🇺🇸 Mild-mannered professor by day. Astrophysicist by night. Methodist, Smoky Mountain hillbilly. Observational research on active galaxies & galaxy evolution.

Joined November 2014
3,406 Photos and videos
Tim Hamilton retweeted
Hydrangea blossoms range from pink to blue in alkaline and acidic soil. The anthocyanin molecule that gives the petals their color (delphinidin 3-O-glucoside) can change colors with pH (like litmus paper and red cabbage water). However, the range of colors does not come from the pH of the petals. Instead, delphinidin binds to aluminum ions with a co-pigment like 5-O-caffeoylquinic acid to turn the blossoms blue. The petals stay pink in alkaline soil because aluminum ions are not soluble at high pH.
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Got my printing presses set up at last. Did a quick test—my first real print ever—with a simple business card. Elegant. Refined. Misspelled.
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Tim Hamilton retweeted
THE VIDEO: Union Pacific Big Boy 4014 passes over the Tunkhannock Viaduct. A 1.2-million-pound steam legend crossing one of the largest concrete railroad viaducts ever built. Nicholson, Pennsylvania delivered an unforgettable scene today.
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Hey, @JohnnyCallicutt—I was pulling out some wooden blocks in the printing shop and found this fragment of an OLD Nancy strip stuck to one. Only a partial date visible (the day), but the scrap also showed a Pete Hansen comic, so that puts it sometime before 1983, I think.
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I was in grad school that fall, and I have a vague memory of surfing the early web and finding a reference to this pizza place where you could order from the web. I think I even visited the site but saw that it wasn’t anywhere near me. I had no idea of its significance then.
In the summer of 1994, the internet was a quiet place. There were no secure shopping carts, no digital wallets, and no Amazon. Most people viewed the web as a giant digital bulletin board. But a small group of twenty-somethings working at Pizza Hut headquarters in Wichita, Kansas, wanted to try something crazy. They built a crude, gray website called "PizzaNet." To test it, they set up a computer in a local pizza shop. If a customer lived in Wichita, had a rare internet connection, and knew the specific web address, they could type in their name, address, and select a medium pepperoni, mushroom, and extra cheese pizza. The website didn't even have a way to accept credit cards. The order just popped up on a screen in the kitchen, the cooks baked it, and the delivery driver collected cash at the door. In late August 1994, a customer actually placed an order. The screen beeped, the pizza was made, and history was quietly altered. It is widely considered the very first commercial purchase ever made on the public web. Within a year of that single pizza delivery, Amazon and eBay were founded. Today, global e-commerce is a multi-trillion-dollar industry that delivers everything from groceries to cars directly to your doorstep. But the entire digital economy we rely on today kicked off because someone was sitting at home in Kansas, staring at a computer screen, and really wanting a slice of pizza. 🍕💻
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It’s those Ohio Amish. One of the favorite lines of a friend of mine from Ohio.
One of the most satisfying moments in WITNESS (1985) is watching a local punk mistake John Book for an ordinary Amish man. Harrison Ford lets the misunderstanding breathe just long enough before correcting it the hard way.
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Checks out.
Unbiased poll results for Dolly Parton
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I’m not a fan. His smug dismissals of religion and philosophy while not understanding either are annoying enough, and then he runs on this reputation as an astrophysicist when he’s hardly done any research at all. He’s probably good as a popularizer, but he’s not an expert.
Here is a story about a group of students who fundraised and worked for an entire year to bring Neil de Grasse Tyson to speak at an event: "We were a small college club with around 10 members and on a whim one of our members emailed tyson's agent to see if we could book him. We found out it would cost 40k (it raised to 50k in December of that year where I think it still might be) for his speaking fee plus expenses to have him come to our college for 1 day where he'd host a small lecture, a press meeting, dinner with up to 6 people, and the main lecture and a book signing time permitting. We decided to go for it, and spent a year where our club exclusively worked on bringing him in. When he arrived, myself and others introduced ourselves and our fields of study. He went after first of us in humanities or soft sciences pretty much relentlessly from the get go. We're all used to the philosophy major working at McDonald's joke, but he wasn't trying to be funny, and spent the ride from the airport making repeated comments about the uselessness of our majors. Additionally he spent about 5 minutes trying to show that logic was stupid but he was citing logical rules and Occam's razor. The small lecture was him bragging about how famous he was, and how easy it is to pull yourself out of poverty or etc. The dinner was for leaders of other clubs so helped us raise money. He took the piss out of how one student held her fork, and was impossibly smug when giving advice to physics students. The main event was a terribly boring lecture consisting of fart jokes and fan service; teasing the upcoming TV series he was in and not much else. He spent a quarter of the time reading Sagan's blue dot, which is nice but shouldn't have cost us because it wasn't his material. He left at about 2am, and we were all exhausted because we had spent the day busy setting up and tearing down. The whole affair cost nearly 85k. The additional money being for locations, personnel, air fare, Tyson's hotel, catering, etc. We all decided he was an ass hole. I'd never want to spend 16 hours with a celebrity again." From another member of the same group: "Neil deGrasse Tyson, who came to our university, gave a crappy speech rife with lame fart jokes, was rude and disrespectful with the people who organized the event (there were a couple campus clubs working on it for about a year). He equated one of the group's member's philosophy major as a degree in mental masturbation. We were so pumped to hear a talk about the universe, astrophysics, black holes and dark matter, and instead he gave a speech on debunking lame pop media science misconceptions such as the "supermoon" because the organizing club is known as a skeptic/secular humanist society. He then basically said he did us a favor and that we "owed him one" for that. He delivered a private lecture to our group and members of the campus physics club in which he realized he had said something witty, whipped out hsi iphone, and spent the next fifteen minutes trying to come up with the perfect wording for it to post it to his twitter. In the middle of a lecture we spent a year's work and $55k total to organize."
