Helio Jaques
@heliojaques.bsky.social
Reposted by Helio Jaques
Here's a preview of my next Gaia DR4 article scheduled for January. What could Gaia DR4 tell us about the inner galaxy?
The first image is figure 8 from Kwee 1954, which may be the first map ever published for the inner galaxy.(ui.adsabs.harvard.edu/abs/1954BAN....)
Uses old galactic longitude.
The first image is figure 8 from Kwee 1954, which may be the first map ever published for the inner galaxy.(ui.adsabs.harvard.edu/abs/1954BAN....)
Uses old galactic longitude.
December 22, 2025 at 9:59 AM
Here's a preview of my next Gaia DR4 article scheduled for January. What could Gaia DR4 tell us about the inner galaxy?
The first image is figure 8 from Kwee 1954, which may be the first map ever published for the inner galaxy.(ui.adsabs.harvard.edu/abs/1954BAN....)
Uses old galactic longitude.
The first image is figure 8 from Kwee 1954, which may be the first map ever published for the inner galaxy.(ui.adsabs.harvard.edu/abs/1954BAN....)
Uses old galactic longitude.
Reposted by Helio Jaques
Lançamos hoje o número 28 da Revista Brasileira de Astronomia.
Ele pode ser consultado online gratuitamente através do endereço sab-astro.org.br/wp-content/u...
Aproveitamos para desejar boas festas e um feliz 2026 a todos nossos associados e seguidores!
Ele pode ser consultado online gratuitamente através do endereço sab-astro.org.br/wp-content/u...
Aproveitamos para desejar boas festas e um feliz 2026 a todos nossos associados e seguidores!
December 21, 2025 at 10:57 PM
Lançamos hoje o número 28 da Revista Brasileira de Astronomia.
Ele pode ser consultado online gratuitamente através do endereço sab-astro.org.br/wp-content/u...
Aproveitamos para desejar boas festas e um feliz 2026 a todos nossos associados e seguidores!
Ele pode ser consultado online gratuitamente através do endereço sab-astro.org.br/wp-content/u...
Aproveitamos para desejar boas festas e um feliz 2026 a todos nossos associados e seguidores!
Reposted by Helio Jaques
Hubble images show the formation of two enormous dust clouds caused by collisions between kilometre-sized celestial bodies around the star Fomalhaut. The dust clouds can easily be confused with real planets – an important clue for future observation missions 🔭
www.mpia.de/news/science...
www.mpia.de/news/science...
Destruction of Infant Planets Around Nearby Star
Astronomers have repeatedly observed events near a distant star that mirror processes from the early solar system’s planet-forming era.
www.mpia.de
December 21, 2025 at 11:24 AM
Hubble images show the formation of two enormous dust clouds caused by collisions between kilometre-sized celestial bodies around the star Fomalhaut. The dust clouds can easily be confused with real planets – an important clue for future observation missions 🔭
www.mpia.de/news/science...
www.mpia.de/news/science...
Reposted by Helio Jaques
From Kasper Zoellner: Just when you think exoplanet demographics can’t get any weirder, this thing shows up. A hot Jupiter with a thing for carbon that may have been a star but now lives with a dead one. Confused? Read today’s bite. ⚛️🔭☄🧪
astrobites.org/2025/12/19/a...
astrobites.org/2025/12/19/a...
A Spider’s Strange Catch: The Carbon Atmosphere of a Black Widow Companion
Just when you think exoplanet demographics can’t get any weirder, this thing shows up. A hot Jupiter with a thing for carbon that may have been a star but now lives with a dead one. Confused? Read tod...
astrobites.org
December 21, 2025 at 3:34 AM
From Kasper Zoellner: Just when you think exoplanet demographics can’t get any weirder, this thing shows up. A hot Jupiter with a thing for carbon that may have been a star but now lives with a dead one. Confused? Read today’s bite. ⚛️🔭☄🧪
astrobites.org/2025/12/19/a...
astrobites.org/2025/12/19/a...
Reposted by Helio Jaques
Many English words stem from Latin.
But did you know there are Latin words that ended up in English two times - in two different forms? These are called doublets.
Over the next days, you'll see doublets in French, Spanish, Italian, Portuguese, Romanian, Catalan, Galician, Dutch, and English again.
But did you know there are Latin words that ended up in English two times - in two different forms? These are called doublets.
Over the next days, you'll see doublets in French, Spanish, Italian, Portuguese, Romanian, Catalan, Galician, Dutch, and English again.
December 19, 2025 at 6:39 PM
Many English words stem from Latin.
But did you know there are Latin words that ended up in English two times - in two different forms? These are called doublets.
Over the next days, you'll see doublets in French, Spanish, Italian, Portuguese, Romanian, Catalan, Galician, Dutch, and English again.
