Andrew Jaffe
@defjaf.bsky.social
Astrophysics, cosmology, Bayesian inference, parenthood, politics, rock ’n’ roll, & more. Professor at Imperial College. andrewjaffe.net He/him/his
The Random Universe—coming in November. https://yalebooks.yale.edu/book/9780300250503/the-random-universe/
The Random Universe—coming in November. https://yalebooks.yale.edu/book/9780300250503/the-random-universe/
Apparently I am the subject of an unauthorised biopic.
October 20, 2025 at 11:23 AM
Apparently I am the subject of an unauthorised biopic.
Surprised that Taylor needs to promote her latest with an A4 poster at the Imperial College elevators (lifts).
October 3, 2025 at 5:29 PM
Surprised that Taylor needs to promote her latest with an A4 poster at the Imperial College elevators (lifts).
This seems like a whole mess of bugs. (Trying to update to macOS 26 Tahoe. Perhaps this is telling me it’s a bad idea?…)
> `PASSWORD_ALERT_TITLE_WITH_USERNAME_OSX_REBRAND_SERVICE_ICLOUD`
> `PASSWORD_ALERT_MESSAGE_WITH_USERNAME_OSX_REBRAND`
> `FOL... https://andrewjaffe.net/microblog/2025/09/1062/
> `PASSWORD_ALERT_TITLE_WITH_USERNAME_OSX_REBRAND_SERVICE_ICLOUD`
> `PASSWORD_ALERT_MESSAGE_WITH_USERNAME_OSX_REBRAND`
> `FOL... https://andrewjaffe.net/microblog/2025/09/1062/
September 16, 2025 at 8:08 AM
This seems like a whole mess of bugs. (Trying to update to macOS 26 Tahoe. Perhaps this is telling me it’s a bad idea?…)
> `PASSWORD_ALERT_TITLE_WITH_USERNAME_OSX_REBRAND_SERVICE_ICLOUD`
> `PASSWORD_ALERT_MESSAGE_WITH_USERNAME_OSX_REBRAND`
> `FOL... https://andrewjaffe.net/microblog/2025/09/1062/
> `PASSWORD_ALERT_TITLE_WITH_USERNAME_OSX_REBRAND_SERVICE_ICLOUD`
> `PASSWORD_ALERT_MESSAGE_WITH_USERNAME_OSX_REBRAND`
> `FOL... https://andrewjaffe.net/microblog/2025/09/1062/
Spent the night with the family in the Frassenhütte at the top of an Austrian Alp…
… followed by our trek down the mountain in pouring rain, hail, thunder and lightning (and inappropriate clothing).
… followed by our trek down the mountain in pouring rain, hail, thunder and lightning (and inappropriate clothing).
August 16, 2025 at 12:58 PM
Spent the night with the family in the Frassenhütte at the top of an Austrian Alp…
… followed by our trek down the mountain in pouring rain, hail, thunder and lightning (and inappropriate clothing).
… followed by our trek down the mountain in pouring rain, hail, thunder and lightning (and inappropriate clothing).
Spent the night with the family in the Frassenhütte at the top of an Austrian Alp.
August 16, 2025 at 7:02 AM
Spent the night with the family in the Frassenhütte at the top of an Austrian Alp.
Cornhole is “American pétanque”.
August 6, 2025 at 12:17 PM
Cornhole is “American pétanque”.
Flat tire in the Biesbosch (Holland, near Dordrecht).
June 15, 2025 at 1:08 PM
Flat tire in the Biesbosch (Holland, near Dordrecht).
My morning bicycle commute (Leiden, NL)
June 3, 2025 at 1:34 PM
My morning bicycle commute (Leiden, NL)
May 16, 2025 at 8:29 AM
February 26, 2025 at 10:36 PM
First loaf in six months. (Needs work.)
February 4, 2025 at 4:03 AM
First loaf in six months. (Needs work.)
In DC, on a Capitol tour with my expat family. Easy & appropriate to be cynical about symbols of democracy 5 days before the awful inauguration. But somber & moving, even—or especially—speeches by senate Democrats excoriating Republican tax cuts for the wealthy disguised as populism.
January 16, 2025 at 3:18 AM
In DC, on a Capitol tour with my expat family. Easy & appropriate to be cynical about symbols of democracy 5 days before the awful inauguration. But somber & moving, even—or especially—speeches by senate Democrats excoriating Republican tax cuts for the wealthy disguised as populism.
On the bus from Siem Reap (Cambodia) to Bangkok.
January 2, 2025 at 10:20 AM
On the bus from Siem Reap (Cambodia) to Bangkok.
We were some of the first travellers on the new Ho Chi Minh City metro, open less than a week.
December 29, 2024 at 3:49 AM
We were some of the first travellers on the new Ho Chi Minh City metro, open less than a week.
Overnight train from Da Nang to Ho Chi Minh City.
December 26, 2024 at 9:55 AM
Overnight train from Da Nang to Ho Chi Minh City.
Oops, photo didn’t get attached!
December 26, 2024 at 9:39 AM
Oops, photo didn’t get attached!
Discovering Japan: https://andrewjaffe.net/blog/2024/12/discovering-japan/
December 17, 2024 at 7:21 AM
Discovering Japan: https://andrewjaffe.net/blog/2024/12/discovering-japan/
Fuji-san from my office at the QUP Centre, KEK lab.
December 3, 2024 at 8:11 AM
Fuji-san from my office at the QUP Centre, KEK lab.
Kind of obsessed with our views of Fuji-san.
(Reposted from 29 November to deal with technical issues.)
(Reposted from 29 November to deal with technical issues.)
December 2, 2024 at 7:30 AM
Kind of obsessed with our views of Fuji-san.
(Reposted from 29 November to deal with technical issues.)
(Reposted from 29 November to deal with technical issues.)
More famous views of Mt Fuji — from our apartment building, 90 miles away, morning and evening.
(Reposted from 27 November to deal with technical issues.)
(Reposted from 27 November to deal with technical issues.)
December 2, 2024 at 7:30 AM
More famous views of Mt Fuji — from our apartment building, 90 miles away, morning and evening.
(Reposted from 27 November to deal with technical issues.)
(Reposted from 27 November to deal with technical issues.)