首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Anyone who lives in the eastern part of the United States or Canada and gazed skyward on Tuesday evening may have noticed someth
Anyone who lives in the eastern part of the United States or Canada and gazed skyward on Tuesday evening may have noticed someth
admin
2010-01-10
11
问题
Anyone who lives in the eastern part of the United States or Canada and gazed skyward on Tuesday evening may have noticed something strange in their west-northwest sky.
At around 9 p.m. ET, a small, bright, silvery circular cloud of light suddenly appeared. Over the next 25 minutes, the cloud appeared to gradually expand and fade, finally becoming invisible to the unaided eye. Those who saw it, wondered exactly what it might have been.
John Bottle, a well-known amateur astronomer with over four-decades of experience of sky observing first caught sight of the cloud at 9:03 p. m. from his home in Stormville, New York. Initially, he thought the cloud was as bright as zero or first magnitude and upon examining it carefully with binoculars, thought that it "... resembled the petals of a day lily." By 9:30 p. m. , he reported that the cloud had faded completely from his view.
From the North Fork of Long Island, Bill Bogardus and his wife were out observing when they took note of the cloud "... about the size of the moon" in the northwest sky. "It was a roundish, yet not all that round, object drifting towards our location very slowly, slower than most satellites because it took at least twenty minutes to move from where we first saw it to pretty much our zenith."
After studying it for a while through an 8-inch telescope, Bogardus noticed two points of light, "... like a satellite would appear, in line and above a jet of gas that seemed to come from them."
Observing from Ithaca, New York, Joseph Storch used 7×50 binoculars on the cloud and reported a star-like point or nucleus and four butterfly shaped petals radiating outward. Other reports, received as far west as Toronto, tell of people who initially thought that what they were seeing was the moon behind a cloud. Typical was the comment: "For a second I thought it was the moon, then I realized the moon was in the east."
What was it?
Quite a few people who saw this strange, expanding cloud thought that it might have been an atmospheric experiment sent aloft by a sounding rocket. Over the years, those living along the East Coast have been accustomed to occasionally seeing unusual brightly colored clouds caused when exotic chemicals such as barium and trimethylaluminum were released into the Earth’s ionosphere by rockets launched from NASA’s Wallops Island, Virginia site.
NASA was indeed responsible for the unusual cloud formation on Tuesday night, but it was not part of a planned experiment.
It was, in reality, a fuel dump of the Centaur stage involved in the NRO-1 satellite launch from Cape Canaveral late Tuesday afternoon. Dumping excess fuel is the usual practice for all Centaur-booster assisted launches. It happens after spacecraft separation; the fuel bleeding off from a Centaur upper rocket stage on its second orbit after launch. Being just after nightfall, the cloud of fuel was still sunlit at that altitude.
And those who were fortuitously outside when the dump occurred, were the ones who saw this very unusual sight!
The unusual sight lasted ______.
选项
A、about ten minutes
B、about half an hour
C、about half a day
D、about a whole day
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/PDsO777K
本试题收录于:
BEC中级阅读题库BEC商务英语分类
0
BEC中级阅读
BEC商务英语
相关试题推荐
•Lookatthestatementsbelowandatthefiveextractsfromanarticleaboutlossofcontroldownwardinmanagement.•Whicharti
•Lookatthestatementsbelowandatthefiveextractsfromanarticleaboutlossofcontroldownwardinmanagement.•Whicharti
•ReadthefollowingprofileofBrucePetter,thenewDirectoroftheManagementConsultantsAssociation(MCA),andthequestion
•Lookatthestatementsbelowandatthefiveextractsontheoppositepagefromtheannualreportsoffivemobilephonecompan
Whyshouldjob-seekerscareaboutapotentialemployer’scorporateculture?Aren’ttheremoreimportantfactorstoconsider,(2
MotivateyouremployeeslikeJackWelchIjustreturnedfromspeakingtohospitalityexecutivesinOsloandAmsterdamaspar
ReadthefollowingarticleaboutCTO(ChiefTechnologyOfficer)andthequestions.Foreachquestion(15-20),markoneletter(
ReadthefollowingarticleaboutCTO(ChiefTechnologyOfficer)andthequestions.Foreachquestion(15-20),markoneletter(
ReadthefollowingarticleaboutCTO(ChiefTechnologyOfficer)andthequestions.Foreachquestion(15-20),markoneletter(
A.MetrisCompanies,Inc.MetrisCompanies,Inc.(MCI)providesfinancialproductsandservicesthroughouttheUnitedStates.It
随机试题
Inflationisn’tnew,butpricerisescanstillshock.IrecentlyholidayedintheHamptons,atonybeachareaoutsideNewYork,
下列疾病所致肺动脉高压时,通气灌注扫描可以表现正常的情况有
A.胸部X线检查见单个薄壁空洞B.胸部X线检查呈大片状阴影,内为单个空洞伴液平C.胸部X线检查有偏心空洞,内壁凸凹不平D.胸部X线检查上肺有小片状阴影伴空洞E.胸部X线检查呈大片状阴影,呈肺叶或肺段分布肺炎球菌肺炎
A.病因不清,多种因素作用B.真菌感染C.局部刺激D.长期使用激素、免疫力降低、婴幼儿E.病毒感染雪口病的病因()
剪应力互等原理适用于()。
等直径网管中的层流,其过流断面平均流速是网管中最大流速的多少倍?()
票据丧失后可以采取挂失止付、公示催告、普通诉讼等形式进行补救。()
与秦汉史学相比,唐代史学的特点是()①产生了第一部史论专著②出现了典章制度的专史③确立了官修正史的制度④首创了纪传体通史巨编
药剂师甲明知不含毒品成分的药品已经过期失效,仍冒充为毒品卖给乙,乙将“毒品”卖给吸毒人员。本案中()。(2014一专一17)
请编写一个函数fun,它的功能是:找出一维整型数组元素中最大的值和它所在的下标,最大的值和它所在的下标通过形参传回。数组元素中的值已在主函数中赋予。主函数中x是数组名,n是x中的数据个数,max存放最大值,index存放最大值所在元素的下标。
最新回复
(
0
)