has already filled Toronto streets with electric-powered Tesla cars, and now he''s filling the skies above Southern Canada with thousands of satellites that will drastically change the views of stargazers. It''s the start of a wave of tech giants launching "constellations" or clusters of small satellites that are forming the beginnings of global internet service networks, including the much-hyped Starlink project from Musk''s SpaceX. Starlink has already launched over 1,700 satellites in the early stages of what has been the most talked-about of these artificial constellations, and the private space contractor has plans to launch a total of 42,000 low-earth-orbit satellites to complete the network. And that''s just one of many satellite constellations in the works.
Hanno Rein, Astrophysics Professor at the University of Toronto and developer of the Exoplanet app, co-penned a report on the issue. He tells blogTO that "of all the operational satellites orbiting the earth, half belong to Starlink," and Musk has only begun to deploy his sprawling communications constellation. These satellites appear in their greatest concentrations along a latitude that includes southern Canada and the Toronto area, Rein saying that we will be the "worst-affected latitude in the world." "If you were further south near the equator, the issue is not as bad because the earth''s shadow will block some of the light during the night," says Rein, "but because we''re so far north, during the summer, these satellites will be illuminated all night long."
But what will these satellites actually look like to the naked eye? Rein says that "in downtown Toronto, they will be hard to spot, and they will not change your experience of the night sky since there''s already a lot of light pollution." Though for anyone living outside of the city in areas with dark skies, Rein says you can expect "quite a significant change," predicting that "one out of every 15 points that you see in the sky will not be a star, but one of those satellites." This is because these satellites reach their northernmost points around this latitude before turning back south. Rein says this means "we''ll see a lot of those satellites because they spend a lot of time in that turning phase." They move across the night sky at perceptible speeds comparable to a commercial airliner traveling at cruising altitude, so they will be pretty noticeable compared to other bright points like stars and planets. Surprisingly, there aren''t any light pollution regulations in place for satellites, Rein explaining that "These companies are exploring new territory without regulations. SpaceX has tried to mitigate some of the light pollution effects by having some sort of visor attached to the satellites that block some of the light, and all this is voluntary." With a vested interest in the night sky, Rein hopes for some kind of regulation to be implemented "to determine how bright satellites can be and to force these companies to think about this effect." Other companies have even grander plans for satellite constellations that would further pollute the night sky with bright, fast-moving objects, but would also vastly improve global internet connectivity.
This simulation shows the summer night sky in Toronto after all 42k planned Starlink/Oneweb/Starnet satellites have been launched. Only satellites with a magnitudes brighter than 6.5 are shown. Note that satellites will be visible all night long. https://t.co/1FRETbm6Pupic.twitter.com/rcxJl4JKJA — Hanno Rein 💫 (@hannorein) December 17, 2021
The effect on the night sky depends on the satellites’ altitude, your location and the season. Near the equator, there will be a time during the night when there are not sunlit satellites overhead. But that’s not the case for Canada. pic.twitter.com/cHqv09ES0g — Hanno Rein 💫 (@hannorein) December 17, 2021
傻子是你吧 They move across the night sky at perceptible speeds comparable to a commercial airliner traveling at cruising altitude 如果折换成商业飞机巡航高度,速度类似洲际民航巡航速度 民航飞机高度10公里左右,中国空间站在近地轨道附近400公里,星链400-500公里 而且这些卫星在折返
https://en.wikipedia.org/wiki/Anti-satellite_weapon#United_States 来,美国这方面的测试了解一下。。。 老美可不光是打卫星,还直接在太空中搞核爆,呵呵。。。。 Starfish Prime was a high-altitude nuclear test conducted by the United States, and was the largest nuclear test conducted in outer space, and one of five conducted by the US in space.
傻子是你吧 They move across the night sky at perceptible speeds comparable to a commercial airliner traveling at cruising altitude 如果折换成商业飞机巡航高度,速度类似洲际民航巡航速度 民航飞机高度10公里左右,中国空间站在近地轨道附近400公里,星链400-500公里 而且这些卫星在折返
Source? 现在我看到的文献都是550km,马斯克确实有计划,将来几万卫星会分不在三个不同高度340km,550km和1150。 但是现在批的只有540-570km 你别光开口,拿文件来看看 The license modification allows SpaceX to change the altitude for 2,814 future Starlink satellites, from the 1,100-1,300 km range to the 540-570 km range. It also modifies the final size of the Starlink constellation by one satellite from 4,409 to 4,408. SpaceX just under 1,400 satellites in orbit at this point.
