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[任务跟踪] 深空探测器之:Voyager(旅行者-1/2)(航海者):NASA正式宣布旅行者一号进入星际空间!

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hkhtg090201 发表于 2010-2-13 18:04 | 显示全部楼层 |阅读模式

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本帖最后由 hkhtg090201 于 2013-9-13 08:25 编辑

++2013-08-19  有关飞出太阳系的一些判定观点:
       NASA科学家们此前表示,核实“旅行者1号”已飞出太阳系的边缘只需要关注3件事:来自太阳系以外的高能量宇宙射线增多;来自太阳的带电粒子的能量水平降低;飞船上磁场方向变化
  

------------以下:发贴时内容---------------------
   1977年8-9月发射。
    更多:...
 楼主| hkhtg090201 发表于 2010-2-13 18:07 | 显示全部楼层
Voyager Celebrates 20-Year-Old Valentine to Solar System

Published by Klaus Schmidt on Sat Feb 13, 2010 4:32 am via: NASA Share
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    NASA, Voyager 1(NASA) – Twenty years ago on February 14, NASA’s Voyager 1 spacecraft had sailed beyond the outermost planet in our solar system and turned its camera inward to snap a series of final images that would be its parting valentine to the string of planets it called home.

Mercury was too close to the sun to see, Mars showed only a thin crescent of sunlight, and Pluto was too dim, but Voyager was able to capture cameos of Neptune, Uranus, Saturn, Jupiter, Earth and Venus from its unique vantage point. These images, later arranged in a large-scale mosaic, make up the only family portrait of our planets arrayed about the sun.


These six narrow-angle color images were made from the first ever 'portrait' of the solar system taken by Voyager 1, which was more than 4 billion miles from Earth and about 32 degrees above the ecliptic. Image credit: NASA/JPL
The Apollo missions in the 1960s and 70s had already altered our perspective of Earth by returning images of our home planet from the moon, but Voyager was providing a completely new perspective, said Ed Stone, Voyager project scientist at the California Institute of Technology in Pasadena.

“It captured the Earth as a speck of light in the vastness of the solar system, which is our local neighborhood in the Milky Way galaxy, in a universe replete with galaxies,” Stone said.

In the years since the twin Voyager spacecraft were launched in 1977, they had already sent back breathtaking, groundbreaking pictures of the gas giants Jupiter, Saturn, Uranus and Neptune. It took Voyager 1 more than 12 years to reach the place where it took the group portrait, 6 billion kilometers (almost 4 billion miles) away from the sun. The imaging team started snapping images of the outer planets first because they were worried that pointing the camera near the sun would blind it and prevent more picture-taking.

Candy Hansen, a planetary scientist based at NASA’s Jet Propulsion Laboratory in Pasadena, Calif., who worked with the Voyager imaging team at the time, remembers combing through the images and finally finding the image of Earth. She had seen so many pictures over the years that she could distinguish dust on the lens from the black dots imprinted on the lens for geometric correction.

There was our planet, a bright speck sitting in a kind of spotlight of sunlight scattered by the camera. Hansen still gets chills thinking about it.

“I was struck by how special Earth was, as I saw it shining in a ray of sunlight,” she said. “It also made me think about how vulnerable our tiny planet is.”

This was the image that inspired Carl Sagan, the the Voyager imaging team member who had suggested taking this portrait, to call our home planet “a pale blue dot.”

As he wrote in a book by that name, “That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. … There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world.”

After these images were taken, mission managers started powering down the cameras. The spacecraft weren’t going to fly near anything else, and other instruments that were still collecting data needed power for the long journey to interstellar space that was ahead.

The Voyagers are still transmitting data daily back to Earth. Voyager 1 is now nearly 17 billion kilometers (more than 10 billion miles) away from the sun. The spacecraft have continued on to the next leg of their interstellar mission, closing in on the boundary of the bubble created by the sun that envelops all the planets. Scientists eagerly await the time when the Voyagers will leave that bubble and enter interstellar space.

