🚫 NON Á CENSURA. A CIG-Ensino chama a protestar nos centros contra a inxerencia política da Xunta
💪 O sindicato exixe a retirada das instrucións aínda non remitidas aos centros e a súa negociación na Mesa Sectorial.
Salva Bará
Light pollution researcher. Former profesor titular de Óptica (retired) at Universidade de Santiago de Compostela, Galicia (European Union). More info: https://salvabara.blogspot.com/
@elbuhocurioso @JohnBarentine @XF9 Same here ;)
@georgetakei All the best, George!
Salva Bará boosted:
Academic publishing needs a radical rethink—and we’re hosting a conversation on how to get there.
Björn Brembs @brembs will explore the roadmap toward a community-governed, open infrastructure for scholarly communication.
Don't miss it!
🔗 https://us02web.zoom.us/meeting/register/_q0pigTgS6iMuilivfcSkw#/registration
Salva Bará boosted:
Un rayo corriendo entre las nubes. Hace un ratito en Valladolid. Vídeo a cámara lenta.
Salva Bará boosted:
Is it your imagination, or are car #headlights getting brighter?
@salvabara scoured the web and crunched the numbers to make this graph. It shows that car headlights on average have gotten quite a bit brighter in the last decade, and that the rate of increase is higher for low beams than for high beams.
Preprint here: https://zenodo.org/records/15565958
Related news: some headlight manufacturers are intentionally selling "brighter than allowed" headlights by engineering dark spots where the sensors that check for glare are used: https://www.theringer.com/2024/12/03/tech/headlight-brightness-cars-accidents?lid=dpe6tiyd81ev
This is part and parcel with the vehicle size issue in the US, where the general principle seems to be "my car should be the biggest and the brightest". But while cars get bigger and brighter, deaths from collisions are rising - how shocking...
@skyglowberlin @KevinFreitas This Zenodo preprint deals with the total light emissions. But yes, everything else being equal, more intensity leads to more glare. The specific glare effects associated with the increase of intensity of vehicle lights have been previously reported (and are still commented) by the moderators and contributors to https://www.reddit.com/r/fuckyourheadlights/ whose pioneering work is highly appreciated.
@skyglowberlin Thanks for the mention, Chris. The 'engineered dark spot' reported in the story of your link should be included in the permanent exhibit of any Museum of Fraud...
"(...) We argue, that science should never again become involved in the preparation of war, and take seriously the lessons from World War II, lessons which led to the foundation of CERN and the Science4Peace idea."
Altmann et al. Science for Peace and the need for...
https://arxiv.org/abs/2505.22476
Salva Bará boosted:
Someone clearly didn't watch enough Sesame Street growing up. https://www.comicsands.com/riley-gaines-kermit-commencement?utm_source=mastodon&utm_medium=infeed&utm_campaign=linkprogram
Salva Bará boosted:
A Letter to Europe
https://fed.brid.gy/r/https://paulkrugman.substack.com/p/a-letter-to-europe
A short report and some thoughts on Light pollution regulations in the kingdom of Spain: challenges and perspectives, available in Zenodo (open access)
https://doi.org/10.5281/zenodo.15400020
Salva Bará boosted:
Je devrais écrire un nouveau billet de blogue la série : Non, on n'a pas trouvé d'extraterrestres.
Possible sign of life in deep space faces new doubts https://phys.org/news/2025-05-life-deep-space.html
Very bad news for world peace, and also for the sustainability of the space surrounding the Earth.
https://www.lockheedmartin.com/en-us/capabilities/missile-defense/golden-dome-missile-defense.html
Orbital debris news from NASA
Salva Bará boosted:
"Researchers project that active #satellites could skyrocket to 1,00,000 before stabilising, a threshold considered the 'carrying capacity' of the #LEO. This limit, where collision risks become significant, could be reached by 2050 at current launch rates. ... Scientists are urging a slowdown in launches until global regulations can address these issues.”
Salva Bará boosted:
Non perdas a proxección de Filtrando a Luz, documental sobre a memoria do ecoloxismo galego, no Teatro Principal de Pontevedra organizado pola Asociación Pola Defensa da Ría
Xoves 22 de maio ás 20h.
Con importante protagonismo da celulosa de Pontevedra e do proxecto da celulosa de Altri na Ulloa
Salva Bará boosted:
Fez dia 15 quatro anos que publicámos a carta aberta sobre poluição luminosa em Portugal. Até agora, só houve agravamento.
From: @raulclima
https://mastodon.green/@raulclima/109450082278858597
Salva Bará boosted:
"Space is being commercialised on a scale unseen before. Faced by powerful commercial and political forces and with scant legal protections, artefacts that tell the story of our species' journey into space are in danger of being lost – both in orbit and down here on Earth. Like Stonehenge, these are irreplaceable artefacts and sites that have a timeless significance to humanity because they represent an essential stage in the evolution of our species."
Salva Bará boosted:
I'm pleased to share this recently published paper led by University of San Francisco undergraduate student Alex Meza in which I played the smallest part. In it, we examine light pollution as a threat to #pollinators that support #Indigenous #FoodSecurity and sovereignty.
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