马斯克已经发射1,700颗卫星,还将发射42,000 近地轨道卫星。
这些卫星在安大略南部纬度开始折返。所以这一纬度是卫星光污染最严重地区,42000颗卫星以民航飞机速度,在天空划下一道一道白线。观测星空基本没有可能。
🔥 最新回帖
有激光打卫星技术。有抓碎其他卫星的卫星。
真长啊
musk就是个大忽悠。迟早有一天那些特斯拉粉会发现这个事实
我也蛮讨厌这个星链的。给天空带来太多的垃圾。这些卫星总得报废吧,musk怎么回收这些卫星?最关键得是,这么多卫星,给未来的航天带来很多潜在风险
他说的应该是相对速度。应该意思是,地面观测人员观看天上卫星在夜空运行的速度,和看到的飞机的运行速度一样
🛋️ 沙发板凳
根据联合国和平利用外层空间委员会官方网站发布的文件显示,中国常驻联合国(维也 纳)代表团12月初向联合国秘书长提交普通照会表示,美国太空探索技术公司(Spacex) 发射的星链卫星,在今年先后两次接近中国空间站,对中国空间站搭载的航天员生命健 康构成危险。出于安全考虑,中国空间站组合体针对有关美国卫星,两次实施“紧急避 碰”。
联合国和平利用外层空间委员会官网的发布信息截图
中方照会部分内容截图 该照会表示, 2021 年,中国载人航天工程实施了5次发射任务,成功将空间站天和核 心舱、天舟二号和天舟三号货运飞船、神舟十二号和神舟十三号载人飞船发射入轨。中 国空间站组合体稳定运行在高度390千米附近的近圆地球轨道,轨道倾角约41.5°。 在此期间,美国太空探索技术公司(SpaceX)发射的星链(star1ink)卫星先后两次接 近中国空间站。出于安全考虑,空间站组合体分别于7月1日和10月21日实施对美国星链 卫星的预防性碰撞规避控制(“紧急避碰”)。具体情况如下: 第一次紧急避碰 美国星链-1095卫星自2020年4月19日起稳定运行在平均高度约555千米的轨道上。2021 年5月16日至6月24日,该卫星持续降轨机动至平均轨道高度382千米后,保持在该轨道 高度运行。7月1日,该卫星与中国空间站间出现近距离接近事件。出于安全考虑,中国 空间站于7月1日晚主动采取紧急避碰,规避了两目标碰撞风险。 第二次紧急避碰 2021年10月21日,美国星链-2305卫星与中国空间站发生近距离接近事件。鉴于该卫星 处于连续轨道机动状态,机动策略未知且无法评估轨道误差,存在与空间站碰撞风险。 为确保在轨航天员安全,中国空间站于当日再次实施紧急避碰,规避了两目标碰撞风险。 该照会指出,中方请联合国秘书长将上述情况周知《外空条约》各缔约国,并提请各缔 约国注意,根据《外空条约》第6条,“各缔约国对其(不论是政府部门,还是非政府 的团体组织)在外层空间(包括月球和其他天体)所从事的活动,要承担国际责任,并 应负责保证本国活动的实施符合本条约的规定。 热门评论
It''s the start of a wave of tech giants launching "constellations" or clusters of small satellites that are forming the beginnings of global internet service networks, including the much-hyped Starlink project from Musk''s SpaceX. Starlink has already launched over 1,700 satellites in the early stages of what has been the most talked-about of these artificial constellations, and the private space contractor has plans to launch a total of 42,000 low-earth-orbit satellites to complete the network. And that''s just one of many satellite constellations in the works.
