Chris Nelson

@chrisnelsonsdog@mstdn.social
1,013 Followers
953 Following
443 Posts
Socially awkward penguin, rollin' hard in the land of fediverse chicks and reply guys.

I decided to take advantage of yesterday's rainy/cooler weather and visited #Shenandoah National Park. I hiked the Rose River Falls loop and the Bearfence Scramble. The weather was perfect – very foggy and slightly drizzly. And the waterfalls were gushing from the recent rainfall!

Rose River Falls is one of my favorites in the park. It’s not too easy or too hard, and it follows the river most of the time so you can constantly hear the gorgeous rushing water. Plus it always has the coolest mushrooms. It’s also a sentimental hike for me, as its the one I did the day my grandmother passed away. I’ve hiked it countless times, and it never gets old.

Bearfence is a short trail, only a mile long, but it has a ton of super fun rock scramble. As adults we don’t get to climb nearly enough, and you forget how fun it can be! The summit has a beautiful 360 degree mountain view, though it was completely obfuscated by the fog yesterday. I like tacking this one on to my day when I do shorter hikes in the park, to add a little more mileage and some fun.

#hiking #nature #naturephotography #waterfall #fog #river #amateurphotography

Lucky enough to have a bit of a breeze blowing at the moment, so have been doing some gardening. Finished up with the usual chasing bees around with the camera. It's a hobby.

#photography #bloomScrolling #bees

An Art Nouveau style Peacock on top of a building on Buchanan Street in Glasgow. It was created by Alan Dawson in the late 1980s as part of the rennovation of the former Prince of Wales building, designed by John Baird and built in 1854, which now contains the Princes Square shopping centre.

#glasgow #buchananstreet #peacock #artnouveau #princessquare #sculpture #publicart

Silbury hill is just amazing

Ooh, I actually have something for #ShowMeYourKnits!

This week, the prompt is garter stitch, and I'm still really enjoying the meditative nature of the ten stitch twist blanket!

#KnitLove #Glimmers #KnittingIsMeditation

Hi, there! The smaller hermit crabs climb easily on a vertical coat of algae growing on the silicone sealing of a tank. (And in the wild, on the algae that grows on everything.) Those needle-sharp "toes" are tough, the leg muscles strong. #VancouverIsland #HermitCrabs #IntertidalInvertebrates #Invertebrates #MarineLife #DailyHermit
morning no.2
Currently blooming in my garden (6B, USA): hollyhocks, brown eyed susans, echinacea, sweet william…
#bloomscrolling #gardening #flowers
×

New instance, new #introduction !

Hi #fediverse ! We’re the European Southern Observatory, and we design, build and operate ground-based telescopes.

One of them is our Extremely Large Telescope, currently under construction in #Chile. It will have a 39 m mirror, and its rotating enclosure will weigh 6100 tonnes, or about 700 mastodons!

We’re looking forward to chatting with all of you about #astronomy

And many thanks to @sebinthestars for running our former instance!

📷 ESO/G. Vecchia

@esoastronomy Welcome, again!

You weren't able to migrate your followers to the new instance? I've never moved myself but I was under the impression that while you can't take your old posts with you, you could take your follows and followers.

@spacelizard Hi Anthony! They show up on our end: 3.4k followers, very close to what we had in astrodon, probably a few remain to be moved. Maybe this information takes a bit to be replicated in other servers.
@esoastronomy @spacelizard Small instance owner here: Some of those followers might be homed on instances that are no longer active.

@esoastronomy That's good.

When I view your profile it only looks like you have 33 followers, and I didn't appear to be following you at the new instance so manually re-followed. Glad to hear that you haven't lost 99% of your followers!

@esoastronomy Ah, looks like I'm only seeing your followers that are on the same instance as me. Maybe just a delay in the propagation of information between servers, like you said.
@spacelizard @esoastronomy Usually it takes some days until you can see all followers.
@spacelizard @esoastronomy as someone that follows you both, I can confirm I am now following in the new instance
@esoastronomy @spacelizard The migration worked from my end at least.
@esoastronomy welcome. On my end it appears you have 1.2k followers. Out of curiosity what was the rationale for switching to one of the most crowded instances?

@WuMing2 I am also curious, as we have many scientific instances.

@esoastronomy

@NatureMC I can answer that. Astrodon is shutting down: https://astrodon.social/@sebinthestars/114595973387772639
Seb Potter (@sebinthestars@astrodon.social)

After two and a half years of building this community, I've made the decision that it's time to shut down Astrodon.social. Since 2022, around 4,000 users have registered on astrodon.social. However, fewer than 10% of those users are active each month, and fewer than 1% post regularly. Because of the way Mastodon works, the data for every one of the those users, even the inactive ones, has to be kept forever and keeps on growing. There's no way to remove posts or archive them out of the database, and running a large database gets very expensive. Running Astrodon costs more than €300/month, which means that the costs of running the server are primarily going toward servicing fewer than 50 active users, the most active of whom are organisations. Even with donations, Astrodon has now cost me more than €5000 to run. While I’ve considered the option of turning Astrodon into a commercial service or creating a nonprofit, I’m reluctant to go down that route. Managing a business comes with a host of overhead tasks like tax reporting and navigating different tax regimes due to our global user base, which is something I want to avoid. My goal has always been to create a free and open space, but the reality is that the free part isn't sustainable. I'm not shutting down Astrodon immediately. I want to give everyone ample time—likely over the next two to three months—to find alternative service providers and transition smoothly. This isn't a decision I'm making lightly, and I appreciate your understanding and support as we navigate this transition. If you have any questions, concerns, or suggestions, please feel free to reach out to me directly through DMs.

