sergiopereiralema.bsky.social
Sergio Pereira
@sergiopereiralema.bsky.social
180 followers 470 following 270 posts
Ciencia, astronomía e análisis de datos. Aprendendo a procesar os datos de Gaia (ESA). Science, astronomy and data analysis. Learning to process data from Gaia (ESA). https://exploregaiadata.com/
exploregaiadata.com
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 23d
Hello, everyone! I have something I'm really excited to share. After tinkering around for a while, I've launched exploregaiadata.com. It's a personal project to learn how to play around with data from ESA's Gaia space mission and perform some relevant analyses

#AstroMethods
Welcome
Are you fascinated by the universe and wonder how its secrets are unravelled? In this blog, I will recount my learning process, where I combine my ...
exploregaiadata.com
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 38m
I hope that this week I can finish the code for analyzing membership in open clusters using three different methods (DBSCAN, HDBSCAN, and GMM). I'll write a post on ExploreGaiaData.com with the conclusions and comparisons with previous studies of M37.
#AstroMethods #Astronomy #Gaia #ESA
Welcome
Are you fascinated by the universe and wonder how its secrets are unravelled? In this blog, I will recount my learning process, where I combine my ...
ExploreGaiaData.com
2
sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 1h
😳😳😳😳 En serio??? Encántame 'a maseira dos porcos', xa facía tempo que non o escoitaba
1
Reposted by Sergio Pereira
lauratdsk.bsky.social
Laura 觉醒 @lauratdsk.bsky.social · 19h
La llamada queda grabada. Y de esa llamada, se hace una película para que nadie olvide…

Hind Rajab, una niña de solo seis años, está en un coche rodeada de edificios derrumbados por las bombas. Es la única superviviente de los ocupante del coche. Su familia está muerta. 👇🏻
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 2d
Qué fermosas palabras de Jane Goodall
kojamf.bsky.social
KOJAMF🤘🖤🤘 @kojamf.bsky.social · 3d
Dr. Jane Goodall filmed an interview with Netflix in March 2025 that she understood would only be released after her death.
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Reposted by Sergio Pereira
kojamf.bsky.social
KOJAMF🤘🖤🤘 @kojamf.bsky.social · 3d
Dr. Jane Goodall filmed an interview with Netflix in March 2025 that she understood would only be released after her death.
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 3d
Today I am finishing reading several papers (some by @emily.space ) on methods of membership analysis in open clusters: DBSCAn, HDBSCAN, GMM... It is a complex problem, and it was the kind of problem I expected to encounter when I started my personal project to learn how to analyze astronomical data
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Reposted by Sergio Pereira
jfirefly.bsky.social
Julio CMC @jfirefly.bsky.social · 5d
Hay interpretaciones, como esta de Sinead O'Connor, que salen de lugares donde muy pocos han estado. Y te queman en las entrañas.
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Reposted by Sergio Pereira
msfespana.bsky.social
Médicos Sin Fronteras España @msfespana.bsky.social · 5d
🔴#GAZA - Última hora:

Esta mañana, un ataque perpetrado por las fuerzas israelíes ha asesinado a nuestro colega Omar Hayek. Omar, de 42 años, es nuestro decimocuarto compañero asesinado en Gaza desde el 7 de octubre de 2023.

Omar falleció de camino a su trabajo en el hospital.
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Reposted by Sergio Pereira
pepechambo.cometografia.es
Pepe Chambó @pepechambo.cometografia.es · 5d
☄️Comets in October
With two peaks‼️ C/2025 A6 Lemmon could become visible to the naked eye 👁️ and C/2025 R2 SWAN with binoculars 👀 while we await the reappearance of C/2025 K1 ATLAS 🔭 and the interstellar 3I ATLAS ✨
All the details here 👇
ℹ️ cometografia.es/cometas-visi...
#astronomy
Cometas visibles en Octubre de 2025 - Cometografía
El cometa C/2025 A6 (Lemmon) alcanzará su máximo brillo y será observable a simple vista entre las magnitudes 3 y 2 desde el hemisferio norte. El cometa C/2025 R2 (SWAN) podrá verse en todo el mundo c...
cometografia.es
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Reposted by Sergio Pereira
xurxomar.bsky.social
Xurxo Mariño @xurxomar.bsky.social · 5d
O vindeiro luns, no Casino de Compostela, José Edelstein e un servidor miraremos ao ceo e conversaremos sobre partículas, planetas e poesía, a propósito dun libro delicioso que estes días comeza a alumar.
Cartel da presentación de 'Trece maneras de mirar el cielo'
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Reposted by Sergio Pereira
drnereide.bsky.social
Nereide @drnereide.bsky.social · 6d
🧵
Question: "If chimps are so much like us, why are they endangered while humans dominate the globe?"

Goodall: "Well, in some ways we're not successful at all. We're destroying our home. That's not a bit successful."

