Advertisement · 728 × 90

Posts by Kevin Hardegree-Ullman

A stick figure drawing of a person running through an airport and holding onto a roller bag. The person steps on a ketchup packet. The pressure causes ketchup to explode out of the casing on an arc trajectory over a mother on her phone, holding a baby with a sippy cup to splat on the back of my head on the other row of seats. The iconic "Welcome to Fabulous Las Vegas Nevada" sign is above the scene to illustrate that this was in the Las Vegas airport.

A stick figure drawing of a person running through an airport and holding onto a roller bag. The person steps on a ketchup packet. The pressure causes ketchup to explode out of the casing on an arc trajectory over a mother on her phone, holding a baby with a sippy cup to splat on the back of my head on the other row of seats. The iconic "Welcome to Fabulous Las Vegas Nevada" sign is above the scene to illustrate that this was in the Las Vegas airport.

Addendum: A very poor illustration of what I think happened on that day.

4 days ago 8 0 0 0

On the flip side of the 2-hour plane ride, my sister is there to pick me up. As we get to the car, she asks, what’s on the back of your jacket? It was ketchup. That’s what I was smelling. That amused infant sure witnessed something incredible. 🤦

8/8

4 days ago 11 0 1 0

A modern-day magic bullet, if you will. On the plane, I enter the compact commode closet to wash away the grossness with water. In my seat, I still smell ketchup. Was I so traumatized by the incident that I now have phantosmia? 🪄

7/8

4 days ago 10 0 1 0

Somehow, in their haste to catch a plane no doubt, someone stepped on this crimson packet with enough force to cause an explosion of goo with an arc trajectory over 10 meters away and over a meter high, beyond the oblivious mother and now innocent infant, splat onto the back of my head. 🏃

6/8

4 days ago 9 0 1 0

In the corner of my eye is a squished ketchup packet on the floor about 10 meters from the back-to-back row of seats. 🍅

5/8

4 days ago 7 0 1 0

In the bathroom, I grab a stack of paper towels to wipe my head and pacify the bleeding. I rush back out to try to make my spot as people are getting on the plane, and glance in the direction of my previous seat to see if the woman and child are still there. 😒

4/8

4 days ago 8 0 1 0

Did this demon child smack me so hard to cause bleeding? Why wasn't the mother turning around to apologize for her child? Confused, I stand up as my section is being called to line up, and rush to find the nearest bathroom, which is just on the other side of the line of seats. 👹👶

3/8

4 days ago 8 0 1 0

I turn around in my seat to see an amused infant holding a sippy cup being carried over the shoulder by his oblivious mother. My head is wet. Okay, maybe this baby hit me with their cup and some liquid poured out. I reach back to feel the liquid. It isn't water. It is blood red. 🩸

2/8

4 days ago 8 0 1 0
Advertisement

Sorry, this needs a short story:

Sitting in the Las Vegas airport over a decade ago waiting for my connection, already miserable because I am traveling with a cold. Two minutes before being called up for boarding, I feel a *bonk* on the back of my head. 💥

🧵 1/8

4 days ago 20 4 1 1

They've done enough this week!

1 week ago 9 1 1 0
Webcam image looking toward the IRTF telescope on Maunakea. The observatory is completely covered in fog.

Webcam image looking toward the IRTF telescope on Maunakea. The observatory is completely covered in fog.

Hmm. I was looking forward to remotely observing tonight, but I don't think that's going to happen. 🔭😶‍🌫️

1 week ago 11 0 0 0

Congratulations! 🥳

1 week ago 2 0 0 0

Life Update: I am beyond excited to announce that this fall I will be joining the University of Georgia as an assistant professor!!!

