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Prof. Ghosty Neilsen

@joeyneilsen.bsky.social
4.9K followers 1.1K following 5.1K posts

Black hole astrophysicist at Villanova. Formerly: MIT, Boston University, Harvard, Kenyon College | X-rays | husband | dad of 2 | cooking. He/him. Skeets are my own.

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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 01/10/2026
🤡: The court has allowed far more hurtful methods, like firing squad. 🤡: So Tennessee should use that.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 30/09/2026
omg omg everyone my computer's alive, look look: it just said "hello world!"
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 30/09/2026
omg omg everyone my computer's alive, look look: it just said "hello world!"
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 28/09/2026
Huille of Fortune
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 24/09/2026
who's got two thumbs and just learned how pineapples grow 🤯
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 15/09/2026
He bought blueberries, but the blueberries were TOO tart.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 14/09/2026
It's almost like there should be some sort of procedure where law enforcement interested in surveillance should have to convince a knowledgable authority that the surveillance is warranted, that they have a good reason (a "probable cause," if you will) for their search...
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 13/09/2026
Make a band edible: cR.E.M.ini
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 07/09/2026
Wife: Please don't... Me: [holds stud finder to chest] Stud finder: [does not make a beeping noise] Me: [does not make a beeping noise] Me: It's a stud finder and it's working.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 31/08/2026
This has been a pillar of opposition to social welfare programs for as long as I can remember, especially coupled with racist judgments about who “deserves” help and who doesn’t.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 30/08/2026
Change a letter, change a movie: Raging Bulb
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 29/08/2026
Downgrade a movie: 2001: A Space Roadtrip
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 29/08/2026
Make your favorite film sound as boring as possible without giving away the title: Man has something to prove. hm. not quite. Man tries to buy time. no, not boring enough. Desperate man hunts for killer. still no. Man uncovers conspiracy. I can't do it. It's just not boring.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 28/08/2026
Me: Oooh that rules, I've never heard of an oven with deBroglie setting! Is it adjusting the wavelength of the dishes, like a cavity, or does it change the momentum of whatever you put in there? Salesperson: What??? I just said "the broil setting works really well." Me, disappointed: Oh. Cool cool
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 25/08/2026
When you look at the moon through a telescope, you can see craters and structure; it looks huge. When you look at a star through a telescope or binoculars, it looks the same as it does to your unaided eye. Is this the most in-your-face/everyday demonstration of the sheer size of the universe? 🔭
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 24/08/2026
Make a band bigger Neutral Milk Resort
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 22/08/2026
Optimist: The cup is half full Pessimist: The cup is half empty Physicist: This is a common misconception. Even if there were a vacuum in the top half of the cup, it would still be filled to the brim with quantum fields.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 21/08/2026
rip Charles Darwin you would’ve hated chatgpt
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 19/08/2026
A thing that happened in Reacher also basically happened to me, so... *famous*
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Markus Pössel @mpoessel.de · 01/08/2026
I wanted to hear @joeyneilsen.bsky.social 's joke about the Sirens, but I also know it would likely be dangerous, so now I'm in a bind.
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Michael Burns-Kaurin @mburnskaurin.bsky.social · 01/08/2026
I have a joke about Achilles, but I feel like a heel telling it.
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Alexander Howard @digiphile.bsky.social · 01/08/2026
I have a joke about Prometheus that fires an audience up, then leaves them gutted
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 01/08/2026
I have a joke about the Sirens but I'm not sure anyone should listen to it.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 29/07/2026
When you go to work with dad
A black and white dog sleeping curled up under a desk with her nose tucked under her tail. She’s lying on a Villanova blanket.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 28/07/2026
A number of TV hits have featured not-so-good-guys as their protagonists (think The Sopranos, Breaking Bad, Succession, Pluribus). Some critics argue that these shows glorify violence, cruelty, and selfishness. In this vlog, I will argue that what have you ever done? Where's your TV show? Huh? Well?
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 28/07/2026
A number of TV hits have featured not-so-good-guys as their protagonists (think The Sopranos, Breaking Bad, Succession, Pluribus). Some critics argue that these shows glorify violence, cruelty, and selfishness. In this vlog, I will argue that what have you ever done? Where's your TV show? Huh? Well?
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 16/07/2026
Why do you want to see the sky? We can see the air just fine... (This message brought to you by wildfire smoke)
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 06/07/2026
You may have heard that people struck by lightning can be blown out of their shoes? Welp, when my 8 y/o got to walk the dog in the park, she ran so hard that she pulled him out of his shoes! (He’s fine if a little surprised and a little the worse for wear).
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 02/07/2026
If you look VERY carefully, you might be able to spot two exquisitely hidden bunnies dozing in the grass on a hot summer evening.
What looks on first glance to be a bush and green grass in front of a house turns out on extensive inspection to contain two bunnies lying in the grass. see if you can find them.