“We were marveling at the vastness of space when this portrait was taken, but 20 years later, we’re still inside the bubble,” Stone said. “Voyager 1 may leave the solar bubble in five more years, but the family portrait gives you a sense of the scale of our neighborhood and that there is a great deal beyond it yet to be discovered.”

The Voyagers were built by JPL, which continues to operate both spacecraft. Caltech manages JPL for NASA.
微波背景辐射 发表于 2010-2-13 20:41 | 显示全部楼层
??没内容··
 楼主| hkhtg090201 发表于 2010-2-14 11:58 | 显示全部楼层
无奈,纯英文,也要审核:
Voyager Celebrates 20-Year-Old Valentine to Solar System

引自:
http://spacefellowship.com/news/ ... o-solar-system.html
Spica 发表于 2010-2-16 07:56 | 显示全部楼层
这俩还真是经典啊,幸好89年飞越海王星的时候我会看电视了
 楼主| hkhtg090201 发表于 2010-5-8 21:27 | 显示全部楼层
科学: 航海家二号在太阳系边缘发回无法破译的信息
2010年5月08日
   
   33岁的航海家二号已经飞到了距离地球138亿公里的地方,根据5月1日接受到的最新工程数据,它的硬件看起来都能正常工作,但是它的飞行数据系统——在信息传输回地球之前进行格式化处理——却出现了小问题,数据模式被改变了,因此地球无法破译接收到的科学数据。不过工程数据没出错。
问题第一次被发现是在4月22日,工程师注意到数据模式发生了变化。此后他们开始致力于修复错误,在4月30日开始向航海家二号发送新的指令,信号从地球发送到飞船需要花13个小时,然后再需要13小时NASA的深空网监听天线才能接收到回应。工程师认为错误发生在储存格式化数据的存储器中。重置坏的存储器,或者对系统重新编程以停止使用有问题的硬件,仍然是可能的。航海家二号是目前飞行第二远的人造飞行器,它最初是设计执行4年的任务,然而33年后它仍然向地球发回数据。航海家一号已经飞行到了距离地球169亿公里的地方。
 楼主| hkhtg090201 发表于 2010-5-12 21:37 | 显示全部楼层
管理人员认为 Voyager 2 可以被恢复
Managers optimistic Voyager 2 can be restored to duty
BY STEPHEN CLARK
SPACEFLIGHT NOW
Posted: May 11, 2010


The Voyager 2 spacecraft hurtling toward the edge of the solar system is no longer returning useful science data, NASA announced last week, but officials are optimistic they can fix the formatting glitch believed to be causing the problem.

........

http://www.spaceflightnow.com/news/n1005/11voyager2/
 楼主| hkhtg090201 发表于 2010-5-15 07:54 | 显示全部楼层
美宇宙飞船传回怪信号 德专家称恐遭外星人挟持

2010年05月14日 11:30  中国新闻网

  中新网5月14日电 据台湾“今日新闻网”14日报道,德国《画报》(Bild)近日报道知名幽浮研究专家豪斯多夫宣称,美国国家航天总署(NASA)在33年前发射升空的“航海家二号”(Voyager 2),日前竟开始传回难以理解的怪异信号,疑似遭外星人挟持。豪斯多夫甚至大胆猜测,这可能是外星生命尝试与人类对话的征兆。

  1977年8月20日,航海家二号升空,两周后航海家一号也跟随发射升空,共同探测木星、土星、天王星及海王星;目前两艘宇宙飞船已抵达太阳系边缘附近,分别距地球138亿公里及169亿公里,是外层空间中距离地球最远的人造物体。

  由于当年NASA曾在航海家一号上安装了一片12吋盘片,里头含有各种音乐及55种语言的问候语,作为和外星生命相遇时沟通之用;豪斯多夫透露,航海家二号在上个月突然开始传回一些怪异讯号,“看来好像有人重新改编它的程序,或劫持了这具飞行器。”

  对此,NASA科学家除了大吃一惊之外,至今仍无法加以译码判读。据悉,航海家二号发送的信号得花上13小时才能传回地球;NASA表示,航海家二号传送的讯号是从2月22日起中断,目前正由技术人员修复中。对于豪斯多夫的大胆推测,NASA并未直接多做评论,只说可能是航海家二号本身的计算机内存出了问题。
cmj9808 发表于 2010-5-15 12:09 | 显示全部楼层
本帖最后由 cmj9808 于 2010-5-15 12:13 编辑

知名幽浮研究专家...

