Archive for the 'Astronomical Instruments' Category
哈勃空间望远镜
我们敬爱的哈勃空间望远镜在发射19年后终于再次被升级了。这次的升级同样是由美国太空总署（NASA）负责，任务代号为STS-125。这次的维修任务4是哈勃最后一次的维修及升级任务，这次执行任务乘坐亚特兰提斯号的太空人将是最后一批亲手接触哈勃的人。这次的任务过后，哈勃预计将工作至2014年，之后会被詹姆士韦伯空间望远镜（主要观测红外波段）。
哈勃空间望远镜现在有了两个新的观测仪器，广角相机3（Wide Field Camera 3 / WFC3）和宇宙起源光谱仪（Cosmic Origins Spectrograph/ COS）。除此之外，它在2007年故障的Advanced Camera for Survey和2004年故障的Space Telescope Imaging Spectrograph也得到了修复并回复工作。新的电池、6个新的陀螺仪、复新的高精度导星感应器、新的外层保护套和一个软捕捉及结合系统也安装到了哈勃上。
WFC3 比广角几行星照相机拥有更高的解析度和视角范围，对于观测研究暗物质、暗能量、恒星的形成和遥远星系有着莫大的帮助。COS则是用来探讨星系的演变、行星的形成、构成生命所需要的元素以及交织在星系间的“宇宙网状”的气体，因为光谱仪能够通过把一束束的光分成个别的谱线，揭示出其所代表的元素。
暗物质存在的证据，哈勃空间望远镜拍摄。
哈勃空间望远镜一直以来往地球传送了不少令人震撼的天文照片及不可思议的天文发现。现在，他的能力得到了大大的提升，相比起之前有了10倍的提升！暗物质和暗能量的秘密或许不久就能揭露，更多的地外行星也将被发现。让我们一起来期待更多令人叹为观止的发现吧！
若你想知道更多关于这次维修任务的细节，请阅读NASA SM4 Essentials。我想每个人都不容错过～
话说，我对太空梭上的唯一女太空人——K. Megan McArthur所拥有的隐私权感到好奇。。。一个女生在6个大男人之间要如何周旋呢。。。
通过矫正镜破裂的8寸LX90所拍摄的衍射图案
Hadar星（半人马座beta星），已经不是一个完美的点状了
矫正镜碎裂的8寸LX90所带来的土星，好像在被黑洞吞噬。。。
现在，换我们的男主角出场～
Did you ever try to break your scope before? I doubt you dare. I maybe the first LX90AT user with the cracked corrector plate.
Here the story begins.
If anyone remembered my previous post about disassembling the LX90AT, you should know why I removed the corrector plate. Yes, I dropped a toothpick into the OTA from the visual back. All of the nightmare started from here. I bought a Purosol Optical (PO below) and their microfiber cloth as I planned to clean the corrector plate. In the end, I cleaned the primary mirror as well because the PO claimed that the solution was enzyme based and would not hurt the coating. That’s true, just that the microfiber cloth left quite a lot of fiber behind.
Continue reading ‘LX90的矫正镜破碎了’
伽利略望远镜™在伽利略望远镜官方站网开始发售，只售15美金.
什么是伽利略望远镜？为了庆祝2009国际天文年, 一队顶尖的天文学家、光学工程师和科学教育学者主导了价廉物美的望远镜套件。只要15美金，你就能够拥有比伽利略·伽利雷在1609当年所使用还好的望远镜。
If you’re a computer enthusiast, you must be familiar with the benchmark score obtained from 3dMarks, PC Mark, Everest, PCMark, Prime 95 and so on. Is there anything similar to represent the performance of telescope? Well, there’s is and someone did it in the form of scores too.
Credits to Mr.Yoshida Hiroshi, he has done a review on 75 telescopes. He reviewed them visually and scored them. The photographic performance of the telescope is not taken into account. I would say this is just a reference for you but not solely the factor to consider a telescope.
Before buying a telescope, I suggest you read through the reviews posted at forums like cloudynights.com and most importantly, join a stargazing session with someone who already owned a telescope. You will know better what to expect.
Here you read the rankings, cz-telesco.bbs.coocan.jp
The content is in Japanese, you can use Google translator to translate into English or any other language you prefer.
Recent Comments