Salva Bará
@salvabara.bsky.social
Physicist. Light pollution researcher - Former Prof. Titular at Univ. de Santiago de Compostela, Galiza (European Union)
https://salvabara.blogspot.com/
https://salvabara.blogspot.com/
Pinned
Salva Bará
@salvabara.bsky.social
· Oct 1
Wind farms and light pollution:
Medium-intensity turbine lights can be brighter than the brightest stars and planets on the night sky up to significant distances. This should be taken into account in environmental impact assessments.
Version of record, open access: doi.org/10.1016/j.jq...
Medium-intensity turbine lights can be brighter than the brightest stars and planets on the night sky up to significant distances. This should be taken into account in environmental impact assessments.
Version of record, open access: doi.org/10.1016/j.jq...
Reposted by Salva Bará
My projects have always done all-sky measurements under all conditions because I'm concerned with the effects on wildlife, as well as interested in seeing the stars. For example, this paper --> iopscience.iop.org/article/10.1... where we show the influence of the % clouds on illuminance.
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iopscience.iop.org
November 6, 2025 at 3:40 AM
My projects have always done all-sky measurements under all conditions because I'm concerned with the effects on wildlife, as well as interested in seeing the stars. For example, this paper --> iopscience.iop.org/article/10.1... where we show the influence of the % clouds on illuminance.
Reposted by Salva Bará
“From 2020 onward, a strong rise in space waste mass influx to the atmosphere can be seen. ... This indicates a substantial risk of long-term adverse effects on the atmosphere such as ozone depletion, radiative effects and changes in cloud formation, if no action is taken.”
arxiv.org/abs/2510.21328
arxiv.org/abs/2510.21328
Space waste: An update of the anthropogenic matter injection into Earth atmosphere
Large satellite constellations are one of the main reasons for an increasing amount of mass being brought into low Earth orbit in recent years. After end of life, the satellites, as well as rocket sta...
arxiv.org
November 9, 2025 at 8:32 PM
“From 2020 onward, a strong rise in space waste mass influx to the atmosphere can be seen. ... This indicates a substantial risk of long-term adverse effects on the atmosphere such as ozone depletion, radiative effects and changes in cloud formation, if no action is taken.”
arxiv.org/abs/2510.21328
arxiv.org/abs/2510.21328
A call for scientists to halt the spoiling of the night sky with artificial light and satellites
Scientists should do more to stand up to ‘big light’ and ‘big space’ and preserve this natural resource.
Nature Astro online www.nature.com/articles/s41...
arXiv: arxiv.org/abs/2307.00598
Scientists should do more to stand up to ‘big light’ and ‘big space’ and preserve this natural resource.
Nature Astro online www.nature.com/articles/s41...
arXiv: arxiv.org/abs/2307.00598
A call for scientists to halt the spoiling of the night sky with artificial light and satellites
Nature Astronomy - Unfettered access to dark night skies is rapidly diminishing, due to light pollution and satellite constellation tracks. Scientists should do more to stand up to ‘big...
www.nature.com
November 9, 2025 at 5:47 PM
A call for scientists to halt the spoiling of the night sky with artificial light and satellites
Scientists should do more to stand up to ‘big light’ and ‘big space’ and preserve this natural resource.
Nature Astro online www.nature.com/articles/s41...
arXiv: arxiv.org/abs/2307.00598
Scientists should do more to stand up to ‘big light’ and ‘big space’ and preserve this natural resource.
Nature Astro online www.nature.com/articles/s41...
arXiv: arxiv.org/abs/2307.00598
Reposted by Salva Bará
Deep-sea mining starves life in the ocean’s twilight zone www.sciencedaily.com/releases/202... 🦑🌎🧪
Deep-sea mining starves life in the ocean’s twilight zone
Scientists have discovered that deep-sea mining plumes can strip vital nutrition from the ocean’s twilight zone, replacing natural food with nutrient-poor sediment. The resulting “junk food” effect…
www.sciencedaily.com
November 8, 2025 at 8:03 PM
Deep-sea mining starves life in the ocean’s twilight zone www.sciencedaily.com/releases/202... 🦑🌎🧪
Reposted by Salva Bará
Lights out: can we stop glow-worms and fireflies fading away?