1 week ago 25 1 7 0
Super-Earth masses and stellar abundances from NIRPS reveal tentative evidence for water-rich formation around M dwarfs Tracing the compositional link between terrestrial super-Earths and their host stars provides clues to their dominant formation pathway. By constraining the stellar abundances of refractory elements, we can predict the core mass fractions (CMFs) of their super-Earths. The level of agreement between this prediction and the planetary CMF derived from their masses and radii can reveal past formation processes, like mantle stripping and water-rich formation plus sequestration in the planet's core. Here, we present the first results from the Near Infrared Planet Searcher (NIRPS) GTO CMF subprogram: an intensive radial velocity campaign to refine masses and compute host stellar abundances of three hot super- Earths around M dwarfs (GJ 1132 b, GJ 1252 b, and LTT 3780 b), calculating masses of $1.69 \pm 0.15M_\oplus$, $1.54 \pm 0.18M_\oplus$, and $2.34 \pm 0.10M_\oplus$ respectively. We measure the CMFs of these and six further hot super-Earths with precise masses already available in the literature to 10-15% precision. We compare these to CMF predictions made from measuring the Fe, Mg, and Si abundances of their host stars measured from the NIRPS spectra. We find that the CMFs of these planets are smaller than expected from their host stellar abundances, to a statistically significant degree. This discrepancy is suggestive of significant reservoirs of water, and while these planets are too hot to harbor surface water, they likely have interior water mass fractions of $\sim$1%.

Paper day!!! 🎉 arxiv.org/abs/2604.07447 ⬇️ #exoplanets #astronomy

It all starts with planets around really small stars (M dwarfs). There's some evidence that planets around these stars form fundamentally differently than around stars like our Sun. We think that planets around these stars may 1/

1 week ago 21 11 2 0
Post image

The AAS Policy team has published a detailed breakdown of the proposed FY27 budgets for NASA, NSF, and DOE. aas.org/posts/news/2...

Take action now by asking your Senators to sign letters in support of NSF and NASA Science:

1️⃣ aas.org/urge-your-se...
2️⃣ aas.org/urge-your-se...

@policy.aas.org 🔭

1 week ago 22 15 0 1

I also don't like the term AI 'skeptic' as a catch-all for anyone against AI.

Skepticism implies questioning or doubting something, which should be happening anyway with generative AI.

I still can't get past the ethical, climate, and (intentional) addictiveness issues associated with these tools.

1 week ago 6 0 0 0

The Gaia DR3 IDs for TESS Input Catalog Targets RNAAS article is now published! #exoplanets 🔭🧪

iopscience.iop.org/article/10.3...

1 week ago 18 9 0 0
Advertisement
Preview
Refusal to Review I wrote the below email, when invited to review a paper that was partially processed by ChatGPT. As I imagine the email could be useful inspiration for others, I decided to make it available. Feel …

“Feel free to adapt and reuse. No attribution needed (…) If you make an adaption that you also want to share, I’d love to know about it, too.”

irisvanrooijcogsci.com/2026/04/08/r...

1 week ago 430 175 9 16

The Gaia DR3 IDs for TESS Input Catalog Targets RNAAS article is now published! #exoplanets 🔭🧪

iopscience.iop.org/article/10.3...

1 week ago 18 9 0 0

A few months ago, we were in the car on the way to preschool and the radio was on and they were talking about Mars for some reason. My son said, "I want to go to Mars... with you. We go on rocket ship to Mars." It was so adorable! 🥹

1 week ago 6 0 1 0
AO-1 - PLATO - Cosmos This 1st Announcement of Opportunity (AO‑1) marks the beginning of PLATO’s Guest Observers (GO) Programme. It offers the community access to space‑based, ultra‑high‑precision photometry for scientific investigations that are complementary to the mission’s core objectives. The AO‑1 Call opens on 7 April 2026 at 12:00 noon CEST and closes on 21 May 2026 at 12:00 noon CEST. Awards of observing time are expected by the end of August 2026, enabling successful proposers to prepare timely follow‑up proposals for other space‑ and ground‑based facilities. The associated observing cycle will cover the first two years of PLATO’s nominal operations. For example, assuming a launch in January 2027, this cycle would run approximately from April 2027 to April 2029.

