Dennis Just ๐ŸŒต's Avatar

Dennis Just ๐ŸŒต

@sciencepolice

Astronomy and physics professor, former Orbital Mechanic, and officially a Superhuman - cats, spaceflight, ๆ—ฅๆœฌ่ชž, gardening, and video games.

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Latest posts by Dennis Just ๐ŸŒต @sciencepolice

Saw the Minibosses live ๐Ÿ˜Ž

03.03.2026 20:02 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Not to say he isnโ€™t a scumbag, but I think heโ€™s answering that โ€œitโ€™s not his job [to determine whether the Iranians go w a cleric, representative democracy, etc]โ€, rather than itโ€™s not his job to have a plan to keep Iran from sponsoring terrorism. Lying, regardless.

01.03.2026 15:48 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

What you may be thinking of is that water ice can *behave* like rock on cold worlds, for e.g. on Pluto water ice forms the bedrock of its crust.

11.02.2026 13:30 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Anyone with eclipse shades (or a welder's mask) and clear skies should check out this massive sunspot 4466.

10x larger than the Earth, you can see it's *shape* with the naked eye. Incredible โ˜€๏ธ

03.02.2026 17:03 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A gray couch with two black blobs on it. The foreground blob is a cat napping on some blankets, while the background blob is a folded black sweater.

A gray couch with two black blobs on it. The foreground blob is a cat napping on some blankets, while the background blob is a folded black sweater.

Which is cat, and which is folded sweater? ๐Ÿˆโ€โฌ›

21.01.2026 18:15 ๐Ÿ‘ 7 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
8.3 Assault on Federal Officer or Employee | Model Jury Instructions

You just made me check under my district (9th circuit), and indeed it does require some form of assault here.

www.ce9.uscourts.gov/jury-instruc...

09.01.2026 16:51 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

As far as I can tell, the Schmidt Observatory System is essentially โ€œwhat are the best next-gen facilities coming online in the future? Ok yea letโ€™s just build all of them nice and fast and synergize them w the rest of the community.โ€ Incredible ๐Ÿ“ก๐Ÿ”ญ๐Ÿ”ญ๐Ÿ›ฐ๏ธ

08.01.2026 00:49 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I wasn't familiar with that film, but it looks like a similar idea. It looks great, I'll have to check it out

02.01.2026 16:26 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
A float at the Rose Parade showing a damaged robot with glasses with hearts in them lying down in a forested scene. A tiger has some wiring in its mouth on the robot's leg, a monkey climbs on its right shoulder, and several bird lie at the top. A sign with the words Rose Parade are obscured but lie in the background. The scene is rainy with a few people visible in the foreground.

A float at the Rose Parade showing a damaged robot with glasses with hearts in them lying down in a forested scene. A tiger has some wiring in its mouth on the robot's leg, a monkey climbs on its right shoulder, and several bird lie at the top. A sign with the words Rose Parade are obscured but lie in the background. The scene is rainy with a few people visible in the foreground.

How cool is this - Cal Poly Pomona and SLO's float, the only one designed and built entirely by students, won the Rose Parade.

The float's message is about the dangers of climate change, with a bunch of cute woodland animals repairing a damaged robot ๐Ÿค–

www.cpp.edu/news/content...

02.01.2026 15:13 ๐Ÿ‘ 5 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I can't parse it myself. If we assume the top 1% is just broken out of the top 10%, then I'd conclude what you wrote, but what about the 51-89 percentile workers, do they control zero percent of the wealth? What is going on with that chart.

02.01.2026 04:42 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Trying to outflank things knowing he's criticizing a black woman talking about racism in America? Setting the tone by first accusing her of privilege.

30.12.2025 21:21 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Title: โ€œEvery governing party facing election in a developed country this year lost vote share, the first time this has ever happened.โ€

This is followed by a plot showing data since the early 1900s of the rise/fall in vote share for governing parties in national elections. The U.S. is highlighted in red on the right in 2024.

Title: โ€œEvery governing party facing election in a developed country this year lost vote share, the first time this has ever happened.โ€ This is followed by a plot showing data since the early 1900s of the rise/fall in vote share for governing parties in national elections. The U.S. is highlighted in red on the right in 2024.

Iโ€™m no political expert, but it seems to me any explanation of the 2024 U.S. election needs to account for the incredible anti-incumbency wave that year.

28.12.2025 14:08 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Skydivers landing at Arizona Stadium?? #Tucson

27.12.2025 21:28 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Hey Martians, did I mention we now also have a video of epic Phobos passing over a Martian dust storm near Pavonis Mons? ๐ŸŒช๏ธ๐ŸŒ‹๐Ÿฅ”

Video & full info: flic.kr/p/2rNN8wk
Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY

@esa.int Mars Express HRSC
300 MP Photo quoted below
Easy zoom: easyzoom.com/image/674026

27.12.2025 14:01 ๐Ÿ‘ 440 ๐Ÿ” 181 ๐Ÿ’ฌ 7 ๐Ÿ“Œ 5

Dividends as a sign of financial health - that's smart ๐Ÿ‘

19.12.2025 04:32 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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I'm very happy I woke up at 4am this morning to catch 3I/ATLAS right before its closest approach to Earth (today!) This interstellar visitor is traveling over 60 km/s โ˜„๏ธ

At 269 million km (1.8 AU), I took a series of 2.5 min exposures with my Seestar ๐Ÿ”ญ

18.12.2025 16:13 ๐Ÿ‘ 13 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Just a little PSA - if you have any solar eclipse shades (or a welder's mask), you should try and check out the massive sunspot group that has rotated into view these past few days.

