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
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
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
💫 @philip-armitage.bsky.social shared a paper from 1965 which first showed numerically that Neptune and Pluto are in a 3:2 resonance. This integration took 100 hours on the Naval Ordinance Research Calculator.
Original paper: ui.adsabs.harvard.edu/abs/1965AJ.....
Original paper: ui.adsabs.harvard.edu/abs/1965AJ.....
November 11, 2025 at 5:03 PM
💫 @philip-armitage.bsky.social shared a paper from 1965 which first showed numerically that Neptune and Pluto are in a 3:2 resonance. This integration took 100 hours on the Naval Ordinance Research Calculator.
Original paper: ui.adsabs.harvard.edu/abs/1965AJ.....
Original paper: ui.adsabs.harvard.edu/abs/1965AJ.....
🎉💫 We had another paper accepted last week. Garett Brown was the lead on this one. We study the effect of a substellar flyby on the Solar System and find that there is a surprisingly high probability that such a flyby could have played an important role in shaping the system's architecture.
November 10, 2025 at 2:27 PM
🎉💫 We had another paper accepted last week. Garett Brown was the lead on this one. We study the effect of a substellar flyby on the Solar System and find that there is a surprisingly high probability that such a flyby could have played an important role in shaping the system's architecture.
Reposted by Hanno Rein
So much. Holy Hell. www.cbc.ca/news/canada/...
Here's what each federal department plans to cut under Budget 2025 | CBC News
Tuesday's federal budget offers a glimpse into how dozens of government departments plan to rein in spending following this summer's comprehensive expenditure review. Here's a department-by-departmen...
www.cbc.ca
November 7, 2025 at 4:06 PM
So much. Holy Hell. www.cbc.ca/news/canada/...
🔭💫🎉 New paper accepted and now out on the arxiv:
Early evidence for isotropic planetary obliquities in young super-Jupiter systems
arxiv.org/abs/2511.04091
Early evidence for isotropic planetary obliquities in young super-Jupiter systems
arxiv.org/abs/2511.04091
November 7, 2025 at 3:36 PM
🔭💫🎉 New paper accepted and now out on the arxiv:
Early evidence for isotropic planetary obliquities in young super-Jupiter systems
arxiv.org/abs/2511.04091
Early evidence for isotropic planetary obliquities in young super-Jupiter systems
arxiv.org/abs/2511.04091
Reposted by Hanno Rein
Doug Ford cancelled green energy projects as one of his first actions. Now he’s subsidizing hydro rebates to the tune of $8 BILLION. Our money.
Australia has so much electricity from solar power that it is going to start offering free electricity to everyone for at least three hours during the day as the wholesale price of power goes negative
electrek.co/2025/11/04/a...
electrek.co/2025/11/04/a...
Australia has so much solar that it's offering everyone free electricity
Australia's extensive solar power penetration makes so much energy that the government wants to offer free electricity at peak hours.
electrek.co
November 6, 2025 at 3:46 PM
Doug Ford cancelled green energy projects as one of his first actions. Now he’s subsidizing hydro rebates to the tune of $8 BILLION. Our money.
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
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.
Reposted by Hanno Rein
Your reminder that COVID and flu shots are now available! Get them so we don't all spread it around and kill your grandpa or baby.
November 3, 2025 at 8:31 PM
Your reminder that COVID and flu shots are now available! Get them so we don't all spread it around and kill your grandpa or baby.
Thursday is my hands-on statistics lecture. We'll first make some fresh popcorn. We record the time it takes for individual kernels to pop and use that to talk about the central limit theorem.
November 3, 2025 at 5:46 PM
Thursday is my hands-on statistics lecture. We'll first make some fresh popcorn. We record the time it takes for individual kernels to pop and use that to talk about the central limit theorem.
Making plans for our walk-in closet.
November 1, 2025 at 9:42 PM
Making plans for our walk-in closet.
We are trying to capture some stray kittens. We got one! There might be up to 4 more.
October 31, 2025 at 9:05 PM
We are trying to capture some stray kittens. We got one! There might be up to 4 more.
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
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 […]
Reposted by Hanno Rein
The astrophotographer I worked with earlier this month, Jeanine Holowatiuk https://www.instagram.com/jeanine.holowatuik/ https://northernescapephotography.com/about/ sent me some horrifying (Halloween-levels of scary) time lapse movies she took of Comet Lemmon.
Why horrifying? Starlink.
Why horrifying? Starlink.
October 31, 2025 at 6:56 PM
The astrophotographer I worked with earlier this month, Jeanine Holowatiuk https://www.instagram.com/jeanine.holowatuik/ https://northernescapephotography.com/about/ sent me some horrifying (Halloween-levels of scary) time lapse movies she took of Comet Lemmon.
Why horrifying? Starlink.
