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#lightpollution

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JohnBarentine
Dr. John Barentine FRAS @JohnBarentine@scicomm.xyz · Aug 03, 2026
When cities transition to LED streetlights, the results can sometimes worsen urban skyglow. But it does not have to be that way. Our latest post compares three global cities that successfully modernized their public lighting while drastically reducing light pollution. Tucson proved the value of reducing total lumen output to avoid the rebound effect. Vienna demonstrated that strict optical shielding and zero upward light can cut streetlight skyglow by 75 percent over a decade. Metz pioneered ecological spectral management, using ultra-warm 1000 K LEDs and smart sensors to protect river wildlife. Learn how these three strategies create a blueprint for dark-sky-friendly urban lighting: http://www.darkskyconsulting.com/blog/tucson-vienna-metz-a-tale-of-three-cities #LightPollution #DarkSkies #StreetLighting
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DoomsdaysCW
DoomsdaysCW @DoomsdaysCW@kolektiva.social · Aug 03, 2026
How headlights got brighter, whiter, and more blinding after dark Excerpt: "Older halogen setups, particularly the reflector housings common through the 1980s, 1990s, and early 2000s, produced a comparatively soft, warm beam with limited reach. They were inefficient, generated excessive heat, and scattered light somewhat indiscriminately. But they tended to fail gracefully. Visibility wasn’t exceptional, but neither was the likelihood of accidentally assaulting an oncoming driver’s eyes. "Modern systems have an entirely different engineering goal. LEDs consume less power, last far longer, and can emit vastly more light from a much smaller package. Their compactness allows designers to create thinner headlights and more aggressive front-end styling, but it also means the light source itself becomes intensely concentrated. Automakers have additionally shifted toward cooler color temperatures—closer to daylight white than the yellowish glow of old halogens—because we perceive these wavelengths as sharper and more detailed at night. "The downside is that blue-white light also produces more glare and discomfort, especially in rain or on poorly marked roads. Add in the current #SUV and #PickupTruck boom, where headlights are mounted higher off the ground than on older sedans, and even correctly aimed low beams can shine directly into the eyeline of drivers in smaller vehicles. "Then there’s the escalation effect. Modern vehicles are heavier, faster, quieter, and packed with driver-assistance systems that encourage confident nighttime driving at highway speeds [and encourage drivers to STOP paying attention]. To support that, manufacturers continuously increase forward illumination distance and beam intensity. "Adaptive matrix headlights, which can selectively dim portions of the beam to avoid dazzling other drivers while maintaining maximum illumination elsewhere, are theoretically the technological solution to the problem. In practice, though, adoption remains inconsistent, regulations vary by country, and many vehicles still rely on brute-force brightness rather than precision. The result is that nighttime driving increasingly feels less like navigating through darkness and more like surviving a rolling photonics demonstration from the consumer electronics industry. "According to 2019 to 2023 Fatality Analysis Reporting System (FARS) data, 46,154 fatalities on US roads were due to crashes at night and in non-lit areas. 446 were due to glare impeding the driver’s vision." https://arstechnica.com/cars/2026/08/how-headlights-got-brighter-whiter-and-more-blinding-after-dark/ #BanBrightHeadlights #BanSUVs #LightPollution #RoadSafety
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astrodisastro
Francesca Bo. @astrodisastro@scicomm.xyz · Jul 10, 2026
RE: https://mastodon.social/@sundogplanets/116893541666491703 I won't comment on how incredibly stupid the FCC's justifications for approving this disaster are; as a European, I'll say that satellite launches have global consequences and should be regulated by a global body and be under the jurisdiction of international courts. The sky is not US private property. Also, Reflect Orbital just managed to be even more disgusting than they already were, by trying to speculate on the earthquake in Venezuela. #LightPollution #satellites #space #techbros #environment
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Prof. Sam Lawler @sundogplanets@mastodon.social
FUCK FUCK FUCK FUCK NOOOOO https://ca.pcmag.com/news/16760/fcc-approves-reflect-orbitals-giant-mirror-satellite-that-astronomers-hate
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dalfen
ˈdälfən™🐬 💥 🌊 @dalfen@mstdn.social · Jul 17, 2026
~"The full complement of #satellites... could collectively make the global night sky 3 to 4 times brighter than it is today... Even the planet’s darkest skies could become about as bright as the heavens above a suburban town..." #US approval of giant ‘space mirror’ satellite alarms astronomers ~ ~"A controversial new ruling from #FCC leaves no one responsible for regulating #LightPollution & other ill effects from skyrocketing numbers of satellites" #USA #astronomy -- https://www.scientificamerican.com/article/u-s-approval-of-giant-space-mirror-satellite-alarms-astronomers/
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skyglowberlin
Christopher Kyba 🇨🇦🇪🇺 @skyglowberlin@fediscience.org · Jul 15, 2026
This is AWESOME! Cast members from different #StarTrek series make the case for reducing #LightPollution and preserving our ability to experience the stars from here on Earth: https://www.youtube.com/watch?v=Hc2zeKd-xf0 #DarkSkyInternational #StarTrek60
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juliette
juliette @juliette@mastodon.green · Jul 13, 2026
I am researching ways to minimize the impact of light pollution on wildlife of all sizes, with a focus on insects, in an industrial area. "Just turn it all off" is off the table, but I can make arguments for reducing it. I want to find out what is actually effective. So far I found one article listing some options: https://www.sciencedirect.com/science/article/pii/S2214574524001184 Anyone here with strong opinions on this topic? #LightPollution #insects
