Dennis Just 🌵
@sciencepolice.bsky.social
Astronomy and physics professor, former Orbital Mechanic, and officially a Superhuman - cats, spaceflight, 日本語, gardening, and video games.
What a title for a paper lol ☄️😳
Out of 10 billion simulated, ten thousand strike the Earth.
arxiv.org/abs/2511.03374
Out of 10 billion simulated, ten thousand strike the Earth.
arxiv.org/abs/2511.03374
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...
arxiv.org
November 9, 2025 at 5:45 PM
What a title for a paper lol ☄️😳
Out of 10 billion simulated, ten thousand strike the Earth.
arxiv.org/abs/2511.03374
Out of 10 billion simulated, ten thousand strike the Earth.
arxiv.org/abs/2511.03374
Watching dopey Penn State in the new place 🏈
November 8, 2025 at 5:10 PM
Watching dopey Penn State in the new place 🏈
I'm gonna try posting to this blog each week. Back in Twitter's day I shared a lot of shuttle and space tidbits I thought were neat, and then used Twitter as a look-up reference. Now this blog will serve that role - I figure I might as well share it! 🚀
dennisjust.substack.com/p/oms-kit
dennisjust.substack.com/p/oms-kit
OMS Kit
Plus other OMS trivia
dennisjust.substack.com
November 2, 2025 at 8:03 PM
I'm gonna try posting to this blog each week. Back in Twitter's day I shared a lot of shuttle and space tidbits I thought were neat, and then used Twitter as a look-up reference. Now this blog will serve that role - I figure I might as well share it! 🚀
dennisjust.substack.com/p/oms-kit
dennisjust.substack.com/p/oms-kit
Reposted by Dennis Just 🌵
From the makers of the Apollo in Real Time websites comes a new experience with 500 times more data.
ISS in Real Time offers the chance to explore more than 9,000 days of photos, video and audio transmitted during the 25 years of continuous human residency on the International Space Station.
ISS in Real Time offers the chance to explore more than 9,000 days of photos, video and audio transmitted during the 25 years of continuous human residency on the International Space Station.
25 years, one website: 'ISS in Real Time' captures quarter-century on space station
With the milestone just days away, you are likely to hear this week that there has now been a continuous human presence on the International Space Station (ISS) for the past 25 years. But what does th...
www.collectspace.com
October 27, 2025 at 1:15 PM
From the makers of the Apollo in Real Time websites comes a new experience with 500 times more data.
ISS in Real Time offers the chance to explore more than 9,000 days of photos, video and audio transmitted during the 25 years of continuous human residency on the International Space Station.
ISS in Real Time offers the chance to explore more than 9,000 days of photos, video and audio transmitted during the 25 years of continuous human residency on the International Space Station.
Reposted by Dennis Just 🌵
Fresh JWST view of Uranus taken Oct 6 2025 with NIRCam.
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
October 26, 2025 at 2:04 PM
Fresh JWST view of Uranus taken Oct 6 2025 with NIRCam.
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Full size & more info: flic.kr/p/2rByidu 🔭🧪
Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY
Proposal PI: Varun Bajaj
Proposal ID: 8975
Filters: F150W2-F162M, F410M
Explaining Disco Elysium to my normie fiance... not an easy task 🍾🕺🏚
October 26, 2025 at 5:44 AM
Explaining Disco Elysium to my normie fiance... not an easy task 🍾🕺🏚
I usually don't have live plants in my office, since I work from home and other campuses all the time so I don't spend too much time there, but I grabbed this little fella on an impulse and I'm glad I did 🌱
October 25, 2025 at 6:16 PM
I usually don't have live plants in my office, since I work from home and other campuses all the time so I don't spend too much time there, but I grabbed this little fella on an impulse and I'm glad I did 🌱
Reposted by Dennis Just 🌵
A Long March 2D stage falling to Earth in Guinan county, Qinghai, following the launch of Shiyan-31 from Jiuquan on Oct. 13. Video: m.weibo.cn/detail/52219...
October 21, 2025 at 3:42 AM
A Long March 2D stage falling to Earth in Guinan county, Qinghai, following the launch of Shiyan-31 from Jiuquan on Oct. 13. Video: m.weibo.cn/detail/52219...
October 20, 2025 at 2:56 PM
Reposted by Dennis Just 🌵
Today in Portland, a fed shooting pepper balls from the roof of the ICE facility was so eager to aim for people’s heads, that after shooting one photographer in the head and another in the upper arm, they accidentally shot a DHS agent in the head. This photo shows the moment of impact;
October 13, 2025 at 2:09 AM
Today in Portland, a fed shooting pepper balls from the roof of the ICE facility was so eager to aim for people’s heads, that after shooting one photographer in the head and another in the upper arm, they accidentally shot a DHS agent in the head. This photo shows the moment of impact;
As a Kid Dynamite fan in the 90s - let’s go Mariners!
October 11, 2025 at 4:22 AM
As a Kid Dynamite fan in the 90s - let’s go Mariners!
@gregdoucette.bsky.social Sorry if this is duplicate but your tracking of puppicide was always useful via Fsck em all
Wen should direct more attention to incidents like these because Americans are more likely to respond to brutality to pets than to brutality to human beings.
