Alexandre Adler
@bachpropagate.bsky.social
Postdoc at UC Berkeley and LBNL working on @simonsobservatory.org . I might work on the Cosmic Microwave Background, but my puns are never reheated.
Reposted by Alexandre Adler
A reminder that "Alien observations" is an anagram of "Avi Loeb's insane rot"
Avi Loeb's calculations about 3I/ATLAS are 100% wrong because he has never understood that dust in the tail(s) responds to solar radiation pressure. Solar wind shapes the ion tail. But the radiation pressure is about 1000 times larger than the solar wind ram pressure, for particles that feel it.
November 14, 2025 at 5:35 PM
A reminder that "Alien observations" is an anagram of "Avi Loeb's insane rot"
Reposted by Alexandre Adler
Apropos of nothing in particular, two cosmology questions for my followers:
- in the first figure, are the black or blue contours in better agreement with the pink ones?
- in the second figure, are the black or blue contours in better agreement with (w0,wa)=(-1,0)?
🔭🧪☄️
- in the first figure, are the black or blue contours in better agreement with the pink ones?
- in the second figure, are the black or blue contours in better agreement with (w0,wa)=(-1,0)?
🔭🧪☄️
November 14, 2025 at 7:26 PM
Apropos of nothing in particular, two cosmology questions for my followers:
- in the first figure, are the black or blue contours in better agreement with the pink ones?
- in the second figure, are the black or blue contours in better agreement with (w0,wa)=(-1,0)?
🔭🧪☄️
- in the first figure, are the black or blue contours in better agreement with the pink ones?
- in the second figure, are the black or blue contours in better agreement with (w0,wa)=(-1,0)?
🔭🧪☄️
I have a feeling we can wait a long time for reactions from any of the 39 idiots who co-authored a book with Krauss last year about how science was under attack www.simonandschuster.com/books/The-Wa...
November 13, 2025 at 4:50 AM
I have a feeling we can wait a long time for reactions from any of the 39 idiots who co-authored a book with Krauss last year about how science was under attack www.simonandschuster.com/books/The-Wa...
It’s glonzover/We’re so Tom Barrack dichotomy
November 12, 2025 at 9:13 PM
It’s glonzover/We’re so Tom Barrack dichotomy
Today’s forecast: clouds
Tonight’s forecast: rain
Aaaaargh
Tonight’s forecast: rain
Aaaaargh
We have upgraded our geomagnetic forecast today (12 November 2025) to the highest intensity level amid an ongoing solar storm.
Current predictions suggest that the activity will result in potentially the largest solar storm to hit our planet in over two decades.
Current predictions suggest that the activity will result in potentially the largest solar storm to hit our planet in over two decades.
November 12, 2025 at 4:20 PM
Today’s forecast: clouds
Tonight’s forecast: rain
Aaaaargh
Tonight’s forecast: rain
Aaaaargh
Of course tonight is cloudy in the Bay…
November 12, 2025 at 3:46 AM
Of course tonight is cloudy in the Bay…
Reposted by Alexandre Adler
If you live anywhere in the North half of the US I don't think you'll even need to go outside smaller cities to see them. My partner can set them from inside Cedar Rapids! #aurora #northernlights
November 12, 2025 at 1:43 AM
If you live anywhere in the North half of the US I don't think you'll even need to go outside smaller cities to see them. My partner can set them from inside Cedar Rapids! #aurora #northernlights
Reposted by Alexandre Adler
If you’re in North America and have a view to the north or northwest, there’s heavy auroral activity going right now!
November 12, 2025 at 2:06 AM
If you’re in North America and have a view to the north or northwest, there’s heavy auroral activity going right now!
Reposted by Alexandre Adler
I talk about The Random Universe (the book, and the Universe itself) on [Sean Carroll's Mindscape. We cover epistemology, probability, quantum mechanics, cosmology and more. Sean and I were cosmology grad students at the same time, and it was a pleasure and an honour to spend time with him online.
335 | Andrew Jaffe on Models, Probability, and the Universe – Sean Carroll
www.preposterousuniverse.com
November 11, 2025 at 10:54 AM
I talk about The Random Universe (the book, and the Universe itself) on [Sean Carroll's Mindscape. We cover epistemology, probability, quantum mechanics, cosmology and more. Sean and I were cosmology grad students at the same time, and it was a pleasure and an honour to spend time with him online.
