{"version":"https://jsonfeed.org/version/1","title":"Micro.blog - Daniel Fischer","home_page_url":"https://micro.blog","feed_url":"https://micro.blog/posts/cosmos4u@scicomm.xyz","_microblog":{"about":"https://micro.blog/about/api","id":"163684","username":"cosmos4u@scicomm.xyz","bio":"Science writer in Germany since, gasp, 1982 specializing in all things space. Blogging all the time - in German - on https://skyweek.wordpress.com Supports tootfinder","pronouns":"","is_following":false,"is_you":false,"following_count":1,"discover_count":0},"author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://micro.blog/photos/200/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg"},"items":[{"id":"100125714","content_html":"<p><span class=\"h-card\"><a href=\"https://micro.blog/manton\" class=\"u-url mention\">@<span>manton</span></a></span> Prepare mentally for one of the best cliffhangers in TV history at the end of final episode - the drama simply blew me away.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/117527436131846694","date_published":"2026-10-30T02:12:36+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"02:12","date_timestamp":1793326356,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"97298976","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@sundogplanets\" class=\"u-url mention\">@<span>sundogplanets</span></a></span> At the annual meeting of the <span class=\"h-card\"><a href=\"https://wisskomm.social/@GermanAstroSoc\" class=\"u-url mention\">@<span>GermanAstroSoc</span></a></span> this week the dire situation esp. for radio astronomy was stressed in no uncertain terms. There will be some coordinated political action but details are pending</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/117246068760105877","date_published":"2026-09-10T09:37:11+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2026-09-10 09:37","date_timestamp":1789033031,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"94704820","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@ec_euclid\" class=\"u-url mention\">@<span>ec_euclid</span></a></span> In how far is NASA's official All Clear message <a href=\"https://x.com/NASASpox/status/2081114506843881941\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">x.com/NASASpox/status/20811145</span><span class=\"invisible\">06843881941</span></a> from yesterday evening (CEDT) merely a \"rumour\"?</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/116988129581083326","date_published":"2026-07-26T20:19:52+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2026-07-26 20:19","date_timestamp":1785097192,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"93337145","content_html":"<p>Reducing the impact of <a href=\"https://scicomm.xyz/tags/satellite\" class=\"mention hashtag\">#<span>satellite</span></a> brightness for astronomy - laboratory characterization and simulations: <a href=\"https://academic.oup.com/mnras/article/550/1/stag1136/8722194\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">academic.oup.com/mnras/article</span><span class=\"invisible\">/550/1/stag1136/8722194</span></a> (\"a passive, material-based mitigation strategy based on an ultra-black, aerospace-qualified coating\") -&gt; Scourge of satellites could be mitigated with help of ultra-black coating: <a href=\"https://ras.ac.uk/news-and-press/research-highlights/scourge-satellites-could-be-mitigated-help-ultra-black-coating\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">ras.ac.uk/news-and-press/resea</span><span class=\"invisible\">rch-highlights/scourge-satellites-could-be-mitigated-help-ultra-black-coating</span></a></p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/116851130387969779","date_published":"2026-07-02T15:39:10+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2026-07-02 15:39","date_timestamp":1783006750,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"93337144","content_html":"<p>The video <a href=\"https://www.youtube.com/watch?v=LJNwAKSL17s\"><span class=\"invisible\">https://www.</span><span class=\"\">youtube.com/watch?v=LJNwAKSL17s</span><span class=\"invisible\"></span></a> about the increasing satellite <a href=\"https://scicomm.xyz/tags/Megaconstellation\" class=\"mention hashtag\">#<span>Megaconstellation</span></a> threat to astronomy (and more) is linked in the sidebar of the ESO release but deserves a separate shout-out. Also learned that the actual paper has just been formally published in <a href=\"https://www.aanda.org/articles/aa/pdf/forth/aa60006-26.pdf\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">aanda.org/articles/aa/pdf/fort</span><span class=\"invisible\">h/aa60006-26.pdf</span></a> - and see <a href=\"https://gizmodo.com/eso-study-finds-that-no-more-than-100000-satellites-should-orbit-earth-2000780091\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">gizmodo.com/eso-study-finds-th</span><span class=\"invisible\">at-no-more-than-100000-satellites-should-orbit-earth-2000780091</span></a> for an article.