Hanno Rein
banner
hanno-rein.de
Hanno Rein
@hanno-rein.de
#Astrophysics Professor at the University of #Toronto, Minor Planet 12249, #UTSC, #UofT, developer of the Exoplanet App for #iOS, #pilot, #cycling, #climbing, #running, #Egyptology, #woodworking.
Reposted by Hanno Rein
wasn't jealous of their 100-hour runtime until I saw what "The Naval Ordinance Research Calculator" actually looked like and now I am actually Very Jealous
November 11, 2025 at 5:17 PM
I redid the integration with REBOUND. And it now takes less than a second on my laptop. 😉
Source code: gist.github.com/hannorein/b1...
November 11, 2025 at 5:03 PM
Michael Poon has been the lead on this! Michael constructs a hierarchical Bayesian model that combines all published exoplanet obliquity measurements. He finds that the observed distribution is very different from the obliquities in our own Solar System, hinting at a different formation scenario.
November 7, 2025 at 3:36 PM
Reposted by Hanno Rein
Just noticed that the Budget calls for Canada to join Eurovision. Like we are never going to get the points, guys. Unless we join the Eastern European block.
November 5, 2025 at 1:21 PM
Yes
November 4, 2025 at 2:54 PM
Did it really need three different font sizes?
November 4, 2025 at 12:04 AM
We also do a hands-on MCMC with 24 human walkers who walk up and down a corridor as determined by a dice and the Metropolis Hastings algorithm, and along the way sample from a discrete posterior distribution that I've attach to doors.
November 3, 2025 at 5:46 PM
And now number 3!
November 1, 2025 at 11:09 PM
Number 2!
November 1, 2025 at 10:16 PM
The mom is extremely trap savvy. We’ve been literally trying for years.
October 31, 2025 at 11:58 PM
October 31, 2025 at 11:53 PM
Reposted by Hanno Rein
I wrote a paper https://ui.adsabs.harvard.edu/abs/2022AJ....163...21L/abstract a few years ago with Aaron Boley and @hannorein and our horrifying predictions for light pollution from satellites are matching up perfectly, Lemmon was low in the northwest for this video […]
Original post on mastodon.social
mastodon.social
October 31, 2025 at 7:00 PM
This looks almost exactly like our simulations from 2022:

www.youtube.com/watch?v=3QkB...

If anyone wants to play with the simulations themselves, you can download our free iOS app "Mega Constellations" apps.apple.com/us/app/mega-.... Although by now you might also just step outside and look up 😢
Constellations
YouTube video by Hanno Rein
www.youtube.com
October 31, 2025 at 7:22 PM