It looks so big it may be naked-eye visible, which is pretty neat!

03.12.2025 16:46 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Did it!

27.11.2025 19:19 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A black cat lies on a brown carpet. The TV in the back shows the Super Nintendo game The 7th Saga. The text says โ€œGood morning. Have a safe journey.โ€

A black cat lies on a brown carpet. The TV in the back shows the Super Nintendo game The 7th Saga. The text says โ€œGood morning. Have a safe journey.โ€

Todayโ€™s big Thanksgiving goal is to finally, after all these decades, beat 7th Saga ๐ŸŽฎ ๐Ÿˆโ€โฌ›

27.11.2025 17:08 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
A white and brown catโ€™s face at the left, with a small brown table at center with a half-finished espresso martini and a laptop showing the Arizona-Baylor football game on top.

A white and brown catโ€™s face at the left, with a small brown table at center with a half-finished espresso martini and a laptop showing the Arizona-Baylor football game on top.

Different setup today - go Cats! ๐Ÿˆ๐Ÿธ

22.11.2025 19:14 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A fluffy white cat is sitting, like a loaf, on top of a Hulk Hogan wrestling buddy (an old plush toy).

A fluffy white cat is sitting, like a loaf, on top of a Hulk Hogan wrestling buddy (an old plush toy).

๐ŸŽ™๏ธ and Bok Choy's got Hogan down for the count!! ๐Ÿฑ๐Ÿคผ

22.11.2025 00:39 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Arizona Athletics and Casino Del Sol Announce Transformative $60 Million-Plus Stadium Naming Rights Partnership - University of Arizona Athletics The partnership is the largest in the Big 12 Conference

Shoot, they're renaming Arizona Stadium to the Casino Del Sol Stadium. I always liked that we had a normal stadium name without a dumb corporate name, but $60M I guess ๐Ÿคท

arizonawildcats.com/news/2025/11...

17.11.2025 16:44 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Title: "Points of interest."
Frame: A drawing of the telescopes at Kitt Peak, but their domes are drawn as kitty cats. The 90-inch Bok telescope has a flat top, like a cat tree.
Caption: "Kitty Peak National Observatory. Famous for pioneering work in the study of shiny objects that move."

Title: "Points of interest." Frame: A drawing of the telescopes at Kitt Peak, but their domes are drawn as kitty cats. The 90-inch Bok telescope has a flat top, like a cat tree. Caption: "Kitty Peak National Observatory. Famous for pioneering work in the study of shiny objects that move."

Kitty Peak National Observatory ๐Ÿฑ

I have no idea where I stumbled on this but it's in my photos from the summer of 2020. And I love it! ๐Ÿ”ญ Is the 90" supposed to be a cat tree? #astronomy #cats

17.11.2025 14:17 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A black cat in the foreground, with a white/brown cat behind. A wrestling buddy plushie of Hawk lies in the left, and a Penn State football player is on the tv in the background.

A black cat in the foreground, with a white/brown cat behind. A wrestling buddy plushie of Hawk lies in the left, and a Penn State football player is on the tv in the background.

Now for these dopey Nittany Lions, that takes two cats, evidently ๐Ÿˆ๐Ÿˆโ€โฌ›๐Ÿˆ

Jfc, already huh

15.11.2025 20:47 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Perfect kick!! Wooo

15.11.2025 20:17 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
A surreptitious photo taken in a gym. There is black exercise equipment in the foreground, while Wilbur and Wilma Wildcat (the University of Arizona's mascots) are talking to two student employees in red shirts.

A surreptitious photo taken in a gym. There is black exercise equipment in the foreground, while Wilbur and Wilma Wildcat (the University of Arizona's mascots) are talking to two student employees in red shirts.

That time last May when I saw Wilbur and Wilma come to the rec center ๐Ÿคฉ

15.11.2025 18:46 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
A small black cat in the front, with a tv showing college football in the background.

A small black cat in the front, with a tv showing college football in the background.

Go cats! Bear down!๐Ÿฑ ๐Ÿˆ

15.11.2025 18:43 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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The Distribution of Earth-Impacting Interstellar Objects In this paper we calculate the expected orbital elements, radiants, and velocities of Earth-impacting interstellar objects. We generate a synthetic population of $\sim10^{10}$ interstellar objects wit...

What a title for a paper lol โ˜„๏ธ๐Ÿ˜ณ

Out of 10 billion simulated, ten thousand strike the Earth.
arxiv.org/abs/2511.03374

09.11.2025 17:45 ๐Ÿ‘ 2 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A television showing two broadcasters in suits. A tiny black cat lounges on a false wall behind the tv.

A television showing two broadcasters in suits. A tiny black cat lounges on a false wall behind the tv.

A fluffy white cat in the foreground. A television showing a broadcaster is in the background.

A fluffy white cat in the foreground. A television showing a broadcaster is in the background.

Watching dopey Penn State in the new place ๐Ÿˆ

08.11.2025 17:10 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I thought there was zero chance heโ€™d spell intifada correctly, so tbh Iโ€™m impressed

05.11.2025 16:57 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0