Hanno Rein, Astrophysics Professor at the University of Toronto and developer of the Exoplanet app, co-penned a report on the issue. He tells blogTO that "of all the operational satellites orbiting the earth, half belong to Starlink," and Musk has only begun to deploy his sprawling communications constellation. These satellites appear in their greatest concentrations along a latitude that includes southern Canada and the Toronto area, Rein saying that we will be the "worst-affected latitude in the world." "If you were further south near the equator, the issue is not as bad because the earth''s shadow will block some of the light during the night," says Rein, "but because we''re so far north, during the summer, these satellites will be illuminated all night long."
But what will these satellites actually look like to the naked eye? Rein says that "in downtown Toronto, they will be hard to spot, and they will not change your experience of the night sky since there''s already a lot of light pollution." Though for anyone living outside of the city in areas with dark skies, Rein says you can expect "quite a significant change," predicting that "one out of every 15 points that you see in the sky will not be a star, but one of those satellites." This is because these satellites reach their northernmost points around this latitude before turning back south. Rein says this means "we''ll see a lot of those satellites because they spend a lot of time in that turning phase."
They move across the night sky at perceptible speeds comparable to a commercial airliner traveling at cruising altitude, so they will be pretty noticeable compared to other bright points like stars and planets. Surprisingly, there aren''t any light pollution regulations in place for satellites, Rein explaining that "These companies are exploring new territory without regulations. SpaceX has tried to mitigate some of the light pollution effects by having some sort of visor attached to the satellites that block some of the light, and all this is voluntary."
With a vested interest in the night sky, Rein hopes for some kind of regulation to be implemented "to determine how bright satellites can be and to force these companies to think about this effect." Other companies have even grander plans for satellite constellations that would further pollute the night sky with bright, fast-moving objects, but would also vastly improve global internet connectivity.
你怕是没看懂,那是星链
军事用途
星链卫星就算坠毁,基本就在大气层烧毁了,不会对地面造成危害。
系统提示:若遇到视频无法播放请点击下方链接