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/116847515830724611","date_published":"2026-07-02T00:19:56+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2026-07-02 00:19","date_timestamp":1782951596,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"93337143","content_html":"<p>Large or bright <a href=\"https://scicomm.xyz/tags/SatelliteConstellations\" class=\"mention hashtag\">#<span>SatelliteConstellations</span></a> - effects on observations, including on the background sky brightness: <a href=\"https://arxiv.org/abs/2604.09427\"><span class=\"invisible\">https://</span><span>arxiv.org/abs/2604.09427</span><span class=\"invisible\"></span></a> -&gt; \"Beyond the limit\" - one million satellites and mirrors in space pose grave threat to the night sky: <a href=\"https://www.eso.org/public/news/eso2607/\"><span class=\"invisible\">https://www.</span><span>eso.org/public/news/eso2607/</span><span class=\"invisible\"></span></a> -&gt; thread <a href=\"https://bsky.app/profile/eso.org/post/3mplijgvngi2k\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">bsky.app/profile/eso.org/post/</span><span class=\"invisible\">3mplijgvngi2k</span></a></p>","summary":"","url":"https://scicomm.xyz/users/cosmos4u/statuses/116846048140168782","date_published":"2026-07-01T18:06:41+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2026-07-01 18:06","date_timestamp":1782929201,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"is_conversation":true,"is_linkpost":false,"is_mention":false,"is_podcast":false,"note":"","syndication":[]}},{"id":"80709350","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@sundogplanets\" class=\"u-url mention\">@<span>sundogplanets</span></a></span> A German light pollution activist observed one of the smaller BlueBirds at +2 mag.: <a href=\"https://www.facebook.com/andreas.hanel.56/posts/pfbid0ddA9TEEywyjVCYZZvJ98Qmddg5cYpYQo9WEaQF2Gfg7VG5BYdrkB5CG1f6pzveU7l\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">facebook.com/andreas.hanel.56/</span><span class=\"invisible\">posts/pfbid0ddA9TEEywyjVCYZZvJ98Qmddg5cYpYQo9WEaQF2Gfg7VG5BYdrkB5CG1f6pzveU7l</span></a> - that's near the bright end of the statistics in <a href=\"https://academic.oup.com/mnrasl/article/544/1/L15/8251664\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">academic.oup.com/mnrasl/articl</span><span class=\"invisible\">e/544/1/L15/8251664</span></a> ... Soon we'll find out what the NSF deal <a href=\"https://www.nsf.gov/mps/updates/nsf-ast-spacemobile-establish-satellite-coordination\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">nsf.gov/mps/updates/nsf-ast-sp</span><span class=\"invisible\">acemobile-establish-satellite-coordination</span></a> and AST's promises in <a href=\"https://ast-science.com/connecting-the-world-while-protecting-the-skies/\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">ast-science.com/connecting-the</span><span class=\"invisible\">-world-while-protecting-the-skies/</span></a> are worth ...</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/115775698800223436","date_published":"2025-12-24T17:22:46+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2025-12-24 17:22","date_timestamp":1766596966,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"71664576","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@sundogplanets\" class=\"u-url mention\">@<span>sundogplanets</span></a></span> There have been several seemingly informed hit pieces against the company (more of a tiny start-up I think) on YouTube recently but actually looking into what Reflect Orbital is planning in detail - which involves listening to hours of *their* videos as there is little hard stuff in writing - it turns out that the critics all made math errors by many orders of magnitude ... If you write about them do your homework first and don't rely on other critics - and if you think you've found obvious showstoppers discuss it with them. (Disclaimer: the concept is crazy but it doesn't contradict physics ... and something like Starlink also sounded crazy but in that case someone simply had the $$ and did it and here we are.)