James Webb Space Telescope has enough fuel for way more than 10 years of science
It's thanks to a super-precise launch, NASA says.
NASA's newest flagship space observatory should have enough fuel to more than double its minimum mission life peering into the history of the universe, according to an agency update. http://www.space.com/james-webb-space-telescope-fuel-lifetime
【 在 Manta (hehe) 的大作中提到: 】 : 发射精准，燃料够用20年！ : : James Webb Space Telescope has enough fuel for way more than 10 years of : science : : It's thanks to a super-precise launch, NASA says. : : NASA's newest flagship space observatory should have enough fuel to more : than double its minimum mission life peering into the history of the : universe, according to an agency update. : : http://www.space.com/james-webb-space-telescope-fuel-lifetime
This afternoon, the #Webb team successfully extended the observatory’s Deployable Tower Assembly. This step furthers the team’s progress in deploying Webb’s sunshield – a human-controlled, multi-day process. Details: https://blogs.nasa.gov/webb/2021/12/29/webbs-deployable-tower- assembly-extends-in-space/
成功意义重大。The tale of nations coming together for a common ambition.
A World Divided by Covid and Other Ills United to Explore Space
And while the pandemic snarled supply chains around the world, no lockdown could derail the telescope’s trajectory to the stars: Parts were assembled across multiple nations, then tested in the United States and the final product ended up on a launchpad in French Guiana before being hurtled into outer space on Christmas Day.
In some ways, the James Webb Space Telescope told a story seldom heard these days: the tale of nations coming together for a common ambition. At a time when countries are divided over climate change, migration and a disease that has killed millions, the spacecraft — launched to search for habitable planets and to seek out the earliest, most distant stars and galaxies — was a potent reminder that international cooperation on grand-scale projects was still possible.
【 在 Manta (hehe) 的大作中提到: 】 : 成功意义重大。The tale of nations coming together for a common ambition. : A World Divided by Covid and Other Ills United to Explore Space : And while the pandemic snarled supply chains around the world, no lockdown : could derail the telescope’s trajectory to the stars: Parts were assembled : across multiple nations, then tested in the United States and the final : product ended up on a launchpad in French Guiana before being hurtled into : outer space on Christmas Day. : In some ways, the James Webb Space Telescope told a story seldom heard these : days: the tale of nations coming together for a common ambition. At a time : when countries are divided over climate change, migration and a disease that : ...................
【 在 PBSNPR (大刀王五) 的大作中提到: 】 : 本来以为人类看不到宇宙起源的地方。 : : 想不到有生之年可以看到了。 : : : 【 在 Manta (hehe) 的大作中提到: 】 : : 成功意义重大。The tale of nations coming together for a common ambition.: : A World Divided by Covid and Other Ills United to Explore Space : : And while the pandemic snarled supply chains around the world, no lockdown : : could derail the telescope’s trajectory to the stars: Parts were : assembled : : across multiple nations, then tested in the United States and the final : : product ended up on a launchpad in French Guiana before being hurtled into : : outer space on Christmas Day. : : In some ways, the James Webb Space Telescope told a story seldom heard : these : : days: the tale of nations coming together for a common ambition. At a : time : : when countries are divided over climate change, migration and a disease : that : : ...................
NASA Webb Telescope @NASAWebb · 2h Today we start tensioning the most Sun-facing layer of #NASAWebb's 5-layer, tennis court-sized sunshield. Read in depth how our sunshield works.
NASA Webb Telescope @NASAWebb · 10m Can you feel the tension? Webb is feeling it...in a good way! We tensioned 3 of 5 sunshield layers yesterday. Today we start with Layer 4: https://blogs.nasa.gov/webb/2022/01/04/tensioning-begins-for-two-layers-of-webbs- sunshield/
Follow along LIVE for the final layer starting ~9:30 am ET (14:30 UTC): http://nasa.gov/live #UnfoldTheUniverse
NASA Webb Telescope @NASAWebb · 57m We just tensioned #NASAWebb’s sunshield some more, that was Layer 4. Now everybody look alive, it’s time to tension Layer 5! And better yet — keep watching along live: http://nasa.gov/live #UnfoldTheUniverse
NASA Webb Telescope @NASAWebb · 3h We just finished deploying our sunshield today, but wait, there's more!
