David GaladíEnríquez 🐀 @DGaladi@red.niboe.info

So maybe putting 100,000 satellites in low Earth orbit with short lifetimes and designed to burn up in the atmosphere is not a good idea after all. #whodathought?!
#megaconstellations #nightmare

In the news: https://www.msn.com/en-us/news/technology/elon-musks-starlink-satellites-could-burn-up-the-ozone-layer-scientists-warn/ar-BB1oryEE

The science article:
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109280

Ready for a bit more #TechBro #Dystopia?

Satellite internet will probably severely damage the ozone layer.

The worst about it?

The damage is not now, but it will take decades before it starts.

But: First things first!

What is the ozone layer?

The ozone layer is located in the lower stratosphere (15-35km above ground), where the concentration of ozone (O₃) is highest. This layer shields us from most of, otherwise deadly, UV radiation from the sun.

1/9

Las estrellas son sueños que hemos creado y no podemos alcanzar.

Eso pensé desde el marco de la ventana de mi habitación, las noches que me sabían a terminar una película para dos, y no tener con quién empujar el mundo hacia el otro lado de final abierto.

La luna está ahí, igual de lejos e inalcanzable que siempre y, sin embargo, tiene huellas de lo perseverante que puede llegar a ser el hombre.

Ojalá estudiaran el amor en la NASA para entender y proteger el corazón, de cualquier meteorito que viaja a la velocidad de un no por respuesta.

Supongo que hay sueños como estrellas, de todos los tamaños y colores. Para mi sorpresa, las de color rojizo o anaranjado son las más frías, mientras que las blancas o azuladas indican una temperatura mayor en su superficie.

El brillo se lo dejo a la poesía porque hay quién las mira y no ve nada, quién solo ve a quién ya no está cuando las mira, y quién, como yo, que las mira buscando signos de esperanza.

#escribir #relatos #sueños #estrellas

Adding up to 360 metric tons of aluminium oxide per year to the atmosphere due to disposing of mega-constellation (Starlink etc) satellites might create ozone depletion amongst other as of yet unknown effects. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109280

I'm sad to report the death of Ed Stone, the NASA scientist who was the heart & soul of the Voyager program. Spending time with him for my Discover magazine profile was a highlight of my career.

I did my best to capture the experience:
https://www.discovermagazine.com/the-sciences/voyager-the-man-behind-the-mission #science #space #nasa #astronomy

Very sad to hear of the passing of Ed Stone, who has died at the age of 88.

Best known perhaps as the project scientist for the Voyager missions to Jupiter, Saturn, Uranus, & Neptune from 1972 to 2022, Ed played a key role in the history of space science, including 10 years leading NASA JPL.

I met him at a space particle & fundamental physics conference at CERN in 2012, where I took these pictures. Originals: https://flic.kr/s/aHsjCM5rJJ

Ad astra, Ed ✨

#SpaceScience #SpaceExploration #Astrodon

Ahora porque ya es muy tarde pero si queréis mañana explico por qué el mantra ese de "la izquierda debe hacer autocrítica" que se repite cada convocatoria electoral tiene poco recorrido porque muchachada, las cosas no funcionan así. Esto no es un juego en el que todos juegan con las mismas reglas. Y cuánto antes lo entendamos, tanto mejor.

"[W]e argue that in order to manage #LEO sustainably, we must overcome what we call ‘atmosphere-blindness’: our limited understanding of space-Earth system links through orbital disposal practices and their atmospheric impacts."

https://journals.sagepub.com/doi/full/10.1177/20530196241255088

#Space #SpaceSustainability #Satellites #Atmosphere #Pollution

El domingo se vota fuertecito, mastodoniers. Que no me entere yo que se queda una papeleta antifascista en casa, como no votéis contra la ultraderecha me presento en vuestros hogares y os agrío la leche, enfermo vuestros campos y me llevo al primogénito sea bebé, gato, perro o periquito.

The only feeling I have about starship is dread.

They want to use that to launch batches of HUNDREDS of Starlinks at once. And guess where all those Starlinks will end up? The pieces that don't make it to the ground will end up in our upper atmosphere, screwing up the stratosphere, the ozone layer, who knows what else because SpaceX isn't required to do any environmental assessments of this.

Shit. Maybe a good time to post this essay I wrote yet again: https://theconversation.com/an-astronomers-lament-satellite-megaconstellations-are-ruining-space-exploration-215653

(I forgot to mention like a week ago that it was) #PaperDay!
Here our group shows the 1st successful theoretical model that predicts the degree & angle of linear #polarization of scattered night-sky #light accounting for ground light sources. A 🧵 (1/14)

https://academic.oup.com/mnrasl/article/532/1/L70/7682394

#LightPollution #DarkSkies #NightSky #Astronomy

Crixiv 2 🇵🇸 en X: "More people were killed by US Customs and Border Patrol in 2022 than died at the Berlin Wall in its entire 28-year existence. https://t.co/0aEuxHRpme" / X
https://x.com/solzhenidiot/status/1798540946319225321

Asteroides desintegrados en la atmósfera terrestre (1994 – 2013) https://mapasmilhaud.com/mapas-geograficos/asteroides-desintegrados-en-la-atmosfera-terrestre-1994-2013/