肯尼迪航天中心。（新华社/法新）
美国“发现”号航天飞机3月28日平安降落在佛罗里达州肯尼迪航天中心，圆满完成了为国际空间站运送托架片段以及太阳能电池板的任务。
美国航天局的电视直播画面显示，“发现”号的着陆时间是美国东部时间15时14分（北京时间29日3时14分）。“发现”号原定于当天13时39分着陆，但天气原因迫使其着陆推迟了一个多小时。
3月28日，美国“发现”号航天飞机准备在佛罗里达州肯尼迪航天中心着陆。美国东部时间28日15时14分（北京时间29日3时14分），美国“发现”号航天飞机平安降落在佛罗里达州肯尼迪航天中心。（新华社/法新）
“欢迎回家，‘发现’号，你们的任务完成得非常棒，”地面控制人员通过无线电对机组指令长李·阿尔尚博说。“回家的感觉真好，”阿尔尚博回应道。
“发现”号于3月15日升空，17日与空间站对接。在为期8天的对接期间，“发现”号机组宇航员共进行了3次太空行走，完成了空间站托架的安装工作，安装并展开了空间站第四组也是最后一组太阳能电池板，使空间站太阳能电池板的总发电功率达到120千瓦。
托架相当于空间站的脊柱，由11个片段组成。宇航员们此次安装的最后一个片段名为S6，其重量达到约14吨。S6安装完毕后，空间站托架总长度达到335英尺（约102.1米）。
“发现”号还为空间站的水循环设备送去了一个新部件。水循环设备是保证空间站常驻人员扩编的重要设施。按计划，到今年5月份，国际空间站长期考察组成员将由目前的3人增加至6人。
“发现”号也从空间站带回不少货物，包括空间站宇航员们的血样、尿样以及唾液样品、水循环设备利用宇航员尿液和汗液制成的循环水等，美国航天局将研究这些水是否适合饮用。
“发现”号此行是美国航天飞机今年的首次飞行。航天飞机的下次飞行时间目前暂定于5月12日，届时宇航员将乘坐“阿特兰蒂斯”号航天飞机升空，他们的任务是对哈勃太空望远镜进行最后一次维修。
译文:
the Space Shuttle Discovery Touchdown Safely
At US Eastern Time 3:14pm on March 28,the space shuttle Discovery landed safely at Florida Kennedy space center.(Xinghau Agence/ Agence France Presse)
The space shuttle Discovery,which landed safely at Florida Kennedy space center on March 28,has fulfiled its mission of delivering the bracket fragment as well as the solar energy cell pannel for the international space station.
NASA's live TV showed that the space shuttle Discovery was supposed to land at 1:30pm on March 28.The postponement for more than one hour was due to the bad weather.
On March 28,the space shuttle Discovery ia making preparation for touchdown in the Florida Kennedy space center
At US Eastern Time 3:14pm on March 28,the space shuttle Discovery landed safely at Florida Kennedy space center.(Xinghau Agence/ Agence France Presse)
“Discovery,welcome back, you do a very good job.” The ground control personnel said to the flight Director Lee Ahlshabo through radio.”Coming back makes me feel good.” replied Lee Ahlshabo.
The space shuttle Discovery lifted off on March 15,then docked at the international space station on March 17.During the 8 days of docking, 3 spacewalks have been done by the Discovery crew members.The astronauts have finished the installation of bracket.They also fixed and showed the 4
th but the final part of solar energy cell pannel,which mounted the total generated output up to 120kw.
The bracket ,which consists of 11 parts,is like the spinal column of the space station.The final one named S6, which the astronauts fixed,is about 14 tons in weight.After the installation of S6,the entire length of the bracket at the international space station.is up to 355 inches(about 102.1m).
Discovery also delivered a new part for the water cycle equipment which is guarantee for the permanent personnels augmenting at the space station.According to the plan, the members of long-term study group will double its crew to six people by May.
Discovery brought back many cargos from the space station,including blood sample, urine specimen as well as saliva sample of the astronauts,and they also were back with the cycling water which was made from urine and the sweat of the astronauts by the water cycle equipment. NASA's scientists will do some research to find out whether it is drinkable.
The space shuttle Discovery was the US initial flight this year. The next flight time is scheduled to blast off on May 12.By that time, the astronauts ,whose mission is to carry on the final repair for the outer space telescope Harbo,will lift off by taking the space shuttle Atlantis.