But did you know there are Latin words that ended up in English two times - in two different forms? These are called doublets.
Over the next days, you'll see doublets in French, Spanish, Italian, Portuguese, Romanian, Catalan, Galician, Dutch, and English again.
Reposted by Helio Jaques
From Dr. Sebastian Voltmer
@SeVoSpace
www.instagram.com/sebastianvol...
3I/ATLAS with its two tails, captured during its closest approach to Earth. In the distant background, galaxies in the constellation Leo are visible.
@SeVoSpace
www.instagram.com/sebastianvol...
3I/ATLAS with its two tails, captured during its closest approach to Earth. In the distant background, galaxies in the constellation Leo are visible.
December 20, 2025 at 12:41 PM
From Dr. Sebastian Voltmer
@SeVoSpace
www.instagram.com/sebastianvol...
3I/ATLAS with its two tails, captured during its closest approach to Earth. In the distant background, galaxies in the constellation Leo are visible.
@SeVoSpace
www.instagram.com/sebastianvol...
3I/ATLAS with its two tails, captured during its closest approach to Earth. In the distant background, galaxies in the constellation Leo are visible.
Reposted by Helio Jaques
Nice image of our interstellar visitor 3I/ATLAS from Dan Bartlett in California and the comet-ml. Note that the coma is green and there is a blue tail and anti-tail. This is from a 2 hour exposure.
December 15, 2025 at 6:45 PM
Nice image of our interstellar visitor 3I/ATLAS from Dan Bartlett in California and the comet-ml. Note that the coma is green and there is a blue tail and anti-tail. This is from a 2 hour exposure.
Reposted by Helio Jaques
From Sandy Chiu: Cosmic rays don’t always reveal their origins honestly—magnetic fields can create “mirage halos” that look like real gamma-ray sources. New simulations show how a single pulsar can masquerade as three, reshaping how we interpret TeV observations. ⚛️🔭☄🧪
astrobites.org/2025/12/13/o...
astrobites.org/2025/12/13/o...
How One Pulsar Can Look Like Three: Cosmic-Ray Mirage Halos in the Gamma-Ray Sky
Cosmic rays don’t always reveal their origins honestly—magnetic fields can bend their paths and create “mirage halos” that look like real gamma-ray sources. New simulations show how a single pulsar ca...
astrobites.org
December 14, 2025 at 9:54 PM
From Sandy Chiu: Cosmic rays don’t always reveal their origins honestly—magnetic fields can create “mirage halos” that look like real gamma-ray sources. New simulations show how a single pulsar can masquerade as three, reshaping how we interpret TeV observations. ⚛️🔭☄🧪
astrobites.org/2025/12/13/o...
astrobites.org/2025/12/13/o...
Reposted by Helio Jaques
A Diretoria da SAB tem o prazer de anunciar a realização da XLIX Reunião Anual da Sociedade Astronômica Brasileira, que ocorrerá de 25 a 30 de outubro de 2026, no Praiamar Natal Hotel & Convention, em Natal - RN.
Para mais informações, acesse a página do evento:
sab-astro.org.br/eventos/reun...
Para mais informações, acesse a página do evento:
sab-astro.org.br/eventos/reun...
December 14, 2025 at 8:01 PM
A Diretoria da SAB tem o prazer de anunciar a realização da XLIX Reunião Anual da Sociedade Astronômica Brasileira, que ocorrerá de 25 a 30 de outubro de 2026, no Praiamar Natal Hotel & Convention, em Natal - RN.
Para mais informações, acesse a página do evento:
sab-astro.org.br/eventos/reun...
Para mais informações, acesse a página do evento:
sab-astro.org.br/eventos/reun...
Reposted by Helio Jaques
Very interesting to see this. Cartography is not just about science but about shared usage. Looking forward to seeing if any of the "new" OB associations in this paper get used by other researchers.
A new census of OB associations with Gaia!
In this study, we took advantage of my OB stars map to find new OB associations within 1 kpc. The goal was to create a useful reference catalogue for this era, and to trace the star formation and structure of the local Milky Way.
#stellarastro #galactic
In this study, we took advantage of my OB stars map to find new OB associations within 1 kpc. The goal was to create a useful reference catalogue for this era, and to trace the star formation and structure of the local Milky Way.
#stellarastro #galactic
December 11, 2025 at 2:57 PM
Very interesting to see this. Cartography is not just about science but about shared usage. Looking forward to seeing if any of the "new" OB associations in this paper get used by other researchers.
Reposted by Helio Jaques
In the latest of our #UndergradResearch series, discover how to estimate the metallicities of early galaxies using line ratios from JWST with Vidit Bhandari. ⚛️🔭☄🧪
astrobites.org/2025/12/09/u...
astrobites.org/2025/12/09/u...