Why horrifying? Starlink.
Reposted by Hanno Rein
The Ford Brothers have a long record of acting against Ontario’s Conservation Authorities. This is troubling.
The province is creating the Ontario Provincial Conservation Agency (OPCA) to "provide centralized leadership, efficient governance, strategic direction and oversight of all conservation authorities." Some conservation authorities will be consolidated, but the province insists no jobs will be lost.
Ontario Newsroom
news.ontario.ca
October 31, 2025 at 5:05 PM
The Ford Brothers have a long record of acting against Ontario’s Conservation Authorities. This is troubling.
Reposted by Hanno Rein
This is certainly worth looking at for anyone interested in comets. 🔭
Downloads of my Bright Comets app are picking up. This can only mean one thing: There's a bright comet out there! Well, two actually!
Free download: apps.apple.com/gb/app/brigh... #comet #astronomy
Free download: apps.apple.com/gb/app/brigh... #comet #astronomy
October 21, 2025 at 1:54 AM
This is certainly worth looking at for anyone interested in comets. 🔭
Downloads of my Bright Comets app are picking up. This can only mean one thing: There's a bright comet out there! Well, two actually!
Free download: apps.apple.com/gb/app/brigh... #comet #astronomy
Free download: apps.apple.com/gb/app/brigh... #comet #astronomy
October 21, 2025 at 12:34 AM
Downloads of my Bright Comets app are picking up. This can only mean one thing: There's a bright comet out there! Well, two actually!
Free download: apps.apple.com/gb/app/brigh... #comet #astronomy
Free download: apps.apple.com/gb/app/brigh... #comet #astronomy
Reposted by Hanno Rein
I shit you not, this article from CNN was only 40 days ago.
"Trump demanded they prove publicly that vaccines are effective in combating Covid"
"Trump demanded they prove publicly that vaccines are effective in combating Covid"
October 11, 2025 at 1:21 AM
I shit you not, this article from CNN was only 40 days ago.
"Trump demanded they prove publicly that vaccines are effective in combating Covid"
"Trump demanded they prove publicly that vaccines are effective in combating Covid"
My work week started at 4am this Monday as I was invited to give a talk at the #ChaICA6 (IAU Commission B1 - Computational Astrophysics - Challenges and Innovations in Computational Astrophysics VI). The meeting is being held in Mohali (India) but I gave the talk remotely (middle of teaching term).
September 29, 2025 at 11:52 AM
My work week started at 4am this Monday as I was invited to give a talk at the #ChaICA6 (IAU Commission B1 - Computational Astrophysics - Challenges and Innovations in Computational Astrophysics VI). The meeting is being held in Mohali (India) but I gave the talk remotely (middle of teaching term).
I need some blue hive mind help: Is there a *very easy* to use amateur telescope (think @unistellar.bsky.social evscope, or seestar) that can be used for spectroscopy?
August 14, 2025 at 7:29 PM
I need some blue hive mind help: Is there a *very easy* to use amateur telescope (think @unistellar.bsky.social evscope, or seestar) that can be used for spectroscopy?
🔭☄️ By the way, the #interstellar #comet 3I/2025 N1 (ATLAS) is on my free Bright Comets #iOS app, in case you want to know where it is right now. Spoiler: it's still very faint at 16 mag. But it should brighten up to 12 mag by October.
apps.apple.com/us/app/brigh...
#astronomy
apps.apple.com/us/app/brigh...
#astronomy
July 20, 2025 at 3:40 PM
🔭☄️ By the way, the #interstellar #comet 3I/2025 N1 (ATLAS) is on my free Bright Comets #iOS app, in case you want to know where it is right now. Spoiler: it's still very faint at 16 mag. But it should brighten up to 12 mag by October.
apps.apple.com/us/app/brigh...
#astronomy
apps.apple.com/us/app/brigh...
#astronomy
Reposted by Hanno Rein
I’m no economist but it seems to me that austerity will weaken, not strengthen Canada
#Breaking: Carney government tells CBC, Via Rail and other Crown corps to propose their own spending cuts
Suggest your own spending cuts, Carney government tells CBC, Via Rail
Federally funded institutions and Crown corporations like the CBC and Via Rail are expected to propose their own cuts under the Liberal government's sweeping efforts to find $25 billion in
www.thestar.com
July 16, 2025 at 10:24 PM
I’m no economist but it seems to me that austerity will weaken, not strengthen Canada
💧🪴 I finally got around to installing the trip irrigation system for the peppers and eggplants. I got all the stuff for free from some stranger on Facebook! And I’ve only used about a quarter of it so far.
July 13, 2025 at 12:09 AM
💧🪴 I finally got around to installing the trip irrigation system for the peppers and eggplants. I got all the stuff for free from some stranger on Facebook! And I’ve only used about a quarter of it so far.