(Jk they’re not very good at hiding).
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 24/06/2026
Don't... don't all companies need revenue? I thought this was a known problem if you don't want your business to go under.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 21/06/2026
Got bit by an animal and became that animal
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 18/06/2026
Finally got my operating system updated... all I had to do was wipe the hard drive and start over!
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 16/06/2026
Me: Too sleepy to go to the gym? Brain: You can't go until recommendation letter is done. 45 min later Me: I should go to the gym but I'm sleepy. Brain: Not till the letter's done tho. 20 min later Me: Ooh I should get to the gym. But hmm, kinda tired. Brain: Still no. (might be too tired tbh)
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 15/06/2026
[spin doctors voice] stayin up, stayin up, stayin up can’t be wrong
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 14/06/2026
My wife and are celebrating our 18th anniversary soon, and we've decided that 18 is not the porcelain anniversary but the "ductless mini split" anniversary.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 07/06/2026
some of the things will not be understood
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 05/06/2026
Going out on a limb, I think the moral of this story is Happy Pride... Happy Pride everyone! 🏳️‍🌈
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 05/06/2026
A guy drives up slowly in an old silver pickup truck, dragging some boards into a nearby tree. He leans out the window. Guy: "My dad says this truck makes me look flamboyant. *pause* But then how does he explain THIS?!?!?" He throws a large handful of flower petals out the window and drives away.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 05/06/2026
Always fun to see Pennsylvania in the news!
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Dr Pamela L Gay @starstryder.space · 02/06/2026
Ok... I made it to page 3: financials summary. Bottom line: They are running at a loss. In Q1 2026, they lost ~$2 billion. Assuming that is consistent for the year, they will lose about ~$8 billion. NASA SMD budget is $7.25 billion in FY26. SpaceX will run into the red more than NASA SMD has.
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 31/05/2026
Me: 1 out of 2, not bad... not too bad at all!
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 30/05/2026
I got lots of different answers, but this one really came out of left field.
Me googling: how many days in the week have a fish in them

AI Overview: You might be thinking of two days that literally have the word "fish" in them: Fishguard (Wales) and Fishers (Indiana, USA).

However, if you are asking this as a fun trivia riddle based on the spelling of the days, the answer is zero. None of the standard seven days of the week contain the word "fish".
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 30/05/2026
12 y/o, on the phone: we're not really a "soup family." me, eavesdropping: that's because you and your brother won't eat soup
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Jacquelyn Gill @jacquelyngill.bsky.social · 29/05/2026
🧵 Public science in the US has taken some heavy hits over the last year, but the White House OMB is proposing a series of changes that will result in a TKO for science as we know it unless we fight back. Here's what's happening, and why it matters. 1/n
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 29/05/2026
Why would you do it like this
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 28/05/2026
Two times of note when my dog eats: 1. When we are eating. (If she's hungry, she will sometimes stamp and paw at us until someone agrees to have breakfast). 2. When there was an animal outside. She'll race between the windows woofing, then eat. I assume this is "you're not getting my food."
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 26/05/2026
Hungry whales? Krill issue
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 25/05/2026
Anyone know anything about the IOP publishing office? I requested an amended invoice for an ApJ letter about a month ago and the invoice and accounts receivable email addresses haven't replied to my follow-ups... 🔭
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Prof. Ghosty Neilsen @joeyneilsen.bsky.social · 24/05/2026
Is the set of all sets that are not members of themselves a member of itself?
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Trish Greenhalgh @trishgreenhalgh.bsky.social · 23/05/2026
Every summer I repost this article on how to spot drowning. Please read it and pass on. In the last few years I’ve had SIX messages from people who saved a kid’s life after clicking on the link from my feed. slate.com/technology/2...
slate.com
Drowning Doesn’t Look Like Drowning
Drowning is not the violent, splashing call for help that most people expect.
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