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Ouch. You can't rip your ex out of the photo in a Daguerrotype, so you've got to resort to other means.
I guess it didn't work out!
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Tim Hamilton retweeted
I'm actually building this into a little web app that will integrate with Apple Maps, Waze and Google Maps. Lots of different smaller trips and larger trips. All built for DixieMAXXING roadtrips.
You should always be Southern roadtripping whenever possible. I've developed one of the best maps for this ever to be constructed.
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Replying to @globeandmail
The previous headline on this article did not meet The Globe’s editorial standard. It has been replaced.
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I saw this Pullman pass by and didn’t have any idea of its significance.
The last car in the Union Pacific Big Boy train was not a caboose, obviously. It was a Pullman car. Specifically, it was the Marco Polo, built in Chicago in 1927. It was used by Franklin Delano Roosevelt when he was governor of New York and president of the United States. Normally, it is on display at the Southeastern Railway Museum in suburban Atlanta, Georgia.
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You heard the man.
Amerikanerne burde nektes å delta i internasjonale fotballstevner frem til de lærer seg at det heter fotball
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Tim Hamilton retweeted
Classic novels simply aren't relatable. Even contemporary literature is often about things I have never personally experienced. My preferred genre is autobiographical fiction that I have written myself
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Tim Hamilton retweeted
During a spacewalk early in his career, @astro_luca's helmet began to fill with water. As the water started to rise Luca couldn't breathe, communicate or even see, relying on his safety tether to return to the airlock - and safety. He handled the life-threatening crisis with so much calm and clarity that his heart rate stayed stable at a resting rate and colleagues at mission control couldn't even tell he was stressed. This is a story that is passed around the hallways at ESA as legend. It's a story that tells you more about an astronaut than any CV ever could. Luca is precise, composed and determined. He is exactly the right person for this role. A test pilot by training, with two missions to space, a commander of the International Space Station – he has seen spaceflight from every angle that matters. Yesterday I felt so much pride for Luca, as I caught a glimpse of his two daughters from the audience while they watched their father named part of the #ArtemisIII crew, in what must be one of the most emotive moments of his career. Caro Luca, siamo tutti orgogliosi di te. Buon volo! esa.int/Science_Exploration/…
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Tim Hamilton retweeted
The next astronauts on the Moon won't just walk. They'll drive. In a Toyota. This is not science fiction. The contract is already signed. NASA and Japan shook hands in 2024. Japan builds the vehicle. America flies it to the Moon. Its name: the Lunar Cruiser. Yes. Named after the Land Cruiser. The Moon is getting an off-roader. Two astronauts can live inside it for 30 days. No spacesuits needed inside. It runs on hydrogen. The tires are solid metal. Range: about 6,200 miles across the lunar surface. And NASA reserved seats on Artemis for Japanese astronauts. The first humans on the Moon who aren't American will get there riding with NASA. As NASA's chief put it, America won't be walking up there alone anymore. One more thing. The Moon has no wind. No rain. Nothing to erase a mark. Those Toyota tire tracks will still be there in a million years. Right next to the American footprints from 1969. I get goosebumps every single time I think about it.
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Tim Hamilton retweeted
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Tim Hamilton retweeted
The most surreal thing of our trip so far. Currently driving towards Louisiana and the radio station we were listening to started talking about our trip and played Ella Langley especially for us😭😭😭
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Tim Hamilton retweeted
Long post, but this one is important to me so I hope you stick it out! In January I reached out to Artemis II Commander @astro_reid with a simple ask- was he open to capturing the moon like I do for my colorful moon photos during the flyby? He humbly agreed, and we worked out a plan to incorporate into the photos captured as the crew approached the moon. The premise was simple- just capture enough photos in a burst to allow for image stacking to improve image fidelity, potentially to reveal color no human has ever captured. What he brought back was nothing short of magnificent. When I initially stacked the raw photos, it exceeded my expectations by far. The color came right out of the seemingly gray images, and showed details I've never seen before. It's possible nobody has. The lack of atmosphere meant a lot of color normally absorbed and scattered was present, so even the "near side" features looked exotic and unfamiliar. This view of the moon from an alien perspective made the usually-familiar lunar surface fresh and exciting, and the color we were able to resolve gave us valuable insight to the complex geological history of it's battered surface. Then, I faced a bit of a moral dilemma. I wanted people to be able to own these images in print- but I wouldn't feel right to profit off of them. As an active NASA astronaut, Reid certainly can't. He took these photos as part of a taxpayer-funded mission. If I couldn't split profits with him I didn't see a way to do this ethically, so I decided to release the images initially with no print offering, despite many requests!  Then, it clicked. After doing some research- I decided that I should do a print sale where the profits go 100% to charity. That way I can make prints available, do some good in the world, and it doesn't feel like an ethical conflict. ​I'm pleased to share my first EVER entirely-for-charity print release. ​ At the end of this sale all proceeds with be donated to UT MD Anderson Cancer Center. It feels fitting. I will follow up in a future post with a receipt from the donation, so you know how much we were able to donate. When I released this to my email subscribers only, we were already able to raise around $15k. Amazing! The limited edition fine art print is now publicly available, you can grab one of them at the link in my bio (also linked further in the thread) for a short time. Thank you for helping me do something good with my platform. Seriously... it feels amazing.
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Tim Hamilton retweeted
When I was a sophomore physics student, still on the "I totally understand Newtonian physics" high, I encountered quantum physics for the first time and had a major crash-out. I got into a huge argument with my brother, who was a few years ahead of me, about how this baloney made no sense. He kept telling me: Don't try to make it make sense, just learn it. He was right. A few years later, I made peace with quantum weirdness. It's as close as science gets to mysticism, and I kind of love it.
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