https://www.youtube.com/embed/Y7qkzhQVHZE?showinfo=0 YouTube上查starlink train,有很多人拍的视频。现在只是几百颗在天上飞,将来有4万多颗,对我们地球的影响是非常大的。光污染,collision,废弃星链的回收,等等,我们以后的人类再也看不到以前的星空。Musk反正一直想坐火星人,可是地球才是我们的家啊,我们只有一颗地球。
星链的高度是550公里,空间站是400公里
都是假的!
一张桌子大小的东西,距离你400公里远,你觉得呢?
https://www.reddit.com/r/Starlink/comments/gayibm/4_of_the_top_8_results_for_starlink_on_youtube/
n倍?
傻子是你吧
They move across the night sky at perceptible speeds comparable to a commercial airliner traveling at cruising altitude
如果折换成商业飞机巡航高度,速度类似洲际民航巡航速度 民航飞机高度10公里左右,中国空间站在近地轨道附近400公里,星链400-500公里 而且这些卫星在折返
有激光干扰的能力 话说美国真的是强盗主义
难得见到的明白帖子。点个赞。 抛开政治不谈,星链绝对不负责任,国际上对此缺乏相应的规定也是原因之一。
美,中,俄都有这个技术。互杀可以
星链卫星单颗重量386公斤。有几个星链成员,离欧洲空间局的卫星轨道太近了,迫使欧空局进行了一个回避操作。SpaceX呢,将此事件归咎于其呼叫寻呼系统中的“错误”。
2019年发射60颗,一个月后,与其中的三颗失去了联系。 这三颗卫星将继续绕地球飞行一段时间,最终会在重力的作用下坠向地球。
剩余的57颗卫星,其中的45颗卫星已经通过机载推进器提高了他们的高度,最终到达了大约342英里(约合550公里)的预定轨道。有5颗卫星依旧在提高它们的轨道高度,另外5颗在进行提高轨道高度前的额外系统检查。
现在已经全都是太空垃圾了,看看NASA的模拟图,密密麻麻的特别瘆人
貌似各国对乱来的行为睁一只眼闭一只眼,谁也不想倒过来把自己也约束了,毕竟发展不均,万一哪天技术达到了自己也想干点儿类似星链的事儿就干不了了
就是发射很多卫星,欧洲,俄国,中国技术都能做到 就像tesla,电池技术没有突破,就用几千节普通电池铺放在车底。
但是俄国中国肯定不愿意整个国家通讯被美国控制, 欧洲也不会乐意, 大家每家都发5万颗卫星, 天空近地轨道增加20万颗小星星,而且是移动的,20万条轨道
一閃一閃亮晶晶 滿天都是小星星 掛在天上放光明 好像許多小眼睛 一閃一閃亮晶晶 滿天都是小星星
跟交通一样,出事是迟早的事情 星链卫星越多,出事的几率越大,但群体对它的依赖也越大。如果立法不够早的话,后面的利益相关关系,最终会使这些演变成另一场资本加权势再加愚民的狗血。 Space本身就是资源。占据空间就是掠夺资源。说不定以后演变成付费求它减少污染都可能
Space law 目前就是各类treaty和international law在维持着吧 美国动不动就退出这个那个的谁管的了它
我不讨厌他。他的公司和他个人一样,高能但多动。 可以带来很多惊喜,但也可以有很大的破坏性。需要的是,有前瞻性性的立法来约束
何止做得到,你国技术超越spacex10条街。
爱死他了,人类本来就在作死的路上一去不回头,他给人类带来了希望,只是不在地球
激光技术我不太了解。 不过小粉红的250型AI自行嘴炮,你了解一下。
你怕是没看懂,我在反讽
要不说西方就是双标党呢。。
而且和普通卫星不同,马斯克的卫星为了追求极致的廉价,走的是靠数量补质量的路线,原本就预计会有大量的卫星出各种问题。。。
你家天文学家靠眼睛观测星空?你当哈勃韦伯这些天文望远镜是吃闲饭的?算了,以你的文化水平也不可能理解什么是哈勃什么是韦伯
肉眼能见星星亮度分为6等,等级越高越暗。 如果更亮,比如空间轨道站就非常亮达到 -2.6 等,太阳 -26 近地轨道卫星一般能达到+2 - +3等
空间站100米,马斯克卫星展开太阳能电池板10米。 0和6等亮度差了100倍,空间站-2.6等
一颗卫星
延时拍摄空间站
普通人就不能看看星空了?以后都去天文馆观星?人类污染地球还不够,星空也不放过。
那就是说你也认为中俄打掉卫星,把那么多垃圾扔太空的行为很糟糕了。赞你一个! 不同的地方是,前者是政府行为,星链是私企行为。美国公开讨论星链的负面在科技界和大众媒体一直都在的。你没关心这个吧。 谈及双标,现在什么都只是口头批评而已。中俄打了卫星,西方也没什么实质性的行为
城市灯光妨碍观看星空,高楼大厦妨碍观看星空,飞机晚上飞来飞去妨碍观看星空。照你说法,普通人观看星空这么重要,那退回石器时代当个穴居人好了。
智商!现在各国大量地面光学射电望远镜,有太空望远镜不可替代优势。有航空器飞来飞去,地面上无论光学望远镜还是射电望远镜都受影响,我5岁侄女都知道 航空器会对观测图像造成污染,影响局部星场。星链在某个时间对某一块天区产生污染,降低了天文学家观测时这块天区的可用性。需要通过计算丢弃这部分图像。
听你这意思,地面上是没有天文站了?
智商真是硬伤!
普通人休假,经常去国家公园camping观看星空 但是星链飞来飞去不但影响普通人,也影响天文台观察,而且对空间站造成危险。
https://en.wikipedia.org/wiki/Anti-satellite_weapon#United_States
来,美国这方面的测试了解一下。。。 老美可不光是打卫星,还直接在太空中搞核爆,呵呵。。。。
Starfish Prime was a high-altitude nuclear test conducted by the United States, and was the largest nuclear test conducted in outer space, and one of five conducted by the US in space.