Lights out: can we stop glow-worms and fireflies fading away?
From night walks with children to switching off streetlights and rewilding areas, naturalists are working to save Europe’s dwindling populations
www.theguardian.com
November 7, 2025 at 4:17 PM
Lights out: can we stop glow-worms and fireflies fading away?
Reposted by Salva Bará
Reposted by Salva Bará
🚨Three Chinese astronauts couldn’t return to Earth after space junk hit their spacecraft. Scientists warn this could be just the first of more accidents caused by orbital debris.
The situation is concerning. “There are a lot of people up there,” one source told me.
My story @sciam.bsky.social 🧪
The situation is concerning. “There are a lot of people up there,” one source told me.
My story @sciam.bsky.social 🧪
A Piece of Space Junk Hit Their Ride Home. What Does This Mean for Space Exploration?
Three Chinese astronauts will likely return safely to Earth after a reported space-junk strike. But the incident highlights the growing risk of orbital debris
www.scientificamerican.com
November 7, 2025 at 6:46 PM
🚨Three Chinese astronauts couldn’t return to Earth after space junk hit their spacecraft. Scientists warn this could be just the first of more accidents caused by orbital debris.
The situation is concerning. “There are a lot of people up there,” one source told me.
My story @sciam.bsky.social 🧪
The situation is concerning. “There are a lot of people up there,” one source told me.
My story @sciam.bsky.social 🧪
"Grass spiders build webs near artificial light (...) Artificial light has a greater influence on web placement than do prey"
From
"Web placement in grass spiders (Agelenopsis pennsylvanica) is driven more by artificial light at night than by prey" by Walsh et al (paywalled)
doi.org/10.1016/j.an...
From
"Web placement in grass spiders (Agelenopsis pennsylvanica) is driven more by artificial light at night than by prey" by Walsh et al (paywalled)
doi.org/10.1016/j.an...
Redirecting
doi.org
November 6, 2025 at 10:30 PM
"Grass spiders build webs near artificial light (...) Artificial light has a greater influence on web placement than do prey"
From
"Web placement in grass spiders (Agelenopsis pennsylvanica) is driven more by artificial light at night than by prey" by Walsh et al (paywalled)
doi.org/10.1016/j.an...
From
"Web placement in grass spiders (Agelenopsis pennsylvanica) is driven more by artificial light at night than by prey" by Walsh et al (paywalled)
doi.org/10.1016/j.an...
Reposted by Salva Bará
Insightful paper about distance to cities and cloud composition for the distribution and reflection of light pollution. These kind of measurements should become standard for monitoring, eg, of urban lighting impacts particularly on biodiversity beyond the urban environment.
A very important step forward in our understanding of light pollution under cloudy skies, by Miroslav Kocifaj, Fabio Falchi and Frantisek Kundracik
"An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions"
www.pnas.org/doi/10.1073/...
"An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions"
www.pnas.org/doi/10.1073/...
An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions | PNAS
Light pollution has been traditionally modeled using clear or completely overcast
conditions. Usually, atmospheric conditions are more complex and ...
www.pnas.org
November 5, 2025 at 8:33 PM
Insightful paper about distance to cities and cloud composition for the distribution and reflection of light pollution. These kind of measurements should become standard for monitoring, eg, of urban lighting impacts particularly on biodiversity beyond the urban environment.
Reposted by Salva Bará
I'm used to the usual effect of clouds (reflection of light pollution, darkening of the natural sky), but it's interesting to see the zenith being darker than "normal" once the sky overhead cleared but Montreal was still covered, and that the zenith became brighter once the sky cleared over Montreal
November 3, 2025 at 5:00 PM
I'm used to the usual effect of clouds (reflection of light pollution, darkening of the natural sky), but it's interesting to see the zenith being darker than "normal" once the sky overhead cleared but Montreal was still covered, and that the zenith became brighter once the sky cleared over Montreal
Reposted by Salva Bará
This reminds me of a very interesting observation a couple in 2022:
While taking SQC measurements from a park in Montreal's suburbs, I noticed that the zenith became darker just after the clouds cleared overhead but were still covering Montreal (2nd image). The clouds acted like a blanket over MTL
While taking SQC measurements from a park in Montreal's suburbs, I noticed that the zenith became darker just after the clouds cleared overhead but were still covering Montreal (2nd image). The clouds acted like a blanket over MTL
November 3, 2025 at 4:53 PM
This reminds me of a very interesting observation a couple in 2022:
While taking SQC measurements from a park in Montreal's suburbs, I noticed that the zenith became darker just after the clouds cleared overhead but were still covering Montreal (2nd image). The clouds acted like a blanket over MTL
While taking SQC measurements from a park in Montreal's suburbs, I noticed that the zenith became darker just after the clouds cleared overhead but were still covering Montreal (2nd image). The clouds acted like a blanket over MTL
November 1, 2025 at 12:43 AM
Reposted by Salva Bará
Book or paper reference request: I'm looking for histories of technology and electrification in the Gilded Age and the political and environmental context. In the vein of Empires of Light by Jill Jonnes, David Nye's Electrifying America, or Jeremy Zallen's American Lucifers, but in addition.