#NASAWebb's secondary mirror is planned to be unfolded tomorrow, Jan. 5th, in the morning (Eastern time). Read more at the blog: https://go.nasa.gov/ 3HAJDmD #UnfoldTheUniverse
NASA Webb Telescope @NASAWebb · 10m CONFIRMED: “The world’s most sophisticated tripod” has not only deployed but also latched!
Each of the struts for this tripod, which helps #NASAWebb’s secondary mirror direct light into the instruments, is about 25 feet long (7.6 m)! http://blogs.nasa.gov/webb #UnfoldTheUniverse
韦伯望远镜冷热面的温度出来了
热面 20-90 华氏
冷面 负71-244 华氏
证明防热罩发挥功能了
https://webb.nasa.gov/content/webbLaunch/whereIsWebb.html
红外望远镜，要求温度越低越好，背景噪声低。所以防热罩对韦伯望远镜的功能至关重要。
必须保持镜片和科学仪器低于50 K（−220 °C；−370 °F），要求很高，每步都是关键。
【 在 PBSNPR (大刀王五) 的大作中提到: 】
: 红外望远镜，要求温度越低越好，背景噪声低。所以防热罩对韦伯望远镜的功能至关重
: 要。
现在是-244 °F
在接下来5天内，5层防热薄膜要完成升起分层。
【 在 Manta (hehe) 的大作中提到: 】
: 必须保持镜片和科学仪器低于50 K（−220 °C；−370 °F），要求很高，
: 每步都是关键。
发射精准，燃料够用20年！
James Webb Space Telescope has enough fuel for way more than 10 years of
science
It's thanks to a super-precise launch, NASA says.
NASA's newest flagship space observatory should have enough fuel to more
than double its minimum mission life peering into the history of the
universe, according to an agency update.
http://www.space.com/james-webb-space-telescope-fuel-lifetime
有人扎针失败了？
【 在 Manta (hehe) 的大作中提到: 】
: 发射精准，燃料够用20年！
:
: James Webb Space Telescope has enough fuel for way more than 10 years of
: science
:
: It's thanks to a super-precise launch, NASA says.
:
: NASA's newest flagship space observatory should have enough fuel to more
: than double its minimum mission life peering into the history of the
: universe, according to an agency update.
:
: http://www.space.com/james-webb-space-telescope-fuel-lifetime
vhttps://www.youtube.com/v/QeiQEG450gc
农业国农民的针的质量够呛。
【 在 dinassor (牛磨王) 的大作中提到: 】
: 有人扎针失败了？
人类真了不起，我们的思维也是无穷无尽的，much like this universe.
人类就是这个宇宙的产物。
特点是不停地淘汰自己的劣质产物。
腊肉警告过兲朝可能会被开除球籍。
【 在 Wodelixiang () 的大作中提到: 】
: 人类真了不起，我们的思维也是无穷无尽的，much like this universe.
This afternoon, the #Webb team successfully extended the observatory’s
Deployable Tower Assembly. This step furthers the team’s progress in
deploying Webb’s sunshield – a human-controlled, multi-day process.
Details: https://blogs.nasa.gov/webb/2021/12/29/webbs-deployable-tower-
assembly-extends-in-space/
又完成一步：Aft Momentum Flap
继续扎。。。
【 在 PBSNPR (大刀王五) 的大作中提到: 】
: 又完成一步：Aft Momentum Flap
:
:
韦伯望远镜展开的时间表
vhttps://www.youtube.com/v/RzGLKQ7_KZQ
vhttps://www.youtube.com/v/7PHvDj4TDfM
温度探测点有4个
热面和冷面各2个。
成功意义重大。The tale of nations coming together for a common ambition.
A World Divided by Covid and Other Ills United to Explore Space
And while the pandemic snarled supply chains around the world, no lockdown
could derail the telescope’s trajectory to the stars: Parts were assembled across multiple nations, then tested in the United States and the final
product ended up on a launchpad in French Guiana before being hurtled into
outer space on Christmas Day.