Reposted by Alexandre Adler
After generations of family adventures, Sawyer Lee is determined to sink in the couch! The problem is that it will take a regrettable amount of energy for him to escape the mysteries, conspiracies, and gourd-based festivities the whole town throws his way.
us.macmillan.com/books/978037...
us.macmillan.com/books/978037...
November 10, 2025 at 4:32 PM
After generations of family adventures, Sawyer Lee is determined to sink in the couch! The problem is that it will take a regrettable amount of energy for him to escape the mysteries, conspiracies, and gourd-based festivities the whole town throws his way.
us.macmillan.com/books/978037...
us.macmillan.com/books/978037...
Reposted by Alexandre Adler
<condescendingly> it means “the Moines”. It’s French.
November 10, 2025 at 11:14 PM
<condescendingly> it means “the Moines”. It’s French.
The middle class has watched a program on BBC4.
The middle class is university educated, and so are their kids.
The middle class does not take a package holiday when they go abroad.
The middle class’ NRS social grade is B or C1
The middle class is university educated, and so are their kids.
The middle class does not take a package holiday when they go abroad.
The middle class’ NRS social grade is B or C1
Could someone explain to me what is meant when a British person refers to "the middle class" ? Like, in the US, as I hear it, it basically just means a person who makes a certain amount of money, not too far below and not wildly above the median. Seems like a complex concept when UK writers use it?
November 10, 2025 at 10:05 PM
The middle class has watched a program on BBC4.
The middle class is university educated, and so are their kids.
The middle class does not take a package holiday when they go abroad.
The middle class’ NRS social grade is B or C1
The middle class is university educated, and so are their kids.
The middle class does not take a package holiday when they go abroad.
The middle class’ NRS social grade is B or C1
As a grad student, it was extremely surprising meeting James Peebles while he was on his way to pick up his Nobel in 2019. Most of observational cosmology’s research programs can be traced to his ideas. And here he was, that nice Canadian fellow.
Right, enough of James Watson - who's a senior academic you've met who's been an utter delight?
I'll go first: Jocelyn Bell Burnell
I'll go first: Jocelyn Bell Burnell
November 10, 2025 at 3:17 PM
As a grad student, it was extremely surprising meeting James Peebles while he was on his way to pick up his Nobel in 2019. Most of observational cosmology’s research programs can be traced to his ideas. And here he was, that nice Canadian fellow.
You’ve lost another Death Star?
November 9, 2025 at 12:17 AM
You’ve lost another Death Star?
*Pasteur skeets about tartaric acid*
"Wow, that went chiral!" 🧪
"Wow, that went chiral!" 🧪
November 8, 2025 at 9:47 PM
*Pasteur skeets about tartaric acid*
"Wow, that went chiral!" 🧪
"Wow, that went chiral!" 🧪
Reposted by Alexandre Adler
magic goolsball, what do you think of cutting flights right before the holidays?
November 6, 2025 at 6:55 PM
magic goolsball, what do you think of cutting flights right before the holidays?
Reposted by Alexandre Adler
They're tearing Goddard apart for scraps and I'm supposed to write as many proposals as I can to scramble for a fraction of the money NASA has left? Depressing, degrading, and dehumanizing in a time when the future of planetary science can be measured in the number of people it leaves behind.
November 6, 2025 at 9:08 PM
They're tearing Goddard apart for scraps and I'm supposed to write as many proposals as I can to scramble for a fraction of the money NASA has left? Depressing, degrading, and dehumanizing in a time when the future of planetary science can be measured in the number of people it leaves behind.
Reposted by Alexandre Adler
in the #arXiv
The SPHEREx Satellite Mission
by James Bock and co-authors
arxiv.org/abs/2511.02985 #SPHEREx #Cosmology 🧪
The SPHEREx Satellite Mission
by James Bock and co-authors
arxiv.org/abs/2511.02985 #SPHEREx #Cosmology 🧪
November 6, 2025 at 10:57 AM
in the #arXiv
The SPHEREx Satellite Mission
by James Bock and co-authors
arxiv.org/abs/2511.02985 #SPHEREx #Cosmology 🧪
The SPHEREx Satellite Mission
by James Bock and co-authors
arxiv.org/abs/2511.02985 #SPHEREx #Cosmology 🧪
Reposted by Alexandre Adler
It's just bad science, Rami.
Bad science that made it to publication and now is being picked up by sensationalist writers who don't stop to expertly ask, "is this claim true?"
Which is basically how we got to the abysmal state of global scicomm that we have today, and have been enduring for years.
