Cristóbal Sifón
@csifon.bsky.social
Astrophysicist. Dark matter, galaxies and clusters through optical/submm/other wavelengths.
The semester. is. over.
a dog is walking on a wooden floor with a dogcore logo on the back
ALT: a dog is walking on a wooden floor with a dogcore logo on the back
media.tenor.com
December 12, 2025 at 3:04 PM
The semester. is. over.
Reposted by Cristóbal Sifón
For comparison, every robotic mission NASA has ever sent in its history, from the dawn of the Space Age 65 years ago to today, from Mercury to Pluto and beyond, has cost less than $40B.
I know which one has done more for humankind and which one should be dismantled.
I know which one has done more for humankind and which one should be dismantled.
Mark Zuckerberg’s gamble on the ‘Metaverse’ has cost Meta more than $77B
The company now plans to cut spending on it and shift focus to AI wearables instead
(via WSJ)
The company now plans to cut spending on it and shift focus to AI wearables instead
(via WSJ)
December 7, 2025 at 2:03 AM
For comparison, every robotic mission NASA has ever sent in its history, from the dawn of the Space Age 65 years ago to today, from Mercury to Pluto and beyond, has cost less than $40B.
I know which one has done more for humankind and which one should be dismantled.
I know which one has done more for humankind and which one should be dismantled.
Reposted by Cristóbal Sifón
i’m not crying you’re crying
xkcd: Fifteen Years
xkcd: Fifteen Years
Fifteen Years
xkcd.com
November 25, 2025 at 1:58 AM
i’m not crying you’re crying
xkcd: Fifteen Years
xkcd: Fifteen Years
Oh-oh not again
A Washington resident has been hospitalized with bird flu, according to the Washington State Health Department, and they’re infected with a strain of the virus that hasn’t been seen in humans before. https://cnn.it/4oIRswI
November 15, 2025 at 3:43 AM
Oh-oh not again
There's no falling below going from "Trump has nothing to do with this pedophile" to "He was not the *bad* kind of pedophile, you know?" and expecting people to go "oh, ok"
[Narrator in a few months: Yes, there was...]
[Narrator in a few months: Yes, there was...]
Megyn Kelly: "I know somebody very close to this case…Jeffrey Epstein, in this person's view, was not a pedophile…He was into the barely legal type, like he liked 15 year old girls…He wasn't into like 8 year olds…There's a difference between a 15 year old and a 5 year old."
November 13, 2025 at 11:59 PM
There's no falling below going from "Trump has nothing to do with this pedophile" to "He was not the *bad* kind of pedophile, you know?" and expecting people to go "oh, ok"
[Narrator in a few months: Yes, there was...]
[Narrator in a few months: Yes, there was...]
Reposted by Cristóbal Sifón
A Sharon Begley byline, almost 5 years after her death.
Upon hearing the news James Watson had died, a STAT reporter said in our Slack, "I wish I could read what Sharon would have written."
Incredible news: Sharon in fact did pre-write a Watson obit. And it is masterful and excoriating.
🧪🧬🧫
Upon hearing the news James Watson had died, a STAT reporter said in our Slack, "I wish I could read what Sharon would have written."
Incredible news: Sharon in fact did pre-write a Watson obit. And it is masterful and excoriating.
🧪🧬🧫
James Watson, dead at 97, was a scientific legend and a pariah among his peers
James Watson, the co-discoverer of the structure of DNA who died Thursday at 97, was a scientific legend and a pariah among his peers.
www.statnews.com
November 8, 2025 at 1:39 PM
A Sharon Begley byline, almost 5 years after her death.
Upon hearing the news James Watson had died, a STAT reporter said in our Slack, "I wish I could read what Sharon would have written."
Incredible news: Sharon in fact did pre-write a Watson obit. And it is masterful and excoriating.
🧪🧬🧫
Upon hearing the news James Watson had died, a STAT reporter said in our Slack, "I wish I could read what Sharon would have written."
Incredible news: Sharon in fact did pre-write a Watson obit. And it is masterful and excoriating.