</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/115060599593024714","date_published":"2025-08-20T10:23:38+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2025-08-20 10:23","date_timestamp":1755685418,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"56936279","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@vicgrinberg\" class=\"u-url mention\">@<span>vicgrinberg</span></a></span> <span class=\"h-card\"><a href=\"https://reporter.social/@pikarl\" class=\"u-url mention\">@<span>pikarl</span></a></span> <span class=\"h-card\"><a href=\"https://scholar.social/@SylviaFysica\" class=\"u-url mention\">@<span>SylviaFysica</span></a></span> The current odds are 1:77 in <a href=\"https://cneos.jpl.nasa.gov/sentry/details.html#?des=2024%20YR4\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">cneos.jpl.nasa.gov/sentry/deta</span><span class=\"invisible\">ils.html#?des=2024%20YR4</span></a> and 1:76 in <a href=\"https://neo.ssa.esa.int/search-for-asteroids?tab=possimp&amp;des=2024YR4\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">neo.ssa.esa.int/search-for-ast</span><span class=\"invisible\">eroids?tab=possimp&amp;des=2024YR4</span></a> - last night they were 1:85 to 1:83. Typical behavior when the target ellipse in the plane orthogonal to the asteroid's orbit shrinks with more astrometrs, with the Earth near its center.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/113913703982695194","date_published":"2025-01-29T21:13:00+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2025-01-29 21:13","date_timestamp":1738185180,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"90854601","content_html":"<p><span class=\"h-card\"><a href=\"https://fediscience.org/@ChrisWalter\" class=\"u-url mention\">@<span>ChrisWalter</span></a></span> <span class=\"h-card\"><a href=\"https://astrodon.social/@VRubinObs\" class=\"u-url mention\">@<span>VRubinObs</span></a></span> Thank you very much! From the press release I understood that actutal photons from the sky have made it through the now complete optical system and into the ComCam ... yet <a href=\"https://rubin.canto.com/v/RubinPressKits/album/RNVI9?viewIndex=2&amp;display=curatedView\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">rubin.canto.com/v/RubinPressKi</span><span class=\"invisible\">ts/album/RNVI9?viewIndex=2&amp;display=curatedView</span></a> doesn't contain a single sky image taken with it. Meaning ...?</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/113410974134154294","date_published":"2024-11-02T02:22:11+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2024-11-02 02:22","date_timestamp":1730514131,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"90854600","content_html":"<p><span class=\"h-card\"><a href=\"https://fediscience.org/@ChrisWalter\" class=\"u-url mention\">@<span>ChrisWalter</span></a></span> <span class=\"h-card\"><a href=\"https://astrodon.social/@VRubinObs\" class=\"u-url mention\">@<span>VRubinObs</span></a></span> How much of the focal plane does the test camera cover, compared to the LSSTCam? And why do this intermediate step in the first place with the big camera already at the observatory?</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/113410250004242900","date_published":"2024-11-01T23:18:02+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2024-11-01 23:18","date_timestamp":1730503082,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"35284437","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.online/@mastodonmigration\" class=\"u-url mention\">@<span>mastodonmigration</span></a></span> Four new images, data and images downloaded today, press conference tomorrow.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/112005282055155442","date_published":"2024-02-27T20:16:12+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2024-02-27 20:16","date_timestamp":1709064972,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"32387864","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.laurenweinstein.org/@lauren\" class=\"u-url mention\">@<span>lauren</span></a></span> <span class=\"h-card\"><a href=\"https://mastodon.online/@mastodonmigration\" class=\"u-url mention\">@<span>mastodonmigration</span></a></span> Or they collect all what they have and present it in a big show at the end ... Schrödinger's moon lander, and the box remains closed.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/111995887325586190","date_published":"2024-02-26T04:27:00+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2024-02-26 04:27","date_timestamp":1708921620,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"26843107","content_html":"<p><span class=\"h-card\"><a href=\"https://scicomm.xyz/@mustapipa\" class=\"u-url mention\">@<span>mustapipa</span></a></span> Such a taxonomy might be popular on \"planet Gonggong\" but is absurdly unastronomical and unphysical from a solar *system* perspective ... and just think about the 'geological complexity' of Jupiter for a moment. ;-) What we have since 2006 is fine, thank you.