EL PASO — a family says ICE showed up at their house looking for migrants and shot and KILLED THEIR DOG, then didn’t help them as the agent ran away and was not identified.
kfoxtv.com/news/local/e...
kfoxtv.com/news/local/e...
October 11, 2025 at 3:28 AM
@gregdoucette.bsky.social Sorry if this is duplicate but your tracking of puppicide was always useful via Fsck em all
Reposted by Dennis Just 🌵
Are you someone who is interested in astronomy graduate school? This is a list of many/most departments and their expectations for admissions this year. Please feel free to spread it far and wide. If you are doing admissions and you'd like to update your entry, reach out as per the form!
US Astronomy Graduate Admissions, AY 2025-2026
docs.google.com
October 10, 2025 at 6:44 PM
Are you someone who is interested in astronomy graduate school? This is a list of many/most departments and their expectations for admissions this year. Please feel free to spread it far and wide. If you are doing admissions and you'd like to update your entry, reach out as per the form!
Reposted by Dennis Just 🌵
October 9, 2025 at 12:41 AM
There we GO! 🏈
Let’s go State
Let’s go State
October 4, 2025 at 9:46 PM
There we GO! 🏈
Let’s go State
Let’s go State
Saw the University of Arizona is on the list. Hope they stand up for what's right 🌵
apnews.com/article/trum...
apnews.com/article/trum...
Trump asks 9 colleges to commit to his political agenda and get favorable access to federal money
The White House is asking nine major universities to commit to President Donald Trump’s political priorities in exchange for more favorable access to federal money.
apnews.com
October 3, 2025 at 2:44 PM
Saw the University of Arizona is on the list. Hope they stand up for what's right 🌵
apnews.com/article/trum...
apnews.com/article/trum...
I dunno if I’ve ever been this close to lightning before. Downtown Tucson is getting hammered right now, and my windows are shaking w each bolt 😨
September 26, 2025 at 5:45 PM
I dunno if I’ve ever been this close to lightning before. Downtown Tucson is getting hammered right now, and my windows are shaking w each bolt 😨
Is it me or do we not even bother with adding “-gate” to this admin’s corruption and scandals? Between the relentless cadence and the deference the media shows. It’s shameful.
September 22, 2025 at 11:32 PM
Is it me or do we not even bother with adding “-gate” to this admin’s corruption and scandals? Between the relentless cadence and the deference the media shows. It’s shameful.
"Can LIGO Detect Daylight Savings Time?"
"Yes, it can."
Lol this is awesome. LIGO's detection probability varies with weekends vs weekdays, day vs night, and daylight savings time vs standard time. Some fun figures in here ☀️
arxiv.org/abs/2509.11849
"Yes, it can."
Lol this is awesome. LIGO's detection probability varies with weekends vs weekdays, day vs night, and daylight savings time vs standard time. Some fun figures in here ☀️
arxiv.org/abs/2509.11849
September 16, 2025 at 4:53 PM
"Can LIGO Detect Daylight Savings Time?"
"Yes, it can."
Lol this is awesome. LIGO's detection probability varies with weekends vs weekdays, day vs night, and daylight savings time vs standard time. Some fun figures in here ☀️
arxiv.org/abs/2509.11849
"Yes, it can."
Lol this is awesome. LIGO's detection probability varies with weekends vs weekdays, day vs night, and daylight savings time vs standard time. Some fun figures in here ☀️
arxiv.org/abs/2509.11849
Robert Redford did so many great movies, but one I think of right away was 2013’s All is Lost. It is *fantastic*, and has almost zero dialogue. Just relied on Redford’s wonderful acting. RIP 🛥️
September 16, 2025 at 2:28 PM
Robert Redford did so many great movies, but one I think of right away was 2013’s All is Lost. It is *fantastic*, and has almost zero dialogue. Just relied on Redford’s wonderful acting. RIP 🛥️
Let’s go State! 🏈
September 6, 2025 at 4:10 PM
Let’s go State! 🏈
When they were planning on flying shuttle from Vandenberg AFB in the 80s, a number of steps were needed to take the shuttle from the North Base (where it lands) to the South Base (where it launches).
Hinged collapsible street signs, security booths on wheels, and new roads to avoid sharp turns ⛰️
Hinged collapsible street signs, security booths on wheels, and new roads to avoid sharp turns ⛰️
September 5, 2025 at 7:40 PM
When they were planning on flying shuttle from Vandenberg AFB in the 80s, a number of steps were needed to take the shuttle from the North Base (where it lands) to the South Base (where it launches).
Hinged collapsible street signs, security booths on wheels, and new roads to avoid sharp turns ⛰️
Hinged collapsible street signs, security booths on wheels, and new roads to avoid sharp turns ⛰️
What a graphic from Maxwell Zhu and Casey Dreier. I believe in collaborative exploration of space, and it's a shame to watch us disengage from it because our administration is so corrupt and stupid.
September 3, 2025 at 6:11 PM
What a graphic from Maxwell Zhu and Casey Dreier. I believe in collaborative exploration of space, and it's a shame to watch us disengage from it because our administration is so corrupt and stupid.
He’s just too cool 🐱
September 2, 2025 at 12:43 AM
He’s just too cool 🐱
I will never not read people writing LFG on social media as looking for group 🎮
September 1, 2025 at 2:59 PM
I will never not read people writing LFG on social media as looking for group 🎮