夜空是共享的荒野。 在漆黑的夜晚,远离城市的灯光,您可以像几个世纪前的祖先一样看到星星。 您可以看到银河系和与神话猎人、姐妹和旅程的故事相关的星座。
但就像任何荒野一样,夜空也会被污染。 自 1957 年人造卫星 1 号以来, 数千颗卫星 太空垃圾碎片已被送入轨道。
目前,穿越夜空的卫星在很大程度上是一种好奇心。 但随着卫星星座的出现——包含成百上千颗卫星——这可能会改变。
最近推出的 蓝行者3,卫星星座的原型,提出了明亮卫星污染我们夜空的前景。 64平方米, 最大的商业通信卫星 在低地球轨道上——而且非常明亮。
夜空的污染
虽然在夜空中发现卫星一直是一件令人好奇的事情,但在轨卫星数量的增加意味着夜空污染可能成为一个严重的问题。
在晴朗的夜晚,尤其是在黄昏时分,您可以看到卫星在夜空中穿行。 这些卫星位于近地轨道,距离地球仅几百公里,每秒运行近 8 公里。
应用 和 网站 允许您识别或预测头顶特定卫星的到达。 看到 国际空间站 路过,意识到在那光点上有一群宇航员。
但在过去几年里,卫星发射的步伐加快了。 SpaceX 让卫星发射变得更便宜,它已经发射了数千颗提供互联网服务的 Starlink 卫星。
来自 Blanco 4 米望远镜的图像,其中包含 Starlink 卫星的 19 条轨迹。 图片来源:CTIO/NOIRLab/NSF/AURA/DECam DELVE 调查
每枚猎鹰 9 号火箭将大约 50 颗 Starlink 卫星送入轨道,最初会产生一列明亮的卫星。 这些最初生产的 不明飞行物报告但现在已经足够普遍以至于没有特别的新闻价值。
一旦 Starlink 卫星分散并移动到它们的运行轨道,它们就接近肉眼可见的极限。
然而,这些卫星的亮度足以在用望远镜拍摄的图像中产生轨迹。 这些轨迹覆盖了它们下方的恒星和星系,只能通过拍摄更多图像来补救。 短暂的瞬态现象,例如从一个短暂的闪光 伽马射线暴可能会丢失。
蓝行者3
虽然 Starlink 是最大的现役卫星星座,有数千颗卫星在轨运行,但其他卫星也在计划中。
亚马逊的 Blue Origin 计划推出 3,200 多个 柯伊伯计划 卫星,和 AST太空移动 计划推出 100 蓝鸟 卫星(也许更多)。
最近发射的 BlueBird 原型 BlueWalker 3 在天文学家中引起了真正的警觉。
虽然 BlueWalker 3 最初非常微弱,但它展开了一个 64 平方米的通信阵列——大约有一个壁球场那么大。 这个广阔的表面非常善于反射阳光,而 BlueWalker 3 现在就像夜空中一些最亮的星星一样明亮。
运行中的蓝鸟卫星是可能的 可能更大 和更亮。
![BlueWalker 3 于 2022 年 11 月 16 日经过 Oukaimeden 天文台。在最亮的时候,BlueWalker 3 比夜空中除了几颗星星之外的所有星星都亮。 学分:<一类="资源" href="https://bynss.com/go/?url=https://www.iau.org/public/images/detail/iau2211c/" >CLEOsat/Oukaimeden 天文台/IAU CPS/AE Kaeouach</a>‘> BlueWalker 3 于 2022 年 11 月 16 日经过 Oukaimeden 天文台。在最亮的时候,BlueWalker 3 比夜空中除了几颗星星之外的所有星星都亮。 信用: <a class="source" href="https://bynss.com/go/?url=https://www.iau.org/public/images/detail/iau2211c/" rel="nofollow noopener" target="_blank">CLEOsat/Oukaimeden 天文台/IAU CPS/AE Kaeouach</a><br /></figure><p>大量如此明亮的卫星可能很糟糕——非常糟糕。 如果有成千上万颗如此明亮的卫星,有时您将无法看到夜空而不看到明亮的卫星。</p><p>我们会失去那种荒野感,几乎不断地提醒我们天空中的技术。</p><div class="quads-location quads-ad894915 " id="quads-ad894915" style="float:none;text-align:center;padding:0px 0 0px 0;"> <ins class="adsbygoogle" style="display:inline-block;width:336px;height:280px;" data-ad-client="ca-pub-9263444308967852" data-ad-slot="3819923726"></ins> <script>(adsbygoogle = window.adsbygoogle || []).push({});</script> </div><p>这可能会对专业天文学产生重大影响。 与昏暗的卫星相比,较亮的卫星对天文图像造成的损害更大。