Andrew Jaffe
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defjaf.bsky.social
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/
Apparently I am the subject of an unauthorised biopic.
October 20, 2025 at 11:23 AM
I made a thing.
October 9, 2025 at 6:29 PM
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
October 1, 2025 at 4:59 PM
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/
September 16, 2025 at 8:08 AM
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).
August 16, 2025 at 12:58 PM
Spent the night with the family in the Frassenhütte at the top of an Austrian Alp.
August 16, 2025 at 7:02 AM
Cornhole is “American pétanque”.
August 6, 2025 at 12:17 PM
Flat tire in the Biesbosch (Holland, near Dordrecht).
June 15, 2025 at 1:08 PM
My morning bicycle commute (Leiden, NL)
June 3, 2025 at 1:34 PM
Proof!

Coming later this year, but you can pre-order from your favourite small bookseller today.
May 16, 2025 at 8:29 AM
First Parkrun out of the UK.
May 10, 2025 at 6:55 PM
Category error.
April 7, 2025 at 8:00 PM
February 26, 2025 at 10:36 PM
First loaf in six months. (Needs work.)
February 4, 2025 at 4:03 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.
January 16, 2025 at 3:18 AM
On the bus from Siem Reap (Cambodia) to Bangkok.
January 2, 2025 at 10:20 AM
New Year Dawn
January 1, 2025 at 3:27 AM
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
Overnight train from Da Nang to Ho Chi Minh City.
December 26, 2024 at 9:55 AM
Oops, photo didn’t get attached!
December 26, 2024 at 9:39 AM
December 17, 2024 at 7:21 AM
December 3, 2024 at 8:11 AM
Kind of obsessed with our views of Fuji-san.

(Reposted from 29 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.)
December 2, 2024 at 7:30 AM