October 31, 2025 at 6:08 PM
Book or paper reference request: I'm looking for histories of technology and electrification in the Gilded Age and the political and environmental context. In the vein of Empires of Light by Jill Jonnes, David Nye's Electrifying America, or Jeremy Zallen's American Lucifers, but in addition.
A very important step forward in our understanding of light pollution under cloudy skies, by Miroslav Kocifaj, Fabio Falchi and Frantisek Kundracik
"An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions"
www.pnas.org/doi/10.1073/...
"An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions"
www.pnas.org/doi/10.1073/...
An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions | PNAS
Light pollution has been traditionally modeled using clear or completely overcast
conditions. Usually, atmospheric conditions are more complex and ...
www.pnas.org
October 31, 2025 at 6:50 PM
A very important step forward in our understanding of light pollution under cloudy skies, by Miroslav Kocifaj, Fabio Falchi and Frantisek Kundracik
"An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions"
www.pnas.org/doi/10.1073/...
"An all-sky light pollution model for global-scale applications that embraces a full range of cloud distributions"
www.pnas.org/doi/10.1073/...
Reposted by Salva Bará
AquaPLAN coordinator Elena Maggi @dipbiounipi.bsky.social was an invited speaker at 9th International Artificial Light at Night Conference #ALAN2025 today, @darkskyireland.bsky.social & @mayodarkskies.bsky.social hosting in Ireland. Her talk: "Coastal light pollution: a multi-stressor perspective"
Day two of the Artitifical Light at Night Conference begins with fresh, cold Mayo morning air and a keynote by Elena Maggi on the marine light pollution research being undertaken by @aquaplan.bsky.social. 🌊🐟🐙💡
@darkskyireland.bsky.social @mayodarkskies.bsky.social #ALAN2025
@darkskyireland.bsky.social @mayodarkskies.bsky.social #ALAN2025
October 29, 2025 at 2:05 PM
AquaPLAN coordinator Elena Maggi @dipbiounipi.bsky.social was an invited speaker at 9th International Artificial Light at Night Conference #ALAN2025 today, @darkskyireland.bsky.social & @mayodarkskies.bsky.social hosting in Ireland. Her talk: "Coastal light pollution: a multi-stressor perspective"
O próximo martes 4 de novembro o noso colega Dr. John Barentine, do @space-environment.bsky.social (CSE) falará na Coruña sobre "The protection of Space".
Será ás 19:30 no Planetario da Casa das Ciencias agrupacionio.com/gl/portfolio...
Vémonos alí!
Será ás 19:30 no Planetario da Casa das Ciencias agrupacionio.com/gl/portfolio...
Vémonos alí!
VI Encontro da Noite: John C. Barentine – Agrupación ÍO
agrupacionio.com
October 30, 2025 at 1:37 PM
O próximo martes 4 de novembro o noso colega Dr. John Barentine, do @space-environment.bsky.social (CSE) falará na Coruña sobre "The protection of Space".
Será ás 19:30 no Planetario da Casa das Ciencias agrupacionio.com/gl/portfolio...
Vémonos alí!
Será ás 19:30 no Planetario da Casa das Ciencias agrupacionio.com/gl/portfolio...
Vémonos alí!
And this is how they steal the night sky from us
October 30, 2025 at 1:26 PM
And this is how they steal the night sky from us
Reposted by Salva Bará
See You at ENLIGHT 2025!