Bad science that made it to publication and now is being picked up by sensationalist writers who don't stop to expertly ask, "is this claim true?"
Which is basically how we got to the abysmal state of global scicomm that we have today, and have been enduring for years.
November 6, 2025 at 7:35 PM
It's just bad science, Rami.
Bad science that made it to publication and now is being picked up by sensationalist writers who don't stop to expertly ask, "is this claim true?"
Which is basically how we got to the abysmal state of global scicomm that we have today, and have been enduring for years.
Bad science that made it to publication and now is being picked up by sensationalist writers who don't stop to expertly ask, "is this claim true?"
Which is basically how we got to the abysmal state of global scicomm that we have today, and have been enduring for years.
"And I looked, and behold a pale horse: and his name that sat on him was Bankruptcy"
BREAKING: OpenAI is requesting US government support to help guarantee financing for the massive investments in AI chips and data centers it needs for expansion, per Bloomberg.
November 6, 2025 at 3:34 PM
"And I looked, and behold a pale horse: and his name that sat on him was Bankruptcy"
New ERC synergy grant: "Red-teaming the H0 tension" 👀
PIs: Verde, Riess, Lesgourgues, Courbin 👀 👀 👀
#Cosmology
PIs: Verde, Riess, Lesgourgues, Courbin 👀 👀 👀
#Cosmology
November 6, 2025 at 3:30 PM
New ERC synergy grant: "Red-teaming the H0 tension" 👀
PIs: Verde, Riess, Lesgourgues, Courbin 👀 👀 👀
#Cosmology
PIs: Verde, Riess, Lesgourgues, Courbin 👀 👀 👀
#Cosmology
Reposted by Alexandre Adler
I wrote this article! 🙂
This is IMO one of the biggest discoveries of the year, but you haven’t heard about it bc of a NASA press release/embargo stuck bc of the shutdown. I however have no such constraint (we’re tracking it in radio but haven’t finished the paper) so got to write about it! 🔭🧪
This is IMO one of the biggest discoveries of the year, but you haven’t heard about it bc of a NASA press release/embargo stuck bc of the shutdown. I however have no such constraint (we’re tracking it in radio but haven’t finished the paper) so got to write about it! 🔭🧪
A cosmic explosion known as GRB 250702B is by far the longest gamma-ray burst astronomers have ever seen—if it’s even one at all
These Cosmic Outbursts Normally Last for Minutes. This One Went on for Hours—And Nobody Knows Why
A cosmic explosion known as GRB 250702B is by far the longest gamma-ray burst astronomers have ever seen—if it’s even one at all
www.scientificamerican.com
November 5, 2025 at 4:35 PM
I wrote this article! 🙂
This is IMO one of the biggest discoveries of the year, but you haven’t heard about it bc of a NASA press release/embargo stuck bc of the shutdown. I however have no such constraint (we’re tracking it in radio but haven’t finished the paper) so got to write about it! 🔭🧪
This is IMO one of the biggest discoveries of the year, but you haven’t heard about it bc of a NASA press release/embargo stuck bc of the shutdown. I however have no such constraint (we’re tracking it in radio but haven’t finished the paper) so got to write about it! 🔭🧪
Reposted by Alexandre Adler
mine eyes? seeing the glory.
the vintage where the grapes of wrath are stored? trampled.
the faithful lighting of his terrible swift sword? buddy, you better believe that's loosed.
the vintage where the grapes of wrath are stored? trampled.
the faithful lighting of his terrible swift sword? buddy, you better believe that's loosed.
November 5, 2025 at 1:43 AM
mine eyes? seeing the glory.
the vintage where the grapes of wrath are stored? trampled.
the faithful lighting of his terrible swift sword? buddy, you better believe that's loosed.
the vintage where the grapes of wrath are stored? trampled.
the faithful lighting of his terrible swift sword? buddy, you better believe that's loosed.
Reposted by Alexandre Adler
First official flight of the 2025-2026 Austral summer season arrived last Tuesday (Oct-28). Here is a pic from SPT winterover Sim Bash of the arriving crew. Right now we have five SPT'ers in McMurdo hoping to fly to Pole in the next couple days! #Antarctica #southpole
November 3, 2025 at 8:29 PM
First official flight of the 2025-2026 Austral summer season arrived last Tuesday (Oct-28). Here is a pic from SPT winterover Sim Bash of the arriving crew. Right now we have five SPT'ers in McMurdo hoping to fly to Pole in the next couple days! #Antarctica #southpole