🧪🧬🧫
Reposted by Cristóbal Sifón
October 31, 2025 at 4:52 AM
Excelente experiencia la exhibivión de Van Gogh en el Mall Marina en Viña, hasta los niños se entretuvieron con la historia inmersiva y el recorrido de realidad virtual ⭐⭐⭐⭐⭐
September 28, 2025 at 10:20 PM
Excelente experiencia la exhibivión de Van Gogh en el Mall Marina en Viña, hasta los niños se entretuvieron con la historia inmersiva y el recorrido de realidad virtual ⭐⭐⭐⭐⭐
Reposted by Cristóbal Sifón
It’s hard to get someone to understand something when their salary depends on NOT understanding it.
Well, the Republican Party depends on fossil fuel money.
Well, the Republican Party depends on fossil fuel money.
September 14, 2025 at 2:09 AM
It’s hard to get someone to understand something when their salary depends on NOT understanding it.
Well, the Republican Party depends on fossil fuel money.
Well, the Republican Party depends on fossil fuel money.
Melt Pizzas comprando comentarios positivos
July 30, 2025 at 2:44 PM
Melt Pizzas comprando comentarios positivos
Por enésima vez, astrónomo de Harvard: No hay evidencia de tecnologías extraterrestres y 3I/ATLAS no es tecnología avanzada. Estos sinsentidos generan un daño enorme: falsas expectativas y menor credibilidad. Avi Loeb solo daña al público y la comunidad astronómica
www.instagram.com/reel/DMdr1A5...
www.instagram.com/reel/DMdr1A5...
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www.instagram.com
July 24, 2025 at 12:43 PM
Por enésima vez, astrónomo de Harvard: No hay evidencia de tecnologías extraterrestres y 3I/ATLAS no es tecnología avanzada. Estos sinsentidos generan un daño enorme: falsas expectativas y menor credibilidad. Avi Loeb solo daña al público y la comunidad astronómica
www.instagram.com/reel/DMdr1A5...
www.instagram.com/reel/DMdr1A5...
Reposted by Cristóbal Sifón
Journey with us to the star that exploded twice! 🚀
The remains of supernova SNR 0509-67.5 are all that is left of this star. Our VLT found out that it suffered a pair of explosive blasts, shedding new light on some of the most important explosions in the Universe.
www.eso.org/public/news/...
🔭 🧪
The remains of supernova SNR 0509-67.5 are all that is left of this star. Our VLT found out that it suffered a pair of explosive blasts, shedding new light on some of the most important explosions in the Universe.
www.eso.org/public/news/...
🔭 🧪
July 7, 2025 at 8:06 AM
Journey with us to the star that exploded twice! 🚀
The remains of supernova SNR 0509-67.5 are all that is left of this star. Our VLT found out that it suffered a pair of explosive blasts, shedding new light on some of the most important explosions in the Universe.
www.eso.org/public/news/...
🔭 🧪
The remains of supernova SNR 0509-67.5 are all that is left of this star. Our VLT found out that it suffered a pair of explosive blasts, shedding new light on some of the most important explosions in the Universe.
www.eso.org/public/news/...
🔭 🧪
Las primeras imágenes tomadas con la cámara más grande del mundo, LSSTCam, por el Observatorio Vera C. Rubin @vrubinobs.bsky.social, ya están disponibles y son una maravilla!
planetariochile.cl/el-observato...
planetariochile.cl/el-observato...
El Observatorio Vera C. Rubin y su cámara digital, la más grande del mundo, revelan desde Chile sus primeras imágenes del Universo – Planetario Chile
planetariochile.cl
June 23, 2025 at 2:20 PM
Las primeras imágenes tomadas con la cámara más grande del mundo, LSSTCam, por el Observatorio Vera C. Rubin @vrubinobs.bsky.social, ya están disponibles y son una maravilla!
planetariochile.cl/el-observato...
planetariochile.cl/el-observato...
June 20, 2025 at 2:02 AM
Otro ejemplo más de "no necesita robar porque tiene plata". En otras noticias, el agua moja.