UR: Data-Driven Analysis of Galactical Evolution
In the latest of our #UndergradResearch series, discover how to estimate the metallicities of early galaxies using line ratios from JWST with Vidit Bhandari.
astrobites.org
December 10, 2025 at 8:42 PM
In the latest of our #UndergradResearch series, discover how to estimate the metallicities of early galaxies using line ratios from JWST with Vidit Bhandari. ⚛️🔭☄🧪
astrobites.org/2025/12/09/u...
astrobites.org/2025/12/09/u...
Reposted by Helio Jaques
Really interesting analysis here on how claims get amplified by our current media environment (and a rebuttal of sorts to those who argue that Avi Loeb's alien spacecraft hype is good because any science engagement is good engagement):
www.cip.uw.edu/2025/12/03/3...
www.cip.uw.edu/2025/12/03/3...
Alien of the gaps: How 3I/ATLAS was turned into a spaceship online
When we reach the frontier of current knowledge, we’re tempted to insert a higher power into the space where answers aren’t yet satisfying for all.
www.cip.uw.edu
December 8, 2025 at 5:38 PM
Really interesting analysis here on how claims get amplified by our current media environment (and a rebuttal of sorts to those who argue that Avi Loeb's alien spacecraft hype is good because any science engagement is good engagement):
www.cip.uw.edu/2025/12/03/3...
www.cip.uw.edu/2025/12/03/3...
Reposted by Helio Jaques
Quick clarification about this image of interstellar comet 3I/ATLAS 👇
The big background is a wide-field deep exposure from ground-based amateur telescopes. The blue inset is a Hubble Space Telescope close-up of the inner coma. Same comet, two very different zoom levels and physical scales.
The big background is a wide-field deep exposure from ground-based amateur telescopes. The blue inset is a Hubble Space Telescope close-up of the inner coma. Same comet, two very different zoom levels and physical scales.
December 6, 2025 at 9:39 PM
Quick clarification about this image of interstellar comet 3I/ATLAS 👇
The big background is a wide-field deep exposure from ground-based amateur telescopes. The blue inset is a Hubble Space Telescope close-up of the inner coma. Same comet, two very different zoom levels and physical scales.
The big background is a wide-field deep exposure from ground-based amateur telescopes. The blue inset is a Hubble Space Telescope close-up of the inner coma. Same comet, two very different zoom levels and physical scales.
Reposted by Helio Jaques
The word ‘law’ is connected with ‘legal’, but etymologically they’re entirely unrelated.
‘Law’ is related to the verbs ‘to lie’ and ‘to lay’. It comes from a Germanic word meaning “things that are laid out”.
‘Legal’ is related to ‘loyal’. Both derive from Latin ‘lēx’ (law).
Zoom in to learn more:
‘Law’ is related to the verbs ‘to lie’ and ‘to lay’. It comes from a Germanic word meaning “things that are laid out”.
‘Legal’ is related to ‘loyal’. Both derive from Latin ‘lēx’ (law).
Zoom in to learn more:
December 5, 2025 at 7:38 PM
The word ‘law’ is connected with ‘legal’, but etymologically they’re entirely unrelated.
‘Law’ is related to the verbs ‘to lie’ and ‘to lay’. It comes from a Germanic word meaning “things that are laid out”.
‘Legal’ is related to ‘loyal’. Both derive from Latin ‘lēx’ (law).
Zoom in to learn more:
‘Law’ is related to the verbs ‘to lie’ and ‘to lay’. It comes from a Germanic word meaning “things that are laid out”.
‘Legal’ is related to ‘loyal’. Both derive from Latin ‘lēx’ (law).
Zoom in to learn more:
Reposted by Helio Jaques
Reposted by Helio Jaques
I borrowed and edited a reading/writing/discussion assignment from @jillianscudder.com for my #Astro101 class on claims of 3I/ATLAS being alien tech... and it went WELL! 🔭🎢
A few years ago when I tried this, it flopped. All the news media was still too deferential to the "Harvard astronomer" (1/n)
A few years ago when I tried this, it flopped. All the news media was still too deferential to the "Harvard astronomer" (1/n)
December 3, 2025 at 6:02 PM
I borrowed and edited a reading/writing/discussion assignment from @jillianscudder.com for my #Astro101 class on claims of 3I/ATLAS being alien tech... and it went WELL! 🔭🎢
A few years ago when I tried this, it flopped. All the news media was still too deferential to the "Harvard astronomer" (1/n)
A few years ago when I tried this, it flopped. All the news media was still too deferential to the "Harvard astronomer" (1/n)
Reposted by Helio Jaques
What’s the most succesful Germanic colour word? It’s the dullest of them all.