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b҉ @b@convo.casa · Jul 11, 2026
Replying to @b@convo.casa
https://ca.pcmag.com/news/16760/fcc-approves-reflect-orbitals-giant-mirror-satellite-that-astronomers-hate On Thursday, the FCC granted the California-based Reflect Orbital permission to launch and operate the satellite in low-Earth orbit using the requested radio spectrum. The reflected light from satellite is supposed to span an area of about three miles wide on the ground. #reflectOrbital #fcc #USPOL #MAGA #corruption #classwar #lightpollution
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b҉ @b@convo.casa · Jul 11, 2026
https://darksky.org/news/organizational-statement-reflect-orbital/ Reflect Orbital, a planned orbital illumination system, proposes to use in-space mirrors mounted on satellites to reflect sunlight down to Earth at night. The company has described the capability to provide “sunlight on demand” through satellite constellations designed to illuminate areas up to 5 kilometers wide at intensities between 0.8 and 2.3 lux—several times brighter than a full moon. To achieve these levels, multiple satellites would be required for each target area, with illumination lasting only a few minutes as satellites pass overhead. Reflect Orbital has outlined plans for thousands of satellites and is seeking FCC approval to launch its first prototypes in 2026. #reflectOrbital #fcc #USPOL #MAGA #corruption #classwar #lightpollution
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AstroHawk
Astro Hawk (Ian Kluft) ✅🚀🛰️ @AstroHawk@spacey.space · Jul 09, 2026
"This is one hour of satellite trails over the world's darkest sky. Astronomers say nearly 2 million planned satellites could be 'devastating" by BBC @skyatnightmag@flipboard.com - Study by European Southern Observatory ESO concurs with other astronomers that planned satellite constellations totaling over 1 million objects in orbit are disastrous for #astronomy. It estimates overwhelming obstruction above 100,000 total objects. https://www.skyatnightmagazine.com/news/eso-study-satellite-trails #science #LightPollution #satellite #space #environment
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DoomsdaysCW
DoomsdaysCW @DoomsdaysCW@kolektiva.social · Jul 10, 2026
RE: https://c.im/@RadicalAnthro/116894549247368606 #BrendanCarr and #SpaceNazis have to fuck with everything! #DarkSkies #LightPollution #TrumpSucks
Quoting
Radical Anthropology @RadicalAnthro@c.im
RE: https://mastodon.social/@sundogplanets/116893541666491703 Don't fuck with the night sky!
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FusionPartyAus
Fusion Party Australia @FusionPartyAus@mastodon.au · Jul 07, 2026
Our night sky is a commons. Cities are poisoning it with wasteful LED floods. Proper dark-sky lighting exists. We're just choosing profit over stars. https://www.savingourstars.org/darkskylighting #auspol #fusionparty #SaveOurNightSky #LightPollution #EnergyEfficiency
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skyglowberlin
Christopher Kyba 🇨🇦🇪🇺 @skyglowberlin@fediscience.org · Jun 19, 2026
Any astronomers looking for a wild new job? I got a message from an ecologist in Belgium today, and he's looking for a postdoc with experience in photometry to work on analysis of all-sky imagery for an experiment on the impact of #LightPollution on birds. This is not a job offer! He would work together with the candidate on an internal university grant. If anyone is interested (PhD in #astronomy or closely related field required), send me a message.
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santiago
Santiago 🔭🪐 @santiago@mastodon.uy · Mar 30, 2026
Muy buena nota a Florencia Reichmann sobre contaminacion lumínica. La conozco, colaboro en un proyecto con ella y es probablemente la persona que más sabe sobre este tema en el país https://ladiaria.com.uy/ambiente/articulo/2026/3/florencia-reichmann-no-hay-ninguna-reglamentacion-ni-normativa-que-limite-la-emision-de-luz-nocturna-artificial-en-uruguay/ #contaminación #lumínica #contaminacionluminica #lightpollution #darksky #uruguay #gestionambiental
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santiago__dup_36197
Santiago :arandela: @santiago__dup_36197@mastodon.uy · Feb 25, 2026
@sundogplanets@mastodon.social probably you already knew this but i just came across this thanks to a colleague of mine that sent me tho link. Amazon satellites are pretty bright --> https://arxiv.org/pdf/2601.07708 Abstract: "The mean apparent magnitude of Amazon Leo satellites is 6.28 based on 1,938 observations. For spacecraft in their operational mode, 92% exceeded the brightness limit recommended by the IAU for interference with research, while 25% distract from aesthetic appreciation of the night sky. The reflective characteristics are similar to Version 1 Starlink spacecraft." #satellites #amazon #megaconstellations #skypollution #satellitepollution #lightpollution #space #astronomy
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santiago__dup_36197
Santiago :arandela: @santiago__dup_36197@mastodon.uy · Feb 23, 2026
Esta es una gran entrevista a la astrónoma Sam Lawler. Ella vive en Canadá y es una referente en la lucha contra la contaminación lumínica y las megaconstelaciones de satélites artificiales. Además, ella está acá en Mastodon como @sundogplanets@mastodon.social Este video se merece mucho más circulación, asique compas del fedi, agradezco que lo impulsen https://www.youtube.com/watch?v=-kqNbrPNFSA #astronomy #astronomía #lightpollution #sky #darksky #nightsky #fediverse #science
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tiggy
Tiggy @tiggy@mastodonapp.uk · Feb 21, 2026
We used to get them swooping over our bungalows, until the new neighbours opposite put up strong lights that shine all night. They face into the shared lawn and across into my home. I don't know how they got permission or why they thought they needed to light up the internal garden. A major nuisance when I needed to sleep on the recliner post-op, but even worse for local wildlife. https://www.bbc.co.uk/news/articles/cly9d6vrxpwo #LightPollution #Birds
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