美国行星学会的Ms.Lakdawalla的blog里提到了任务专家Ed Stone给出的故障原因和解决方案,文章同时介绍了关于Voyager 2的很多有价值的信息,包括目前的科学任务等。

http://www.planetary.org/blog/article/00002485/
cmj9808 发表于 2010-5-18 20:37 | 显示全部楼层
JPL的工程师找到了Voyager 2信号异常的原因,和预期一样,存贮器上的一个字节从0变成了1,预计5月19日将重置该字节

Updated May 17, 2010 at 5:00 PT.

One flip of a bit in the memory of an onboard computer appears to have caused the change in the science data pattern returning from Voyager 2, engineers at NASA's Jet Propulsion Laboratory said Monday, May 17. A value in a single memory location was changed from a 0 to a 1.

On May 12, engineers received a full memory readout from the flight data system computer, which formats the data to send back to Earth. They isolated the one bit in the memory that had changed, and they recreated the effect on a computer at JPL. They found the effect agrees with data coming down from the spacecraft. They are planning to reset the bit to its normal state on Wednesday, May 19.

http://jpl.nasa.gov/news/news.cfm?release=2010-151
adjust 发表于 2010-5-19 11:53 | 显示全部楼层
想起了星际迷航电影版第一部
 楼主| hkhtg090201 发表于 2010-5-20 09:44 | 显示全部楼层
NASA发现了导致航海家二号发生故障的原因
2010年5月19日

本月初,NASA的工程师怀疑航海家二号的科学仪器发生了故障,在信息传输回地球之前进行格式化处理的飞行数据系统出现了问题,它发回的信息根本无法破译。
   现在,工程师在实验室中重现了错误,显示是记忆体中的一个位翻转(bit flip)导致的,也就是一个比特错误的从a 0变成了a 1。导致这一错误的原因目前还不清楚,NASA计划在今天向航海家二号发送命令,重置记忆体。信号从地球发送到飞船需要花13个小时
cmj9808 发表于 2010-5-22 19:51 | 显示全部楼层
JPL的工程师成功修复Voyager 2存储器故障,顺利的话预计Voyager 2最早于5月23日退出安全模式,重新开始发送科学数据

Engineers have successfully corrected the memory on NASA's Voyager 2 spacecraft by resetting a computer bit that had flipped. Reset commands were beamed up to the spacecraft yesterday, Wed., May 19, and engineering data received today confirm that the reset was successful. The Voyager team will continue monitoring the engineering data, and if the bit remains reset, commands to switch to the science data mode will be beamed up to Voyager 2 on Sat., May 22. Receipt of science data would then resume on Sun., May 23.
铁人 发表于 2010-6-3 01:32 | 显示全部楼层
这种低技术航天器,只怕外星人不感兴趣
头像被屏蔽
a123s 发表于 2010-6-3 11:42 | 显示全部楼层
提示: 作者被禁止或删除 内容自动屏蔽
 楼主| hkhtg090201 发表于 2010-6-3 11:52 | 显示全部楼层
回复 15# a123s


    好像要2014-2016年间,才真正出太阳系(出太阳风梢)。
头像被屏蔽
a123s 发表于 2010-6-4 17:37 | 显示全部楼层
提示: 作者被禁止或删除 内容自动屏蔽
cslqc2010 发表于 2010-6-4 18:25 | 显示全部楼层
希望他们能传回有价值的信息,呵呵,向遥远远远的朋友问好
jingyan66 发表于 2010-6-29 09:24 | 显示全部楼层

至6月28日,Voyager-2(“旅行者”-2)已经持续工作了12,000天了

Voyager 2 at 12,000 Days: The Super-Marathon Continues


June 28, 2010


NASA's plucky Voyager 2 spacecraft has hit a long-haul operations milestone today (June 28) -- operating continuously for 12,000 days. For nearly 33 years, the venerable spacecraft has been returning data about the giant outer planets, and the characteristics and interaction of solar wind between and beyond the planets. Among its many findings, Voyager 2 discovered Neptune's Great Dark Spot and its 450-meter-per-second (1,000-mph) winds.

