Reposted by Ruari Mackenzie
Remember that lovely aurora last week?
Well...um...this is what Euclid saw... 😱
🧵
Well...um...this is what Euclid saw... 😱
🧵
November 19, 2025 at 11:51 AM
Remember that lovely aurora last week?
Well...um...this is what Euclid saw... 😱
🧵
Well...um...this is what Euclid saw... 😱
🧵
Reposted by Ruari Mackenzie
For more details on the transients being plate flaws, see Hambly & Blair.
"...the putative transients are likely to be spurious artefacts of the photographic emulsion. We suggest a possible cause of the appearance of these images as resulting from the copying..."
academic.oup.com/rasti/articl...
"...the putative transients are likely to be spurious artefacts of the photographic emulsion. We suggest a possible cause of the appearance of these images as resulting from the copying..."
academic.oup.com/rasti/articl...
On the nature of apparent transient sources on the National Geographic Society–Palomar Observatory Sky Survey glass copy plates
Abstract. We examine critically recent claims for the presence of above-atmosphere optical transients in publicly available digitized scans of Schmidt tele
academic.oup.com
October 23, 2025 at 11:14 PM
For more details on the transients being plate flaws, see Hambly & Blair.
"...the putative transients are likely to be spurious artefacts of the photographic emulsion. We suggest a possible cause of the appearance of these images as resulting from the copying..."
academic.oup.com/rasti/articl...
"...the putative transients are likely to be spurious artefacts of the photographic emulsion. We suggest a possible cause of the appearance of these images as resulting from the copying..."
academic.oup.com/rasti/articl...
Reposted by Ruari Mackenzie
Updated plot — now with <<Peeples>> Time 😅
October 15, 2025 at 11:55 PM
Updated plot — now with <<Peeples>> Time 😅
Reposted by Ruari Mackenzie
The JWST Cycle 5 "Procrastination Monitor", i.e. Molly's proposal counter submission form, is up an running. Please fill it out if you have data to add to it. And do share! #JWSTCycle5
docs.google.com/forms/d/e/1F...
docs.google.com/forms/d/e/1F...
JWST Cycle 5 Proposal Procrastination Monitor
An anonymous way to monitor JWST proposal submission times
In the email from proposal-submission@stsci, the subject line will be like, "JWST Phase I Proposal 3434 submission 4 received". Here, 3434 =...
docs.google.com
October 14, 2025 at 3:27 PM
The JWST Cycle 5 "Procrastination Monitor", i.e. Molly's proposal counter submission form, is up an running. Please fill it out if you have data to add to it. And do share! #JWSTCycle5
docs.google.com/forms/d/e/1F...
docs.google.com/forms/d/e/1F...
Reposted by Ruari Mackenzie
Spot a logo that gives off superhero vibes? 😉
Meet "Fantastic 4MOST", which will soon join our league of extraordinary instruments.
@4most-eu.bsky.social comes packed with superpowers. Discover them: www.eso.org/public/image...
📷 ESO/4MOST/Steffen Frey
🔭 🧪 #instrumentation
Meet "Fantastic 4MOST", which will soon join our league of extraordinary instruments.
@4most-eu.bsky.social comes packed with superpowers. Discover them: www.eso.org/public/image...
📷 ESO/4MOST/Steffen Frey
🔭 🧪 #instrumentation
July 22, 2025 at 7:45 AM
Spot a logo that gives off superhero vibes? 😉
Meet "Fantastic 4MOST", which will soon join our league of extraordinary instruments.
@4most-eu.bsky.social comes packed with superpowers. Discover them: www.eso.org/public/image...
📷 ESO/4MOST/Steffen Frey
🔭 🧪 #instrumentation
Meet "Fantastic 4MOST", which will soon join our league of extraordinary instruments.
@4most-eu.bsky.social comes packed with superpowers. Discover them: www.eso.org/public/image...
📷 ESO/4MOST/Steffen Frey
🔭 🧪 #instrumentation
Reposted by Ruari Mackenzie
It seems the Spanish government is willing to put 400M€ to convince the US to bring the TMT to the Roque de los Muchachos Observatory (La Palma). Would that be enough to convince the project to come here int he current climate? 🔭
elpais.com/ciencia/2025...
elpais.com/ciencia/2025...