In some ways, the James Webb Space Telescope told a story seldom heard these days: the tale of nations coming together for a common ambition. At a time when countries are divided over climate change, migration and a disease that has killed millions, the spacecraft — launched to search for habitable
planets and to seek out the earliest, most distant stars and galaxies — was a potent reminder that international cooperation on grand-scale projects
was still possible.
With cooperation, however, has come competition as well. China, which did
not participate in the project, is intending to launch its own space
telescope expected to be a kind of competitor.
http://www.nytimes.com/2021/12/30/world/europe/webb-telescope-launch-space.html
【 在 Manta (hehe) 的大作中提到: 】
: 观测能力远超前辈！在探索宇宙的路上，又迈出了新的一步！
: 希望后面的工作也顺利展开，我帝也能恢复一下元气。
进展很快嘛
本来以为人类看不到宇宙起源的地方。
想不到有生之年可以看到了。
【 在 Manta (hehe) 的大作中提到: 】
: 成功意义重大。The tale of nations coming together for a common ambition.
: A World Divided by Covid and Other Ills United to Explore Space
: And while the pandemic snarled supply chains around the world, no lockdown
: could derail the telescope’s trajectory to the stars: Parts were
assembled
: across multiple nations, then tested in the United States and the final
: product ended up on a launchpad in French Guiana before being hurtled into
: outer space on Christmas Day.
: In some ways, the James Webb Space Telescope told a story seldom heard
these
: days: the tale of nations coming together for a common ambition. At a
time
: when countries are divided over climate change, migration and a disease
that
: ...................
如何确定望远镜收到的红外线辐射是来自宇宙起源的地方呢？
【 在 PBSNPR(大刀王五) 的大作中提到: 】
: 本来以为人类看不到宇宙起源的地方。
: 想不到有生之年可以看到了。
: assembled
: these
: time
: that
距离吧？
【 在 mj1209 () 的大作中提到: 】
: 如何确定望远镜收到的红外线辐射是来自宇宙起源的地方呢？
:
: 本来以为人类看不到宇宙起源的地方。
:
: 想不到有生之年可以看到了。
:
: assembled
:
: these
:
: time
:
: that
:
NASA在做实况转播，太阳罩子展开
vhttps://www.youtube.com/v/YtPLPdKHhe0
直升机是三妹的idea，三个三妹最擅长这个，公关一流实用为零。
【 在 Manta (hehe) 的大作中提到: 】
: 嫦娥3，4，5的成功，土鳖在探月上连创新高度新纪录，探火上也是一发达成前所未有
: 多个目标。相反，美帝似乎迷失方向，早早登火，到现在却还搞个华而不实的直升机，
: 坐失采样返回的良机。韦伯也是巨资。
:
: 【 在 wugongpanda (离岸爱国主义大师) 的大作中提到: 】
: : 啥叫人类命运共同体， 啥叫文明的灯塔。
: : 韦伯望远镜让我们看清，谁是卖口条扯淡，谁是真抓实干。
科盲，光学望远镜最多是能把第一批恒星诞生的时刻看的清楚点，连last scattering surface 都还没到，里“宇宙起源”差远了去了。
【 在 PBSNPR (大刀王五) 的大作中提到: 】
: 本来以为人类看不到宇宙起源的地方。
:
: 想不到有生之年可以看到了。
:
:
: 【 在 Manta (hehe) 的大作中提到: 】
: : 成功意义重大。The tale of nations coming together for a common ambition.: : A World Divided by Covid and Other Ills United to Explore Space
: : And while the pandemic snarled supply chains around the world, no
lockdown
: : could derail the telescope’s trajectory to the stars: Parts were
: assembled
: : across multiple nations, then tested in the United States and the final : : product ended up on a launchpad in French Guiana before being hurtled
into
: : outer space on Christmas Day.