The two Voyager spacecraft have been the longest continuously operating spacecraft in deep space. Voyager 2 launched on August 20, 1977, when Jimmy Carter was president. Voyager 1 launched about two weeks later on Sept. 5. The two spacecraft are the most distant human-made objects, out at the edge of the heliosphere -- the bubble the sun creates around the solar system. Mission managers expect Voyager 1 to leave our solar system and enter interstellar space in the next five years or so, with Voyager 2 on track to enter interstellar space shortly after that.

Having traveled more than 21 billion kilometers (13 billion miles) on its winding path through the planets toward interstellar space, the spacecraft is now nearly 14 billion kilometers (9 billion miles) from the sun. A signal from the ground, traveling at the speed of light, takes about 12.8 hours one-way to reach Voyager 2.

Voyager 1 will reach this 12,000-day milestone on July 13, 2010 after traveling more than 22 billion kilometers (14 billion miles). Voyager 1 is currently more than 17 billion kilometers (11 billion miles) from the sun.

The Voyagers were built by JPL, which continues to operate both spacecraft. Caltech manages JPL for NASA.

For more information about the Voyagers, visit: http://voyager.jpl.nasa.gov/.

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jingyan66 发表于 2010-7-5 14:32 | 显示全部楼层

“旅行者”系列探测器连续空间飞行12000个地球日

2010年07月05日   腾讯科技   Everettism/编译

腾讯科技讯(Everettism/编译)据国外媒体报道,由美国国家航空航天局喷气推进实验室加州理工学院管理运行的旅行者系列探测器抵达了一个新的赛点---连续空间飞行12000个地球日,这场超级马拉松式的征程还将继续。

在将近33年的时间里,这艘古老的飞船传回了许多地外行星的数据,以及其与太阳风相互作用后的特征。在旅行者2号探测器的众多发现中,包括了1989年8月25日人类首次对海王星的造访。在那次的接触中,发现了位于海王星南半球的沿逆时针方向自传的大黑斑,黑斑的大小大约是木星大红斑的一半,其内部风速高达450米每秒.

到目前为止,两艘旅行者探测器是深空中连续可控运行时间最长,同时也是距离地球最远的人造物体。旅行者二号于1977年8月20日发射,当时的美国总统还是吉米卡特。旅行者一号于两周后发射,9月5日。现在,探测器的位于日光层(太阳气层)的边缘,是由太阳将太阳风(具有带电粒子)吹向太阳系周围产生的日光层气泡,囊括了整个太阳系,是太阳风与星级物质相互作用的边界线。传统理论上认为,由太阳风吹起的日光层是个简单对称的球形,但是旅行者的数据表明,其更近似一个椭圆形,而且位于太阳系南边的日光层气泡被挤压着,对于这个问题,探测器项目组认为可能是由于银河系内部恒星爆炸产生的星际磁场动荡,对太阳系两端作用角度不用,从而呈现出不对称。对探测器的任务预期估计,旅行者一号探测器将在下一个五年左右率先离开太阳系,进入星际空间,旅行者二号则紧随其后,闯荡险象环生的茫茫星际。

旅行者二号探测器迄今已飞行了210亿千米(130亿英里),巧妙地利用行星间的引力向太阳系以外的星际空间飞去,探测器距离太阳140亿千米(90亿英里)。地面控制站的信号要经过12.8小时才能被接收。旅行者一号在飞行了至少220亿千米(140亿英里)后,将在2010年7月13日迎来一个新的里程碑—空间飞行12000个地球日,目前距离太阳170亿千米(110英里)。
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