The 1st PLATO Announcement of Opportunity for Guest Observers is out! #exoplanets 🔭

www.cosmos.esa.int/web/plato/ao-1

2 weeks ago 8 2 0 0
AO-1 - PLATO - Cosmos This 1st Announcement of Opportunity (AO‑1) marks the beginning of PLATO’s Guest Observers (GO) Programme. It offers the community access to space‑based, ultra‑high‑precision photometry for scientific investigations that are complementary to the mission’s core objectives. The AO‑1 Call opens on 7 April 2026 at 12:00 noon CEST and closes on 21 May 2026 at 12:00 noon CEST. Awards of observing time are expected by the end of August 2026, enabling successful proposers to prepare timely follow‑up proposals for other space‑ and ground‑based facilities. The associated observing cycle will cover the first two years of PLATO’s nominal operations. For example, assuming a launch in January 2027, this cycle would run approximately from April 2027 to April 2029.

The 1st PLATO Announcement of Opportunity for Guest Observers is out! #exoplanets 🔭

www.cosmos.esa.int/web/plato/ao-1

2 weeks ago 8 2 0 0

Slack is great until it signs you out of all accounts and you spend 15 minutes cycling through your email addresses to figure out which ones sign into which. I wish Slack allowed you to change your email address or had account consolidation.

2 weeks ago 21 0 1 0
Preview
"They operate like slot machines": AI agents are scrambling power users' brains Work with these tools is starting to look less like a fun quirk and more like a pathology.

On the topic of AI: "There are elements of gambling and addiction in the way people are using these tools." I would also add that there is an element of peer-pressure, which maybe explains why I'm so bitter about it.

www.axios.com/2026/04/04/a...

2 weeks ago 5 2 0 1
Advertisement

A gorgeous picture of our home from #ArtemisII!

However, it also highlights that space imagery is often edited to accentuate certain features.

The original photo is probably more representative of the moonlit surface of Earth, and is beautiful in its own right. 🧪🔭☀️🌍🚀🌕

www.nasa.gov/image-detail...

2 weeks ago 27 6 1 0

Sorry, this wasn't meant to throw shade at anyone! A user panel drives priorities for the Exoplanet Archive, so other things have been more pressing. Though, now we'll be ready to identify DR4 IDs for the TIC very shortly after it is released!

2 weeks ago 1 0 0 0
Preview
a night sky filled with lots of stars and the words maximum works below it Alt: A field of glistening stars brightening and dimming.

As always, thanks to my superstar colleagues Melanie Swain, @aussiastronomer.bsky.social, @emdwarf.bsky.social, @marcyharbut.bsky.social, @aurorakess.bsky.social, @lowbacca.bsky.social, Meca Lynn, and Julian van Eyken!

2 weeks ago 3 0 0 0

We plan to do the same thing when Gaia DR4 comes out in December, and not let something like this sit for ~4 years again.

2 weeks ago 5 0 2 0
GitHub - kevinkhu/ticgaia: TESS Input Catalog v8.2 and Gaia DR3 cross-match TESS Input Catalog v8.2 and Gaia DR3 cross-match. Contribute to kevinkhu/ticgaia development by creating an account on GitHub.

If you want to attempt to reproduce the catalog, see the Jupyter Notebook at github.com/kevinkhu/tic.... Note, this was done on a decent spec laptop running Linux with plenty of SSD storage space for both the catalog data and swap memory.

2 weeks ago 1 0 1 0
ExoFOP

If you only need one or a small subset of targets, please use the Find TIC IDs service: exofop.ipac.caltech.edu/tess/find_ti.... You can search using a TIC, TOI, KIC, EPIC, Gaia DR2, or Gaia DR3 ID, or a standard planet host or star name.

2 weeks ago 1 0 1 0