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/111461874405034796","date_published":"2023-11-23T21:00:30+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-11-23 21:00","date_timestamp":1700773230,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"26050640","content_html":"<p><span class=\"h-card\"><a href=\"https://scicomm.xyz/@mustapipa\" class=\"u-url mention\">@<span>mustapipa</span></a></span> It's the beam splitter's fault: <a href=\"https://twitter.com/akira_doe/status/1721886699863834770\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">twitter.com/akira_doe/status/1</span><span class=\"invisible\">721886699863834770</span></a>. And will be dealt with eventually: <a href=\"https://scicomm.xyz/@knud@mastodon.social/111370130015640177\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">scicomm.xyz/@knud@mastodon.soc</span><span class=\"invisible\">ial/111370130015640177</span></a></p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/111370353302919557","date_published":"2023-11-07T17:05:28+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-11-07 17:05","date_timestamp":1699376728,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"26047939","content_html":"<p><span class=\"h-card\"><a href=\"https://scicomm.xyz/@mustapipa\" class=\"u-url mention\">@<span>mustapipa</span></a></span> I'm puzzled by two technical details, evident especially in the Perseus Cluster image: what exactly is causing these widespread. very distinct and bright blue ghosts (that one ESA caption calls 'normal' but doesn't elaborate) - and what explains the strikingly different color patterns in the diffraction spikes of blue, whitish and redder stars? Finally, do we already have rough reality-vs.-specs numbers for Euclid's angular resolution and the sensitivity of the two instruments?</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/111370087555450488","date_published":"2023-11-07T15:57:53+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-11-07 15:57","date_timestamp":1699372673,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"21179296","content_html":"<p><span class=\"h-card\"><a href=\"https://scicomm.xyz/@dantheclamman\" class=\"u-url mention\">@<span>dantheclamman</span></a></span> The rate of close encounters between satellites in LEO is skyrocketing - no pun intended ... well, maybe it is - already.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110754579980398977","date_published":"2023-07-21T23:06:13+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-07-21 23:06","date_timestamp":1689980773,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"19905494","content_html":"<p><span class=\"h-card\"><a href=\"https://journa.host/@w7voa\" class=\"u-url mention\">@<span>w7voa</span></a></span> Can. We. Just. Stop. Reporting. Every absurdity this ... person utters??? I had hoped that at least Mastodon would be free from this insanity but some \"journalists\" just don't get it. :-(</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110539992668685827","date_published":"2023-06-14T01:33:51+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-06-14 01:33","date_timestamp":1686706431,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"19818971","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@derpostillon\" class=\"u-url mention\">@<span>derpostillon</span></a></span> Dieser Nicht-Witz wird auch durch endlose Wiederholung nicht witziger. (Falls es immer noch nicht alles kapiert haben: Meteoriten fallen mit ballistischer Geschwindigkeit zu Boden, da durch die Luft schon lange abgebremst, und schlagen keine \"Krater\". Allenfalls Löcher in Dachziegel. Die meisten liegen einfach so im Gras rum.)</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110521343665811610","date_published":"2023-06-10T18:31:09+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-06-10 18:31","date_timestamp":1686421869,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"19268602","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@burritojustice\" class=\"u-url mention\">@<span>burritojustice</span></a></span> When they knew what is not so clear: They narrated a nominal - as we soon found out: fantasy - descent in the webcast and really seemed to believe in the (wrong) telemetry they saw displayed. The confusion at the nominal landing time seemed genuine. Still waiting for a detailled and honest post-mortem from the company: that would help everyone to do better next time.