El Gobierno promete 400 millones de euros para traer a España el Telescopio de Treinta Metros que Trump quiere cancelar
El Ministerio de Ciencia impulsa la construcción del mayor observatorio del hemisferio norte en la isla de La Palma en lugar de Hawái
elpais.com
July 23, 2025 at 6:56 PM
It seems the Spanish government is willing to put 400M€ to convince the US to bring the TMT to the Roque de los Muchachos Observatory (La Palma). Would that be enough to convince the project to come here int he current climate? 🔭
elpais.com/ciencia/2025...
elpais.com/ciencia/2025...
Reposted by Ruari Mackenzie
A wee thread on a paper I think has big holes and some suggestions for grad students out there looking for a fun calculation... (Technical) 🔭 🧪 #cosmology It's this one; it claims at least 1% of the photons in the CMB are actually generated in early-forming galaxies. 1/N arxiv.org/abs/2505.04687
The Impact of Early Massive Galaxy Formation on the Cosmic Microwave Background
The Cosmic Microwave Background (CMB) anisotropies, corrected for foreground effects, form the foundation of cosmology and support the Big Bang model. A previously overlooked foreground component is t...
arxiv.org
June 25, 2025 at 1:02 AM
A wee thread on a paper I think has big holes and some suggestions for grad students out there looking for a fun calculation... (Technical) 🔭 🧪 #cosmology It's this one; it claims at least 1% of the photons in the CMB are actually generated in early-forming galaxies. 1/N arxiv.org/abs/2505.04687
Reposted by Ruari Mackenzie
Breaking space news: We have made our own solar eclipse in space! 🌘
Today, we release the first images from our Proba-3 mission, which flies two spacecraft in precise formation to create artificial solar eclipses in orbit.
Learn more ➡️ www.esa.int/Enabling_Sup...
Today, we release the first images from our Proba-3 mission, which flies two spacecraft in precise formation to create artificial solar eclipses in orbit.
Learn more ➡️ www.esa.int/Enabling_Sup...
June 16, 2025 at 2:30 PM
Breaking space news: We have made our own solar eclipse in space! 🌘
Today, we release the first images from our Proba-3 mission, which flies two spacecraft in precise formation to create artificial solar eclipses in orbit.
Learn more ➡️ www.esa.int/Enabling_Sup...
Today, we release the first images from our Proba-3 mission, which flies two spacecraft in precise formation to create artificial solar eclipses in orbit.
Learn more ➡️ www.esa.int/Enabling_Sup...
Reposted by Ruari Mackenzie
Looking forward to JWST Cycle 5? Our latest video tutorial shows how to use the Rogue Path Tool to predict and avoid the dreaded "claws" in NIRCam observations.
🔭
🔭
NIRCam Rogue Path Planning Tool for Avoiding "Claws” Artifacts
YouTube video by JWST Observer
youtu.be
May 28, 2025 at 4:27 PM
Looking forward to JWST Cycle 5? Our latest video tutorial shows how to use the Rogue Path Tool to predict and avoid the dreaded "claws" in NIRCam observations.
🔭
🔭
Reposted by Ruari Mackenzie
First the rumour was a 20% budget cut. Then, 50%. Now the president's NASA budget is out and it's a 68% cut to astrophysics ($1.5B to $487M).
Even if this gets reversed in four years, we will *never* recover the missions, partners, people who will be gone.
www.washingtonpost.com/science/2025...
Even if this gets reversed in four years, we will *never* recover the missions, partners, people who will be gone.
www.washingtonpost.com/science/2025...
Massive cuts to NASA science proposed in early White House budget plan
The preliminary version of President Donald Trump’s budget proposal to Congress, known as a “passback,” would cut the agency’s science budget funding nearly in half.
www.washingtonpost.com
April 11, 2025 at 2:54 PM
First the rumour was a 20% budget cut. Then, 50%. Now the president's NASA budget is out and it's a 68% cut to astrophysics ($1.5B to $487M).
Even if this gets reversed in four years, we will *never* recover the missions, partners, people who will be gone.
www.washingtonpost.com/science/2025...
Even if this gets reversed in four years, we will *never* recover the missions, partners, people who will be gone.
www.washingtonpost.com/science/2025...