Astrodon - The Astro Community
@WuMing2 Thank you!
@NatureMC @WuMing2 Indeed, and Seb has done a fantastic job running that instance!
@esoastronomy @sebinthestars can't wait to see what this big girl can do.
@esoastronomy "[…] or about 700 mastodons!"👀 What do you mean? African or European mastodons❓
@sebinthestars
@ojelabii @sebinthestars We assumed 8 - 9 tonnes, so kind of average 🙂
@esoastronomy @sebinthestars welcome! I write schedulers for robotic telescope networks (Las Cumbres) and satellite constellations (Capella).
@slampoud @sebinthestars Both ground-based and space facilities, exciting job!

@esoastronomy @sebinthestars I did LCO's scheduler as a postdoc 10 years ago. Capella was an industry job, from which I've recently departed.

The optimization math is the same, integer linear programming.

Now on the job hunt, looking for the next complex instrument that needs that kind of thing to reach its potential :)

@esoastronomy
Welcome to this new instance and mad propz for providing your telescope mirror's weight in mastodons!

@esoastronomy @odd @sebinthestars

Hope you share new public domain images captured with this new telescope.

@almino @odd @sebinthestars Yes, we can't wait to share with all of you the wonders the ELT will see! In the meantime, enjoy our archive, full of images taken with our other telescopes: https://www.eso.org/public/images/
Images

Images

@esoastronomy @sebinthestars "Very Large Array" "Extremely Large Telescope" "Large Hadron Collider"

I love the scientific talent for understatement - may I propose for the next enormous structure "Inconveniently large telescope" ?

@mbybee @sebinthestars We're just working our way down this list 🙂 https://xkcd.com/1294/
Telescope Names

xkcd

@esoastronomy @sebinthestars
A 39 METER mirror.

I'm so old, I remember when the transport of the Mt. Palomar's Hale Telescope's 1.2m mirror was one of the wonders of technology. It's transport up the mountain had photos in most newspapers.

This project is far more than 32.5x more amazing!!!!!

@Benhm3 We feel you! Our first telescope at La Silla Observatory had a 1 m mirror. The ELT will have 798 hexagonal segments, each 1.5 m wide, working together as a huge single mirror.

@esoastronomy

Do the mirrors move in absolute synchrony (to remove the twinkle) or is each mirror moving itself to put whatever wavelength in-phase at the instrument?

Or some other thing I know nothing about...not an astronomer.

@Benhm3 Atmospheric turbulence will be corrected with two other mirrors: the M4, which is a flexible mirror that can deform 1000 times per second, and the M5, a flat mirror that will tip & tilt to stabilise the image (also against vibrations due to wind or the telescope itself). You can find more details here: https://elt.eso.org/telescope/adaptiveoptics/
Adaptive Optics | ELT | ESO

The Extremely Large Telescope: The World's Biggest Eye On The Sky

@esoastronomy @sebinthestars So excited to watch this facility come together!!
@esoastronomy @sebinthestars You folks sound like really cool cats!
@kimlockhartga We are! Our telescopes even have lasers to play with cats on other planets 🐱
@esoastronomy okay, I'm definitely following now. 😃 I love all things astro: astronomy, astronauts, astrophysics, the dog Astro . . .
@esoastronomy @sebinthestars will it be 100% solar powered? If not call me XD
@esoastronomy @sebinthestars Hi, will operation software for data processing pipeline be open source? if yes, please share the link 
@sharlatan @sebinthestars Yes, they'll be public. Here you can find the pipelines for our current instruments: https://www.eso.org/sci/software/pipe_aem_main.html
ESO - Instrument Pipelines Page

ESO is the European Organisation for Astronomical Research in the Southern Hemisphere. It operates the La Silla Paranal Observatory in Chile and has its headquarters in Garching, near Munich, Germany.

@esoastronomy @sebinthestars
Would you be interested in boosting some #reproducibility with #guix ?

Currently there are 200+ most popular Astro related software projects nicely packaged and being refreshed monthly

https://codeberg.org/guix/guix/src/branch/master/gnu/packages/astronomy.scm

Some related topics from Software Heritage and reproducible research in medicine science

https://mstdn.social/@swheritage/114710122362716213

https://social.edu.nl/@the_dr_leonardo_lenoci/114687221745581237

https://social.sciences.re/@zimoun/114665981535142497

https://scholar.social/@khinsen/114715617341258624

Publications
https://guix.gnu.org/en/publications/

guix/gnu/packages/astronomy.scm at master

guix - Transactional package manager, declarative GNU/Linux distribution, reproducible deployment tool, and more!

Codeberg.org
@esoastronomy Hello from a tech at the Mt. Wilson Observatory!

@esoastronomy @sebinthestars

I was confused, earlier this week, about which new telescope in Chile had just reached #FirstLight

You will have a lot of things to look at.

@esoastronomy @sebinthestars

I have been checking, and this, the existing ESO telescopes, and the Vera Rubin, are at roughly the same altitude. The altitude would be worth including in Alt texts, from some angles this isn't as obvious a summit as some are.

@Wolf_Baginski Yes! We're really excited to follow-up sources found by @VRubinObs

@esoastronomy @sebinthestars space + alt text. You will be most welcome here.

Excited to hear more about this project!

@esoastronomy @sebinthestars another good science account to follow!

@esoastronomy @sebinthestars

700 mastodons, only 1 instance.

You're welcome! (Again)

@esoastronomy @sebinthestars Look forward to what you'll share here!

Perhaps you know this already, but if not then, Mastodon has the ability for accounts to verify who they are by way of their domains (in your case esa.org). Think of this as Mastodon's version of the blue checkmark from other platforms.

It is easy to set up, and would signal to everyone that your account is in fact the official ESA account.

https://joinmastodon.org/verification

Verification

Learn how to get verified on Mastodon