: : In some ways, the James Webb Space Telescope told a story seldom heard
: these
: : days: the tale of nations coming together for a common ambition. At a
: time
: : when countries are divided over climate change, migration and a disease : that
: : ...................
宇宙起源个屁。
宇宙起源包括好几个阶段：
奇点部分，目前理论未知也观察不到。
大爆涨阶段，可以通过宇宙背景辐射做一些间接观测。这段时间宇宙从一个点按指数膨胀到宏观尺度，但还没有出现现在已知的各种物质。
reheating 阶段，这是宇宙由暴涨能量，也就是所谓的inflaton转向已知物质的阶段。宇宙温度也达到最高。
接下去才是原初重子形成阶段，英语叫Baryongenesis，一般民科理解的所谓“宇宙大
爆炸”其实指的都是这个阶段，
last scattering surface, 等到宇宙逐渐冷却到一定程度，质子和自由电子终于可以
结合成为氢原子，由于自由电子的减少，宇宙才第一次变成透明的，光波可以长程传播，所以这个阶段是所有光学观测所能达到的极限。
这以后氢原子原子在重力作用下逐渐聚合才出现第一批恒星。
韦伯望远镜充其量只能把宇宙最早期形成到恒星看得更清楚一些。可以有一些有趣的发现，对早期恒星诞生领域提供一些细节，但很明显这和宇宙诞生的问题比起来都是细枝末节，对早期宇宙如何形成，大爆涨如何发生，甚至是Baryongrnesis这些发生在last scattering surface之前的事情则毫无用途。
【 在 mj1209 () 的大作中提到: 】
: 如何确定望远镜收到的红外线辐射是来自宇宙起源的地方呢？
:
:
: 【 在 PBSNPR(大刀王五) 的大作中提到: 】
: : 本来以为人类看不到宇宙起源的地方。
: : 想不到有生之年可以看到了。
: : assembled
: : these
: : time
: : that
詹姆斯韦伯太空望远镜的五层遮阳板正在进入依次打开的程序。这是整个展开过程难度最大的部分的开始。全球航天宅们都捏把汗
防热罩已经全部打开，接下来要把5层薄膜升起，完成绝热功能。
接下来就是主镜面和副镜面对接的重头戏了。
太阳罩子的工作原理。
米帝就是自信，从头到尾转播微博望远镜的发射至投入的过程。
进入正轨。昨天延迟了一下。
NASA Webb Telescope
@NASAWebb
·
2h
Today we start tensioning the most Sun-facing layer of #NASAWebb's 5-layer, tennis court-sized sunshield. Read in depth how our sunshield works.
延迟一天其实是给蓄电池充电，同时地面模拟一下最后展开步骤。
这个望远镜只有一片太阳能电池板，我看有点不够机械展开，当然望远镜运行没有问题。
【 在 Manta (hehe) 的大作中提到: 】
: 进入正轨。昨天延迟了一下。
: NASA Webb Telescope
: @NASAWebb
: ·
: 2h
: Today we start tensioning the most Sun-facing layer of #NASAWebb's 5-layer,
: tennis court-sized sunshield. Read in depth how our sunshield works.
First Layer of Webb’s Sunshield Tightened!
NASA Webb Telescope
@NASAWebb
·
1h
“Onions have layers. Ogres have layers.” And so does our sunshield!
Layer 1 of our 5-layer sunshield is now pulled taut, getting us even closer on our journey to #UnfoldTheUniverse. We have begun tensioning Layer 2
【 在 ABCNBC (小李飞刀) 的大作中提到: 】
: 延迟一天其实是给蓄电池充电，同时地面模拟一下最后展开步骤。
: 这个望远镜只有一片太阳能电池板，我看有点不够机械展开，当然望远镜运行没有问题。
继续扎
【 在 ABCNBC (小李飞刀) 的大作中提到: 】
: 延迟一天其实是给蓄电池充电，同时地面模拟一下最后展开步骤。
:
: 这个望远镜只有一片太阳能电池板，我看有点不够机械展开，当然望远镜运行没有问题。
:
:
: 【 在 Manta (hehe) 的大作中提到: 】
: : 进入正轨。昨天延迟了一下。
: : NASA Webb Telescope
: : @NASAWebb
: : ·
: : 2h
: : Today we start tensioning the most Sun-facing layer of #NASAWebb's 5-
layer
: ,
: : tennis court-sized sunshield. Read in depth how our sunshield works.