— #JaneGoodall, 3 Apr. 1934 - 1 Oct. 2025

#ForeverInspiring #LegacyOfHope 🧪
The photo features Jane Goodall and infant chimpanzee Flint reach out to touch each other's hands. Flint was the first infant born at Gombe (Tanzania) after Jane arrived. With him, she had a great opportunity to study chimp development. Photo source: https://education.nationalgeographic.org/resource/jane-goodall/
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Reposted by Sergio Pereira
tony873004.bsky.social
Tony Dunn @tony873004.bsky.social · 6d
An #asteroid passed just 300 km above Antarctica earlier today. It was not discovered until hours after close approach.
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Reposted by Sergio Pereira
pepechambo.cometografia.es
Pepe Chambó @pepechambo.cometografia.es · 8d
📸🔭 October promises to be spectacular for comets:
☄️ C/2025 A6 (Lemmon) will reach magnitude 3–2 and be visible to the naked eye in dark skies.
☄️ C/2025 R2 (SWAN) will shine in binoculars, with long ion tails in photos.
We’ll keep following them day by day on these feeds so you don’t miss the show ✨
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Reposted by Sergio Pereira
anxioususer.bsky.social
Juanito Culini ~ @anxioususer.bsky.social · 10d
Hoy una compi hablaba del first de cambidge y le dije que hay un exámen de validez internacional que es gratuito
Asi que nobleza obliga ustedes tambien sepanlo
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www.efset.org
3 37 58
sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 11d
> e ir construíndo unha base de coñecemento para futuras análises máis profundas. Calquera comentario ou crítica son máis que benvidos
sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 11d
Análise de pertenza do cúmulo M37 - I
exploregaiadata.com/gl/2025-09-2...

Nesta segunda entrada comenzo q procesar datos de Gaia DR3 do cúmulo aberto M37. É unha análise moi básica, co obxectivo de aprender máis sobre os datos dispoñibles, os parámetros relevantes para analizar cúmulos abertos >
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 11d
This will be a long path, lot of things still pending to read and learn, but I can't imagine nothing more exciting. Your comments or suggestions are more than welcome.

#Astromethods #Astronomy #Gaia #ESA
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 11d
In this 2nd post I started to process data from Gaia DR3 to generate my first membership analysis, using M37 as an example. I'm using DBSCAN just for start the process, in following days I'll read scientific papers to learn more about membership analysis.

#Astromethods #Astronomy #Gaia #ESA
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 11d
Membership analysis of the M37 cluster - Learning Astronomical Data Analysis exploregaiadata.com/gl/2025-09-2...

#Astromethods #Astronomy #Gaia #ESA
Membership analysis of the M37 cluster
In this second post, I will perform a membership analysis, that is, decide which stars in a region belong to a cluster based on Gaia...
SergioPereiraLema.github.io
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Reposted by Sergio Pereira
edzard.bsky.social
Edzard Ernst @edzard.bsky.social · 11d
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 11d
-1: llamé pidiendo a la operadora que me pusiera con otro número
milacaja.bsky.social
Mila Caja @milacaja.bsky.social · 13d
Un solo punto he sumado… y raspando el 0 😅

¿Y vosotros? 😊
2 1
sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 14d
𝗫𝗮𝗯𝗶𝗲𝗿 𝗣𝗲𝗿𝗲𝘇-𝗖𝗼𝘂𝘁𝗼,da Universidade de Coruña, lidera un equipo con participación internacional na publicación sobre a análise da cinemática do obxecto interestelar 3I/Atlas. O artigo '𝟯𝗜/𝗔𝗧𝗟𝗔𝗦: 𝗜𝗻 𝗦𝗲𝗮𝗿𝗰𝗵 𝗼𝗳 𝘁𝗵𝗲 𝗪𝗶𝘁𝗻𝗲𝘀𝘀𝗲𝘀 𝘁𝗼 𝗜𝘁𝘀 𝗩𝗼𝘆𝗮𝗴𝗲' xa está en Arxiv: arxiv.org/abs/2509.07678
#Astronomy
3I/ATLAS: In Search of the Witnesses to Its Voyage
3I/ATLAS is the third interstellar object discovered to date, following 1I/'Oumuamua and 2I/Borisov. Its unusually high excess velocity and active cometary nature make it a key probe of the Galactic p...
arxiv.org
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 21d
Fai uns meses atopei unha librería de Python realmente boa para facer os teus propios mapas do ceo nocturno: starplot.dev. Impresionante para preparar as noites de observación, e grazas á documentación e os exemplos, moi sinxela de aprender a usar. Moi bó o soporte do seu creador, Steve Berardi.
Starplot
Star charts and maps of the sky in Python
starplot.dev
1
sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 21d
I've found a really good Python library to create your own Sky Maps: starplot.dev. Really amazing to prepare observation nights. And great support of his developer, Steve Berardi.

#AstroMethods
Starplot
Star charts and maps of the sky in Python
starplot.dev
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sergiopereiralema.bsky.social
Sergio Pereira @sergiopereiralema.bsky.social · 23d
Thanks, @emily.space . I'm really excited too ☺️.
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