Quién es el gerente de Metro que ganaba más de $14 millones y que renunció por viajar con licencia médica
Quién es el gerente de Metro que ganaba más de $14 millones y que renunció por viajar con licencia médica | The Clinic
Patricio Baronti era el tercer gerente de Metro con mayor remuneración por detrás del gerente general y el gerente corporativo de Ingeniería.
www.theclinic.cl
May 29, 2025 at 12:05 AM
Otro ejemplo más de "no necesita robar porque tiene plata". En otras noticias, el agua moja.
Reposted by Cristóbal Sifón
Mi columna en Emol sobre el cumpleaños 60 del Fondo Cósmico de Microondas y el rol central que ha tenido y seguirá teniendo Chile en la exploración del origen y la evolución del Universo #astronomia
comentarista.emol.com/2578227/3332...
comentarista.emol.com/2578227/3332...
Columna de Astronomía | 60 años del Fondo Cósmico de Microondas
En 6 días más se cumplen 60 años de la publicación de uno de los descubrim
comentarista.emol.com
May 11, 2025 at 4:17 PM
Mi columna en Emol sobre el cumpleaños 60 del Fondo Cósmico de Microondas y el rol central que ha tenido y seguirá teniendo Chile en la exploración del origen y la evolución del Universo #astronomia
comentarista.emol.com/2578227/3332...
comentarista.emol.com/2578227/3332...
Reposted by Cristóbal Sifón
Hoy se cumplen 60 años de la publicación del descubrimiento del Fondo Cósmico de Microondas por Arno Penzias y Robert Wilson! 🥳
Compartimos la columna de nuestro investigador @csifon.bsky.social resumiendo la importancia de este descubrimiento
Compartimos la columna de nuestro investigador @csifon.bsky.social resumiendo la importancia de este descubrimiento
Mi columna en Emol sobre el cumpleaños 60 del Fondo Cósmico de Microondas y el rol central que ha tenido y seguirá teniendo Chile en la exploración del origen y la evolución del Universo #astronomia
comentarista.emol.com/2578227/3332...
comentarista.emol.com/2578227/3332...
Columna de Astronomía | 60 años del Fondo Cósmico de Microondas
En 6 días más se cumplen 60 años de la publicación de uno de los descubrim
comentarista.emol.com
May 13, 2025 at 1:36 PM
Hoy se cumplen 60 años de la publicación del descubrimiento del Fondo Cósmico de Microondas por Arno Penzias y Robert Wilson! 🥳
Compartimos la columna de nuestro investigador @csifon.bsky.social resumiendo la importancia de este descubrimiento
Compartimos la columna de nuestro investigador @csifon.bsky.social resumiendo la importancia de este descubrimiento
Mi columna en Emol sobre el cumpleaños 60 del Fondo Cósmico de Microondas y el rol central que ha tenido y seguirá teniendo Chile en la exploración del origen y la evolución del Universo #astronomia
comentarista.emol.com/2578227/3332...
comentarista.emol.com/2578227/3332...
Columna de Astronomía | 60 años del Fondo Cósmico de Microondas
En 6 días más se cumplen 60 años de la publicación de uno de los descubrim
comentarista.emol.com
May 11, 2025 at 4:17 PM
Mi columna en Emol sobre el cumpleaños 60 del Fondo Cósmico de Microondas y el rol central que ha tenido y seguirá teniendo Chile en la exploración del origen y la evolución del Universo #astronomia
comentarista.emol.com/2578227/3332...
comentarista.emol.com/2578227/3332...
Reposted by Cristóbal Sifón
Saturday Morning Breakfast Cereal (SMBC) is a daily ongoing webcomic about science, people, the universe, and the weird stuff they generate.
◆ COMIC ◆ www.smbc-comics.com
◆ PATREON ◆ www.patreon.com/c/ZachWeiner...
◆ STORE ◆ smbc-store.myshopify.com
◆ INSTA ◆ www.instagram.com/smbccomics
◆ COMIC ◆ www.smbc-comics.com
◆ PATREON ◆ www.patreon.com/c/ZachWeiner...