Together, we’ll share research, strategies, and inspiration to reduce light pollution and safeguard the beauty of our night skies.
📅 28–30 November | Novi Sad, Serbia
@salvabara.bsky.social @aquaplan.bsky.social
#lightpollution #ALAN
Together, we’ll share research, strategies, and inspiration to reduce light pollution and safeguard the beauty of our night skies.
📅 28–30 November | Novi Sad, Serbia
@salvabara.bsky.social @aquaplan.bsky.social
#lightpollution #ALAN
October 24, 2025 at 1:31 PM
See You at ENLIGHT 2025!
Together, we’ll share research, strategies, and inspiration to reduce light pollution and safeguard the beauty of our night skies.
📅 28–30 November | Novi Sad, Serbia
@salvabara.bsky.social @aquaplan.bsky.social
#lightpollution #ALAN
Together, we’ll share research, strategies, and inspiration to reduce light pollution and safeguard the beauty of our night skies.
📅 28–30 November | Novi Sad, Serbia
@salvabara.bsky.social @aquaplan.bsky.social
#lightpollution #ALAN
Reposted by Salva Bará
The 9th International Conference on Artificial Light at Night (ALAN2025) will be taking place next week from 28th-30th October in Westport, Ireland. This year’s speakers include AquaPLAN’s coordinator Elena Maggi from the University of Pisa. For more information go to: artificiallightatnight.org
Welcome To ALAN 2025 | Artificial Light At Night Conference | Light Pollution | Science
ALAN is the largest international scientific conference on the impacts of artificial light at night, covering the topics of biology & ecology, governance & regulation, health, measurement & modeling, ...
artificiallightatnight.org
October 24, 2025 at 1:46 PM
The 9th International Conference on Artificial Light at Night (ALAN2025) will be taking place next week from 28th-30th October in Westport, Ireland. This year’s speakers include AquaPLAN’s coordinator Elena Maggi from the University of Pisa. For more information go to: artificiallightatnight.org
Reposted by Salva Bará
Congestion and pollution in Earth orbit is quickly getting worse. We need to be able to quantify how our behaviour will impact the orbital environment in the future...
Sounding the alarm: ESA introduces space environment ‘health index’
The congestion and pollution of Earth orbit is quickly getting worse. We need to be able to quantify how our behaviour impacts the orbital environment in the future. To this end, the European Space Ag...
www.esa.int
October 22, 2025 at 2:45 PM
Congestion and pollution in Earth orbit is quickly getting worse. We need to be able to quantify how our behaviour will impact the orbital environment in the future...
Agora que está de moda citar o vello Albert non deixen de ter a man unha fonte autorizada. Esta obra de Alice Calaprice, quen traballou nos Einstein Archives en Princeton e coeditou con John Stachel os Collected Papers of A. Einstein, vailles ser de utilidade
press.princeton.edu/books/hardco...
press.princeton.edu/books/hardco...
The Ultimate Quotable Einstein
The most comprehensive collection of Einstein quotations ever published
press.princeton.edu
October 22, 2025 at 8:45 PM
Agora que está de moda citar o vello Albert non deixen de ter a man unha fonte autorizada. Esta obra de Alice Calaprice, quen traballou nos Einstein Archives en Princeton e coeditou con John Stachel os Collected Papers of A. Einstein, vailles ser de utilidade
press.princeton.edu/books/hardco...
press.princeton.edu/books/hardco...
"Today, we face a clear moral and ethical choice: science can serve the interests of war, power, and profit—or it can serve humanity, peace, and justice. We choose the latter."
www.iuscientists.org/stand-with-s...
www.iuscientists.org/stand-with-s...
Stand with Scientists Against War and Militarization of Science: Endorse the IUS Statement
The Statement is issued by the International Union of Scientists (IUS) Against Militarism and the Destructive Use of Science and Technology, on 29 June 2025.
Endorse the Statement here.
The Stateme...
www.iuscientists.org
October 22, 2025 at 4:09 PM
"Today, we face a clear moral and ethical choice: science can serve the interests of war, power, and profit—or it can serve humanity, peace, and justice. We choose the latter."
www.iuscientists.org/stand-with-s...
www.iuscientists.org/stand-with-s...