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110402708413179888","date_published":"2023-05-20T19:40:39+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-05-20 19:40","date_timestamp":1684611639,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"19243104","content_html":"<p><span class=\"h-card\"><a href=\"https://mastodon.social/@sundogplanets\" class=\"u-url mention\">@<span>sundogplanets</span></a></span> With well over 4000 Starlink satellites (plus more than enough others) in orbit right now, who actually needs simulations? Just put observers at different places at different times under different levels of light pollution (!!!) and have them count all the artsats they see over an hour. And/or do the same with a calibrated sensitive camera and a wide-angle or fisheye lens. Such data I'd really like to see (and then guide the debate about remedies).</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110396766572725478","date_published":"2023-05-19T18:29:34+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-05-19 18:29","date_timestamp":1684520974,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"18648541","content_html":"<p><span class=\"h-card\"><a href=\"https://federate.social/@mattblaze\" class=\"u-url mention\">@<span>mattblaze</span></a></span> <span class=\"h-card\"><a href=\"https://ioc.exchange/@jlundell\" class=\"u-url mention\">@<span>jlundell</span></a></span> <span class=\"h-card\"><a href=\"https://mstdn.social/@plragde\" class=\"u-url mention\">@<span>plragde</span></a></span> Having spent countless hours in the darkroom - oh, those fumes ... :-) <br> - making b&amp;w prints I second that ...</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110261106583527508","date_published":"2023-04-25T19:29:27+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-04-25 19:29","date_timestamp":1682450967,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"18629576","content_html":"<p><span class=\"h-card\"><a href=\"https://federate.social/@mattblaze\" class=\"u-url mention\">@<span>mattblaze</span></a></span> He's on Twitter ... kind of: <a href=\"https://twitter.com/AnselAdamsTrust\"><span class=\"invisible\">https://</span><span class=\"\">twitter.com/AnselAdamsTrust</span><span class=\"invisible\"></span></a> - even the thumbnails there are breathtaking.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110256818537862081","date_published":"2023-04-25T01:18:56+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-04-25 01:18","date_timestamp":1682385536,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"18629110","content_html":"<p><span class=\"h-card\"><a href=\"https://federate.social/@mattblaze\" class=\"u-url mention\">@<span>mattblaze</span></a></span> Sadly I have to agree with her: most b&amp;w photography one sees on social media *is* dull and often outright bad. Serious b&amp;w imaging requires a careful choice of color filters already while shooting and thinking hard about lighting, contrast gradients and so on, not simply taking a color image and later setting the saturation to zero. Ask Ansel Adams for advice here ...</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110256716378159131","date_published":"2023-04-25T00:52:57+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-04-25 00:52","date_timestamp":1682383977,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"18593731","content_html":"<p><span class=\"h-card\"><a href=\"https://sauropods.win/@futurebird\" class=\"u-url mention\">@<span>futurebird</span></a></span> <span class=\"h-card\"><a href=\"https://mastodon.social/@artscistudios\" class=\"u-url mention\">@<span>artscistudios</span></a></span> Only have the numbers for mammals handy, in a new paper: <a href=\"https://www.pnas.org/doi/10.1073/pnas.2204892120?cookieSet=1\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">pnas.org/doi/10.1073/pnas.2204</span><span class=\"invisible\">892120?cookieSet=1</span></a> - the authors aren't interested in any other animal class, let alone phylum, it seems.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110248734244164163","date_published":"2023-04-23T15:03:00+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-04-23 15:03","date_timestamp":1682262180,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"18461072","content_html":"<p><span class=\"h-card\"><a href=\"https://geeknews.chat/@arstechnica\" class=\"u-url mention\">@<span>arstechnica</span></a></span> Hello? There is no \"rocket poised just behind it\", the Ariane is still in the assembly building, not even rolled out to the launch pad yet - so the sloth has all reason to look \"calmly\" in this old footage shown during the launch webcast.