◆ STORE ◆ smbc-store.myshopify.com
◆ INSTA ◆ www.instagram.com/smbccomics
April 30, 2025 at 10:08 PM
Saturday Morning Breakfast Cereal (SMBC) is a daily ongoing webcomic about science, people, the universe, and the weird stuff they generate.
◆ COMIC ◆ www.smbc-comics.com
◆ PATREON ◆ www.patreon.com/c/ZachWeiner...
◆ STORE ◆ smbc-store.myshopify.com
◆ INSTA ◆ www.instagram.com/smbccomics
◆ COMIC ◆ www.smbc-comics.com
◆ PATREON ◆ www.patreon.com/c/ZachWeiner...
◆ STORE ◆ smbc-store.myshopify.com
◆ INSTA ◆ www.instagram.com/smbccomics
Reposted by Cristóbal Sifón
Our our @science.esa.int Research Fellow Louise Breuval wrote a fantastic astro/history paper performing a re-analysis of Henrietta Leavitt's work on the Cepheid period-luminosity relation, with the exact same stars but modern data & methods. arxiv.org/abs/2502.17438 🔭
The Legacy of Henrietta Leavitt: A Re-analysis of the First Cepheid Period-Luminosity Relation
Henrietta Swan Leavitt's discovery of the relationship between the period and luminosity (hereafter the Leavitt Law) of 25 variable stars in the Small Magellanic Cloud, published in 1912, revolutioniz...
ui.adsabs.harvard.edu
April 29, 2025 at 3:37 PM
Our our @science.esa.int Research Fellow Louise Breuval wrote a fantastic astro/history paper performing a re-analysis of Henrietta Leavitt's work on the Cepheid period-luminosity relation, with the exact same stars but modern data & methods. arxiv.org/abs/2502.17438 🔭
Cuánto tiempo que no veía un partido tan bueno, vamos #LosCruzados!
Me trajo recuerdos de un cierto 5-0 a Everton el 2010...
Me trajo recuerdos de un cierto 5-0 a Everton el 2010...
April 26, 2025 at 5:06 AM
Cuánto tiempo que no veía un partido tan bueno, vamos #LosCruzados!
Me trajo recuerdos de un cierto 5-0 a Everton el 2010...
Me trajo recuerdos de un cierto 5-0 a Everton el 2010...
¡En menos de 1 hora y 20 minutos la sonda Lucy tendrá su máximo acercamiento al asteroide 52246 Donaldjohanson! Pueden seguirlo, incluidas imágenes en tiempo real, en whereislucy.space (click en "to encounter mode")
April 20, 2025 at 4:37 PM
¡En menos de 1 hora y 20 minutos la sonda Lucy tendrá su máximo acercamiento al asteroide 52246 Donaldjohanson! Pueden seguirlo, incluidas imágenes en tiempo real, en whereislucy.space (click en "to encounter mode")
'Confirmed' is such a funny word
Astronomers using the James Webb Space Telescope confirmed the planet K2-18b has traces of dimethyl sulfide, a potential biosignature of marine microorganisms. www.wired.com/story/scient...
Scientists Find Promising Indication of Extraterrestrial Life—124 Light-Years Away
Astronomers using the James Webb Space Telescope confirmed the planet K2-18b has traces of dimethyl sulfide, a potential biosignature of marine microorganisms.
www.wired.com
April 19, 2025 at 1:16 PM
'Confirmed' is such a funny word
Reposted by Cristóbal Sifón
17 years after the project started, the Atacama Cosmology Telescope team is publishing its final major data release, and it’s a big one. Read more: www.simonsfoundation.org/2025/03/18/a... #science #astronomy
Atacama Cosmology Telescope Publishes Final Major Data Release
Atacama Cosmology Telescope Publishes Final Major Data Release on Simons Foundation
www.simonsfoundation.org
March 31, 2025 at 2:30 PM
17 years after the project started, the Atacama Cosmology Telescope team is publishing its final major data release, and it’s a big one. Read more: www.simonsfoundation.org/2025/03/18/a... #science #astronomy