</p><p>此外,许多这些卫星以可能干扰射电天文学的无线电频率广播,传输 <a href="https://bynss.com/go/?url=https://www.iau.org/news/announcements/detail/ann19035/" rel="nofollow noopener" target="_blank">无线电波</a> 在远程站点上方 <a href="https://bynss.com/go/?url=https://www.industry.gov.au/science-technology-and-innovation/space-and-astronomy/co-hosting-ska-telescope/australian-radio-quiet-zone-wa" rel="nofollow noopener" target="_blank">射电天文台观察天空</a>.</p><p> <b>悬崖?</b></p><p>接下来会发生什么是不确定的。 <a href="https://bynss.com/go/?url=https://www.iau.org/public/themes/satellite-constellations/" rel="nofollow noopener" target="_blank">国际天文学联合会</a> 已经传达了关于卫星星座的警报,并且 <a href="https://bynss.com/go/?url=https://www.iau.org/news/pressreleases/detail/iau2211/" rel="nofollow noopener" target="_blank">蓝行者3</a> 尤其是。</p><div class="quads-location quads-ad894915 " id="quads-ad894915" style="float:none;text-align:center;padding:0px 0 0px 0;"> <ins class="adsbygoogle" style="display:inline-block;width:336px;height:280px;" data-ad-client="ca-pub-9263444308967852" data-ad-slot="3819923726"></ins> <script>(adsbygoogle = window.adsbygoogle || []).push({});</script> </div><p>然而,卫星星座的批准 <a href="https://bynss.com/go/?url=https://www.fcc.gov/document/fcc-moves-facilitate-satellite-broadband-competition" rel="nofollow noopener" target="_blank">美国联邦通信委员会</a> 对环境影响的考虑相对较少。</p><p>最近,这已被标记为一个主要问题 <a href="https://bynss.com/go/?url=https://www.gao.gov/products/gao-23-105005" rel="nofollow noopener" target="_blank">美国政府责任 Office</a>,但这是否会导致具体变化尚不清楚。</p><p>我们可能正处于悬崖边上。 为了互联网或 5G,夜空中是否会布满明亮的人造卫星? 还是我们会退后一步,将夜空保留为全球共享的荒野?</p><p><script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script></p><div class="quads-location quads-ad894915 " id="quads-ad894915" style="float:none;text-align:center;padding:0px 0 0px 0;"> <ins class="adsbygoogle" style="display:inline-block;width:336px;height:280px;" data-ad-client="ca-pub-9263444308967852" data-ad-slot="3819923726"></ins> <script>(adsbygoogle = window.adsbygoogle || []).push({});</script> </div></div><div class="ct-share-box ct-hidden-sm" data-location="bottom" data-type="type-1" ><div data-icons-type="simple"> <a href="https://www.facebook.com/sharer/sharer.php?u=http%3A%2F%2Fbynss.com%2Fspace%2F1028785.html" data-network="facebook" aria-label="Facebook" rel="noopener noreferrer nofollow" > <span class="ct-icon-container" > <svg
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