星链你看看美国政府给多少funding… NASA很多都outsource的啊
这方面谈啥政府行为和私企行为不同的,要么是真不懂,要么是装傻。。。。
这个是说王力宏?串帖子了吧
空间望远镜在高强度的辐射环境下,计算机是会产生奇怪的错误信号的。
对于可见光来说,空间望远镜虽然有优势,极其昂贵 对于射电波段来说,只有地面射电观测。
地面望远镜是不可取代广泛使用。
把原文肆意篡改,扎个稻草人。
马斯克的卫星面积两平方米,十万颗卫星才0.2平方公里。地球面积是5亿平方公里。也就是说他的卫星遮挡了25亿分之一的天空。这比镜头上的一粒灰尘的影响还要小几百万倍。怎么就不能看星空了?
上世纪六十年代吧?苏联美国搞竞赛,双方都干过 人类就是这么蛮横过来的,希望理性反思 而不是蛮指对方双标什么的
部署在9个不同高度,范围在340公里到614公里之间,都是危险地带
今天听王剑的评论,他说天宫的高度应该高于星链10几公里才对。卫星没有多少动力,而且上千颗联网,不大可能自己飘高,可能是天宫在慢慢降低,现在已经明显低于设计轨道。
首先太阳坂打开达到10米 其次在太空中运动,是一条轨迹,都是用 train形容的
没有任何技术难度,欧洲,俄国,中国哪家都可以做到 只是没有资本市场那么贪婪而不负责任。
轨道不是固定不变的,有一个大致范围,一般不会下降得太多。降到一定范围,用booster顶上去,基本操作了,尤其太阳活动年。十几公里的变化不是个事儿
问题你们就是做不到咯,包括人人可做的电动车,还是被特斯拉狂扁,吼吼。别说什么负责啦这种鬼话,负责就不会造电池负责就不会做太阳能板,死要钱不顾后果的典型还有脸说别人,酸掉大牙
真是莫名其妙的逻辑。。
看星空,看的是天上的星星。。 所以要比较的并不是卫星的遮挡面积,而是这些卫星反光/亮度和普通星星亮度的对比。。。
这都想不明白?
那你先去质问一下是谁用病毒污染了整个世界好么?
现代科技在西方人尤其是以油太为主的西方跨国私人资本手里,给人类带来了无穷无尽的灾难
Sore loser,华为坑蒙拐骗举全国之力被人家一家私人公司轻而易举干掉,现在就开始叫唤环保了,你也就跟你五岁侄女一样的智商,你们这种思想境界,真是最适合被选入宫给贝勒们当侍妾来着,祝你家能养出这样的女孩子
哈哈哈哈哈,我为什么要和你一个五毛比智商?你也配!
从来都是这样,自己的错打死不承认,一定要赖在别人身上,教育出来的粉毛也是这个德行,男盗女娼的
你说的油太是犹太吗?纳粹附体之言
星链卫星高度是550km,
星链部署在9个不同高度,范围在340公里到614公里之间
星链部署在9个不同高度
10几公里 已经 距离很近了。
懂了能把发射成本降低靠的不是技术,别的国家或者还有贝索斯都有技术但是不想降低发射成本,有钱就是可以这么任性,不像SpaceX这么穷酸
星链是动的,等它飞走好了,天文爱好者拍星空,通常要好几个小时,不回几分钟都等不了吧。
星链确实可能影响光学望远镜,但是可以通过后期制作去掉,毕竟星链是移动的,星体是静止的。而且SpaceX正在想办法降低卫星的发射光。
事实是,星链具有巨大的军事和民用价值,远远超过了他的缺点。转一个知乎的分析:https://www.zhihu.com/question/390880062。
Source?
现在我看到的文献都是550km,马斯克确实有计划,将来几万卫星会分不在三个不同高度340km,550km和1150。
但是现在批的只有540-570km
你别光开口,拿文件来看看
The license modification allows SpaceX to change the altitude for 2,814 future Starlink satellites, from the 1,100-1,300 km range to the 540-570 km range. It also modifies the final size of the Starlink constellation by one satellite from 4,409 to 4,408. SpaceX just under 1,400 satellites in orbit at this point.
那个你知道美国人吃的太多 消化后的残渣导致的温室气体世界第一吗……
这不是才刚刚开始吗?你觉得就此打住了?
没有哦。我们高华都觉得应龙是美国为什么伟大的原因,激动。等到他下次要去中国加大投资赞美中国发展的时候,我们才讨厌他,觉得他墙头草迟早被铁拳呵呵。