NASA Webb Telescope
@NASAWebb
·
1h
The layers start coming and they don’t stop coming…
Layers 2 and 3 are now complete! Tensioning for the final two layers of Webb’s 5-layer sunshield is planned for tomorrow.
太阳版展开显示的是美帝和西欧精密机械能力。
但好像最大黑科技在于cyocooler压缩机，尖端物理学和工程学的完美结合。
在这方面，菌斑的专家又是弃婴同学。
下面有请美国国家实验室联合总工程师、中国科学院特聘首席科学家，菌斑科学普及第一人弃婴博士展开说说。
NASA Webb Telescope
@NASAWebb
·
10m
Can you feel the tension? Webb is feeling it...in a good way! We tensioned 3 of 5 sunshield layers yesterday. Today we start with Layer 4: https://blogs.nasa.gov/webb/2022/01/04/tensioning-begins-for-two-layers-of-webbs-
sunshield/
Follow along LIVE for the final layer starting ~9:30 am ET (14:30 UTC): http://nasa.gov/live #UnfoldTheUniverse
NASA Webb Telescope
@NASAWebb
·
57m
We just tensioned #NASAWebb’s sunshield some more, that was Layer 4. Now
everybody look alive, it’s time to tension Layer 5! And better yet — keep watching along live: http://nasa.gov/live #UnfoldTheUniverse
vhttps://www.youtube.com/v/IBPNi7uGgWM
遮阳罩拉紧完全成功！
NASA Webb Telescope
@NASAWebb
·
17s
This is it: we’ve just wrapped up one of the most challenging steps of our journey to #UnfoldTheUniverse.
With all five layers of sunshield tensioning complete, about 75% of our 344 single-point failures have been retired!
Sunshield Tensioning Complete
The Sunshield is Fully Deployed!
【 在 Manta (hehe) 的大作中提到: 】
: 遮阳罩拉紧完全成功！
了不起
【 在 PBSNPR (null) 的大作中提到: 】
: Sunshield Tensioning Complete
: The Sunshield is Fully Deployed!
:
:
: 【 在 Manta (hehe) 的大作中提到: 】
: : 遮阳罩拉紧完全成功！
解决了117个零零星星的小故障。
【 在 Wodelixiang () 的大作中提到: 】
: 了不起
【 在 dinassor (牛磨王) 的大作中提到: 】
: 继续扎
: 题。
: layer
这个氦制冷机不是大问题，核磁共振仪用的氦制冷机就是同类型的。
目前要把韦伯望远镜温度拉到7K，需要几个月的时间
【 在 dIdT (星垂平野阔) 的大作中提到: 】
: 太阳版展开显示的是美帝和西欧精密机械能力。
: 但好像最大黑科技在于cyocooler压缩机，尖端物理学和工程学的完美结合。
: 在这方面，菌斑的专家又是弃婴同学。
: 下面有请美国国家实验室联合总工程师、中国科学院特聘首席科学家，菌斑科学普及第
: 一人弃婴博士展开说说。
米帝的水平，不得不服帖。
NASA Webb Telescope
@NASAWebb
·
3h
We just finished deploying our sunshield today, but wait, there's more!
#NASAWebb's secondary mirror is planned to be unfolded tomorrow, Jan. 5th,
in the morning (Eastern time). Read more at the blog: https://go.nasa.gov/
3HAJDmD #UnfoldTheUniverse
三脚架完全支好，锁定好了。
NASA Webb Telescope
@NASAWebb
·
10m
CONFIRMED: “The world’s most sophisticated tripod” has not only deployed but also latched!
Each of the struts for this tripod, which helps #NASAWebb’s secondary
mirror direct light into the instruments, is about 25 feet long (7.6 m)! http://blogs.nasa.gov/webb #UnfoldTheUniverse