The Germanic word *grīs (grey) was borrowed into Romance, becoming ‘gris’ (French, Spanish etc.) and ‘grigio’ (Italian).
English ‘grey/gray’ has a different origin though: it’s related to German ‘grau’.
Click for more:
The Germanic word *grīs (grey) was borrowed into Romance, becoming ‘gris’ (French, Spanish etc.) and ‘grigio’ (Italian).
English ‘grey/gray’ has a different origin though: it’s related to German ‘grau’.
Click for more:
December 3, 2025 at 6:43 PM
What’s the most succesful Germanic colour word? It’s the dullest of them all.
The Germanic word *grīs (grey) was borrowed into Romance, becoming ‘gris’ (French, Spanish etc.) and ‘grigio’ (Italian).
English ‘grey/gray’ has a different origin though: it’s related to German ‘grau’.
Click for more:
The Germanic word *grīs (grey) was borrowed into Romance, becoming ‘gris’ (French, Spanish etc.) and ‘grigio’ (Italian).
English ‘grey/gray’ has a different origin though: it’s related to German ‘grau’.
Click for more:
Reposted by Helio Jaques
From Lindsey Gordon @lcgordon.bsky.social : This Beyond post will go through the basics of numeric simulation jargon with diagrams and examples to help you get moving in astrophysical simulations. ⚛️🔭☄🧪
astrobites.org/2025/12/02/a...
astrobites.org/2025/12/02/a...
[Beyond] Intro to Astrophysical Simulation Jargon
This Beyond post will go through the basics of numeric simulation jargon with diagrams and examples to help you get moving in astrophysical simulations.
astrobites.org
December 3, 2025 at 11:11 PM
From Lindsey Gordon @lcgordon.bsky.social : This Beyond post will go through the basics of numeric simulation jargon with diagrams and examples to help you get moving in astrophysical simulations. ⚛️🔭☄🧪
astrobites.org/2025/12/02/a...
astrobites.org/2025/12/02/a...
Reposted by Helio Jaques
New lecture from my solar system class is online- all about the origin of the moon, and why we think a giant impact is to blame! 🌔
🔭🧪🎢
youtu.be/eNOQvv_90Kc
🔭🧪🎢
youtu.be/eNOQvv_90Kc
Solar System Lecture- the Origin of the Moon
YouTube video by Astronomer here!
youtu.be
December 3, 2025 at 9:55 PM
New lecture from my solar system class is online- all about the origin of the moon, and why we think a giant impact is to blame! 🌔
🔭🧪🎢
youtu.be/eNOQvv_90Kc
🔭🧪🎢
youtu.be/eNOQvv_90Kc
Reposted by Helio Jaques
2,700-Year-Old Total Solar Eclipse Observations Give Insight to Our Ancient Solar System (and to Earth Rotation) www.discovermagazine.com/2-700-year-o...
2,700-Year-Old Total Solar Eclipse Observations Give Insight to Our Ancient Solar System
Learn more about two of the earliest reports of a total solar eclipse and corona, which were recorded in China, and solve several mysteries about our ancient Solar System.
www.discovermagazine.com
December 3, 2025 at 4:56 AM
2,700-Year-Old Total Solar Eclipse Observations Give Insight to Our Ancient Solar System (and to Earth Rotation) www.discovermagazine.com/2-700-year-o...
Reposted by Helio Jaques
I'm best known these days for visualizing Gaia Mission data but I've also tried my hand at visualizing HI velocity data. Here, for example, is a slice of HI4PI. I'd love to see more papers about HI4PI.
December 2, 2025 at 10:05 AM
I'm best known these days for visualizing Gaia Mission data but I've also tried my hand at visualizing HI velocity data. Here, for example, is a slice of HI4PI. I'd love to see more papers about HI4PI.
Reposted by Helio Jaques
Gaia DR4 is expected to be released in December 2026, so today is a good day to start the countdown!
Why is Gaia DR4 going to be so exciting? Here are several reasons.
kevinjardine.dev/blog/post-13/
Why is Gaia DR4 going to be so exciting? Here are several reasons.
kevinjardine.dev/blog/post-13/
Counting down to Gaia DR4
The next data release from the revolutionary star mapping Gaia Mission
kevinjardine.dev
December 1, 2025 at 3:59 PM
Gaia DR4 is expected to be released in December 2026, so today is a good day to start the countdown!
Why is Gaia DR4 going to be so exciting? Here are several reasons.
kevinjardine.dev/blog/post-13/
Why is Gaia DR4 going to be so exciting? Here are several reasons.
kevinjardine.dev/blog/post-13/