</p>","url":"https://scicomm.xyz/users/cosmos4u/statuses/110217221147254350","date_published":"2023-04-18T01:28:48+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2023-04-18 01:28","date_timestamp":1681781328,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"edit_url":null,"is_conversation":true,"is_linkpost":false,"is_mention":true}},{"id":"13742125","content_html":"<p>Spectral analysis of ultra-cool white dwarfs polluted by planetary debris: <a href=\"https://arxiv.org/abs/2206.05258\"><span class=\"invisible\">https://</span><span>arxiv.org/abs/2206.05258</span><span class=\"invisible\"></span></a> -&gt; <a href=\"https://interestingengineering.com/science/10-billion-year-old-debris-earth-like-properties\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">interestingengineering.com/sci</span><span class=\"invisible\">ence/10-billion-year-old-debris-earth-like-properties</span></a></p>","summary":"","url":"https://scicomm.xyz/@cosmos4u/109298620695493777","date_published":"2022-11-06T19:56:38+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2022-11-06 19:56","date_timestamp":1667764598,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"is_conversation":false,"is_linkpost":false,"is_mention":false,"is_podcast":false,"note":"","syndication":[]}},{"id":"13742123","content_html":"Browsing the #Mastodon astronomers 'phonebook' https://fedi.directory/tag/astronomy/ (and realizing that I was following half of them already, found through hashtags or on specific instances last night) I'm now looking for similar lists of astronomy and space science *organizations* ...... <a href=\"https://scicomm.xyz/@cosmos4u/109297916820524628\">scicomm.xyz</a>","summary":"","url":"https://scicomm.xyz/@cosmos4u/109297916820524628","date_published":"2022-11-06T16:57:37+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2022-11-06 16:57","date_timestamp":1667753857,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"is_conversation":false,"is_linkpost":false,"is_mention":false,"is_podcast":false,"note":"","syndication":[]}},{"id":"13742122","content_html":"Looking forward to the Swedish #MATS - Mesospheric Airglow/Aerosol Tomography and Spectroscopy; https://www.rymdstyrelsen.se/en/swedish-space-industry/swedish-satellites/mats/ and https://www.ohb-sweden.se/news-and-media/satellite-mats-successfully-launched-and-is-in-good-health and htt... <a href=\"https://scicomm.xyz/@cosmos4u/109294664485946922\">scicomm.xyz</a>","summary":"","url":"https://scicomm.xyz/@cosmos4u/109294664485946922","date_published":"2022-11-06T03:10:31+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2022-11-06 03:10","date_timestamp":1667704231,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"is_conversation":false,"is_linkpost":false,"is_mention":false,"is_podcast":false,"note":"","syndication":[]}},{"id":"13742120","content_html":"Lots of space &amp; astronomy stuff happening in the past days or in need to catch up:https://skyweek.wordpress.com/2022/11/01/die-saulen-von-webb-nun-von-7-7-bis-15-%c2%b5m/https://skyweek.wordpress.com/2022/11/02/das-war-der-vierte-einsatz-einer-falcon-heavy/https://skyweek.wordpress.com/... <a href=\"https://scicomm.xyz/@cosmos4u/109294120364608824\">scicomm.xyz</a>","summary":"","url":"https://scicomm.xyz/@cosmos4u/109294120364608824","date_published":"2022-11-06T00:52:08+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2022-11-06 00:52","date_timestamp":1667695928,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"is_conversation":false,"is_linkpost":false,"is_mention":false,"is_podcast":false,"note":"","syndication":[]}},{"id":"13742118","content_html":"Diving into Mastodon head-on without having RTFM ... ;-)I'm a science writer about all things space based in Bochum, Germany, where I'm also active at the planetarium.Been blogging on skyweek.wordpress.com since 2009 and tweeting on Twitter as @cosmos4u since 2008 but been on the WWW re... <a href=\"https://scicomm.xyz/@cosmos4u/109293888726738124\">scicomm.xyz</a>","summary":"","url":"https://scicomm.xyz/@cosmos4u/109293888726738124","date_published":"2022-11-05T23:53:13+00:00","author":{"name":"Daniel Fischer","url":"https://scicomm.xyz/@cosmos4u","avatar":"https://cdn.micro.blog/photos/96/https%3A%2F%2Fmedia.scicomm.xyz%2Faccounts%2Favatars%2F109%2F292%2F188%2F659%2F580%2F245%2Foriginal%2F7625444802c7068f.jpg","_microblog":{"username":"cosmos4u@scicomm.xyz"}},"_microblog":{"date_relative":"2022-11-05 23:53","date_timestamp":1667692393,"is_favorite":false,"is_bookmark":false,"is_deletable":false,"is_conversation":false,"is_linkpost":false,"is_mention":false,"is_podcast":false,"note":"","syndication":[]}}]}