Reposted by Ruari Mackenzie
Here's an infrared Sombrero from J-Dub. Not new, just my own view on it. Part of a project to eventually combine imagery from various sources.
flic.kr/p/2qNgBrh
flic.kr/p/2qNgBrh
February 23, 2025 at 4:29 AM
Here's an infrared Sombrero from J-Dub. Not new, just my own view on it. Part of a project to eventually combine imagery from various sources.
flic.kr/p/2qNgBrh
flic.kr/p/2qNgBrh
Reposted by Ruari Mackenzie
Energy megaproject in Chile threatens the world’s largest telescopes
Glare from proposed green hydrogen plant could degrade views of distant universe.
www.science.org/content/arti... 🔭🧪
Glare from proposed green hydrogen plant could degrade views of distant universe.
www.science.org/content/arti... 🔭🧪
Energy megaproject in Chile threatens the world’s largest telescopes
Glare from proposed green hydrogen plant could degrade views of distant universe
www.science.org
January 13, 2025 at 11:21 AM
Energy megaproject in Chile threatens the world’s largest telescopes
Glare from proposed green hydrogen plant could degrade views of distant universe.
www.science.org/content/arti... 🔭🧪
Glare from proposed green hydrogen plant could degrade views of distant universe.
www.science.org/content/arti... 🔭🧪
So long, and thanks for all the FITS.
The amazing @esa.int Gaia telescope is taking its last measurements today
Gaia has had a tremendous impact on astronomy. Without the easy to access (and use) data releases, a lot of the work I do would be impossible
Thank you, Gaia and team! Can't wait for the future data releases! 🔭🧪
Gaia has had a tremendous impact on astronomy. Without the easy to access (and use) data releases, a lot of the work I do would be impossible
Thank you, Gaia and team! Can't wait for the future data releases! 🔭🧪
January 15, 2025 at 5:46 PM
So long, and thanks for all the FITS.
Reposted by Ruari Mackenzie
JWST peers deep into space, taking a snapshot of over 20,000 galaxies, some whose light comes to us from over 12 billion light-years away.
This image was presented today on AAS Nova.
aasnova.org/2025/01/08/f...
🔭 🧪
This image was presented today on AAS Nova.
aasnova.org/2025/01/08/f...
🔭 🧪
January 8, 2025 at 7:41 PM
JWST peers deep into space, taking a snapshot of over 20,000 galaxies, some whose light comes to us from over 12 billion light-years away.
This image was presented today on AAS Nova.
aasnova.org/2025/01/08/f...
🔭 🧪
This image was presented today on AAS Nova.
aasnova.org/2025/01/08/f...
🔭 🧪
Reposted by Ruari Mackenzie
Yesterday was paper day!
With deep JWST data from the ALT survey we provide new independent evidence that the new population of faint AGNs in the early Universe seems to have so-called overly massive black holes compared to their stellar mass
arxiv.org/abs/2412.02846
With deep JWST data from the ALT survey we provide new independent evidence that the new population of faint AGNs in the early Universe seems to have so-called overly massive black holes compared to their stellar mass
arxiv.org/abs/2412.02846
December 6, 2024 at 2:33 PM
Yesterday was paper day!
With deep JWST data from the ALT survey we provide new independent evidence that the new population of faint AGNs in the early Universe seems to have so-called overly massive black holes compared to their stellar mass
arxiv.org/abs/2412.02846
With deep JWST data from the ALT survey we provide new independent evidence that the new population of faint AGNs in the early Universe seems to have so-called overly massive black holes compared to their stellar mass
arxiv.org/abs/2412.02846
Reposted by Ruari Mackenzie
Euclid, ESA's dark universe explorer, delivered a new set of pictures. They demonstrate the stunning data quality at all levels, from wide-angle views of the Universe to the details of structures of individual galaxies. This is what the German consortium members say.
🔭
www.mpia.de/news/2024-eu...
🔭
www.mpia.de/news/2024-eu...
Zoom into the first page of Euclid’s great cosmic atlas
Euclid reveals the first deep view into the cosmos, spanning an area of 500 full moons in the sky.
www.mpia.de
October 15, 2024 at 4:27 PM
Euclid, ESA's dark universe explorer, delivered a new set of pictures. They demonstrate the stunning data quality at all levels, from wide-angle views of the Universe to the details of structures of individual galaxies. This is what the German consortium members say.
🔭
www.mpia.de/news/2024-eu...
🔭
www.mpia.de/news/2024-eu...