David GaladíEnríquez 🐀 @DGaladi@red.niboe.info

En el blog > El estado del medioambiente espacial según la Agencia Espacial Europea
https://danielmarin.naukas.com/2024/08/18/el-estado-del-medioambiente-espacial-segun-la-agencia-espacial-europea/

112 years and one day ago. #climate

Se ha ido uno de los grandes https://www.lanasa.net/noticias/newsnasa/nos-dejo-carlos-gonzalez-pintado-primera-persona-en-escuchar-la-famosa-frase-desde-la-luna

"Here Comes The Sun"
Manchas grandes, manchas pequeñas, fáculas... el sol más activo que nunca. Fotos del jueves 8-08-2024 con el equipo habitual. #Sun #Sol #astronomia #astrophoto #astrophotography

Some stats on space debris from ESA's Space Debris Office.

Estimated number of space debris objects larger than 10 cm = 40,500. Over 50% in LEO (below 2,000 km).
Estimated number of space debris objects 1 cm to 10 cm = 1.1 million.
Estimated number of space debris objects 1 mm to 1 cm = 130 million!

What does the future hold?
10's of thousands of LEO satellites are planned.
Is Kessler Syndrome inevitable?

@mastodonmigration
https://www.esa.int/Space_Safety/Space_Debris/Space_debris_by_the_numbers
https://www.sdo.esoc.esa.int/environment_report/Space_Environment_Report_latest.pdf
5/n

My origami journey continues not with a more difficult model but with a most beautiful one: Hideo Komatsu’s horse. Folded from one square 30 x 30 cm sheet of double tissue.

#origamiart #origami

In less than 2 weeks, the ESA's JUICE probe will perform a unique double-flyby of Earth & Moon.

People in southeast Asia may be able to see the spacecraft passing overhead, getting a gravitational boost to send it on its way to Jupiter.

https://www.esa.int/Science_Exploration/Space_Science/Juice/Juice_s_lunar-Earth_flyby_all_you_need_to_know #space #science #astronomy #ESA #tech

Here's an old pic I took back in 2019, showing the UT4 telescope at ESO's Paranal Observatory shooting its four mighty lasers. These lasers excite sodium atoms high up in the atmosphere, creating fake "stars" that we monitor in real time to measure and correct atmospheric turbulence, thus yielding very sharp images.

The two faint smudges flanking UT4 are he Andromeda (left) and Triangulum (right) galaxies.

#astrodon #astronomy #astrophotography #science

Matar dos pájaros de un tiro en las lenguas europeas (2017) https://mapasmilhaud.com/mapas-curiosos/matar-dos-pajaros-de-un-tiro-en-las-lenguas-europeas-2017/

It's not new, but this article does a GREAT job of explaining why Artemis is so awful, on every level.

https://idlewords.com/2024/5/the_lunacy_of_artemis.htm

"Early on, SLS designers made the catastrophic decision to reuse Shuttle hardware, which is like using Fabergé eggs to save money on an omelet."

I seriously doubt it will ever deliver someone to the lunar surface.

Si el destino está escrito, me voy a permitir la osadía de cambiarle los papeles de sitio.

Que cuando ese cabrón busque tinta permanente, encuentre lápiz afilado. Rotulador con marca de agua para que no le sea tan fácil perfilar las líneas del desastre.

Se parece a ese señor con sombrero y maletín, cargado de plantillas que manejan las palabras al milímetro, que no espera chocar a la vuelta de la esquina con un corazón que no se cansa de volver a intentar el borrador.

Si el destino está escrito, me voy a permitir la osadía de salirme de la raya, mezclar hasta inventar otro color, pedir cuentas por los mil papeles que rozan la perfección y no tocan ni una sola verdad.

¿Tus ingresos financieros son de menos de mil euros por *día*?

Entonces tiene sentido que firmes la iniciativa europea para un impuesto sobre las grandes fortunas.

No es una campaña común. Una vez alcanzado el quórum, el parlamento europeo debe tratar el tema, sí o sí.

¿Ya pusiste tu firma?

https://eci.ec.europa.eu/038/public/#/screen/home

#TaxTheRich

It's been true for a while now, but it still makes me incredibly sad that there are more Starlink satellites in orbit than measured exoplanets in the universe.

Jupiter's iconic Great Red Spot is only 193 years old!

And it won't last forever. Here's how we know.

https://www.scientificamerican.com/article/how-did-jupiter-get-its-great-red-spot/

Cool news about Omega Centauri!

First, what 𝘪𝘴 Omega Centauri? It's the largest of roughly 200 globular clusters that roam the outskirts of our galaxy. It packs 10 million stars much older than the Sun into a ball 150 light-years in diameter. We think it was a small galaxy in its own right that got captured by ours and stripped of its outer layers.

The news is that Omega Centauri seems to have a black hole in its center, just like many galaxies. But this black hole is just 8,000 times the mass of our Sun!

Yes, that's 𝘩𝘶𝘨𝘦 compared to a black hole formed by a single collapsing star... but it's tiny compared to the typical 'supermassive' black holes found at galactic centers. It's the first black hole in its mass range ever found! Astronomers have been looking for them.

This black hole may be a rare remnant - a fly in amber. Maybe all black holes in galactic centers started small and kept growing by eating stars until they became supermassive. Maybe Omega Centauri stayed small because its host galaxy got ripped apart by ours.

Why do we think Omega Centauri has a black hole in it? A team led by Maximilian Häberle at the Max Planck Institute for Astronomy found seven stars in its core moving so fast that they would have shot out of the cluster if there weren't a massive object holding them in.

Häberle has been working at this since 2019, measuring the velocities of 1.4 million stars in Omega Centauri by studying over 500 Hubble images of the cluster. Most of these images had been produced for another purpose: calibrating Hubble’s instruments. But they turned out to be perfect for the job of finding fast-moving stars.

More details:

https://www.mpia.de/news/science/2024-10-omega-cen-imbh

Read astronomy professor @sundogplanets Sam Lawler's first-hand account of her close-encounter with space junk:

https://www.scientificamerican.com/article/spacex-dropped-space-junk-on-my-neighbors-farm-heres-what-happened-next/

#astronomy #spacejunk #kesslersyndrome #scientificamerican #sciam

This is the best way possible to (maybe?) end this epic thread!

Here is the story of the Saskatchewan SpaceX debris fall, written by me, published by Scientific American: https://www.scientificamerican.com/article/spacex-dropped-space-junk-on-my-neighbors-farm-heres-what-happened-next/

Many of you got to see this story unfold in real-time toots, but this is the whole thing, plus some extra science context. Extra special thank you to @NicoleCRust and @laurahelmuth for encouraging me to pitch the story to SciAm! I am so excited to publish in a magazine I read all the time as a kid.