Laurence Datrier

Lecture Notes on General Relativity These notes represent approximately one semester's worth of lectures on introductory general relativity for beginning graduate students in physics. Topics include manifolds, Riemannian geometry, Einst...

I've not used them but Sean Carroll also has lecture notes available online

arxiv.org/abs/gr-qc/97...

Astro and physics folks, do you know of any good (& free) online resources for learning general relativity? I tend to do well with structured courses, even if I'm just learning on my own. But recorded lecture series, supplemental notes, suggestions for textbooks & notes, etc. would be helpful!

Been a while since I watched them but I liked Leonard Susskind's lectures on GR - pretty sure they're still on YouTube

Screenshot of Jeff Winger from community saying "I see your value now"

After having had to deal with massive intersections controlled only by stop signs, I'd like to formally apologise to every roundabout

"I could put one leg in this bubbling tar pit"

24x24” oil painting with black and white nebula (Hubble visible light). There are 5 rectangles that run horizontally across the painting. They show the nebula in orange, blue, and browns using infrared data from JWST. #ArtAdventCalendar 🐡🔭🧪

You probably have no idea what I’m painting here. It looks weird. But eventually, it will be an awesome representation of how we combine telescope data to better understand the universe!

Cat’s Paw Nebula 🐾
rectangles = infrared, JWST
black & white = visible light, Hubble (lower resolution)

I love the colours against the grey! It's gonna look awesome!

Apollo 11 Bootprint Hoodie Inspired by the iconic Apollo 11 bootprint on the Moon, we set out to get as close to the real thing as possible. This was no small step, but we did it. Meet our lunar bootprint hoodie with a true 3D imprint you can both see and feel.

Houston, the Apollo 11 bootprint hoodies
have landed 🧑‍🚀

I'm over the moon to finally have these available in my shop. They turned out so cool 🤩😭

Grab yours below and please spread the word 🙏

bit.ly/bootprint-hoodie

🔭🐡🧪🎨

Sixty Seconds of Streamside Serenity for you, today. I hope I brings you peace.

A French apple pie: it has no crust on the top and instead has slices of apple arranged in concentric circles

Happy Thanksgiving American pals! My contribution is a French apple pie

Haha, some of the people at the event were SO good though!

A colorful berry pie. The crust is painted to look like Kitt Peak National Observatory, scattered with small white telescopes and framed by colorful pie-crust stars.

Happy Thanksgiving :)
@desisurvey.bsky.social

Your photos were part of what made me excited to move to the US this year. Thank you for sharing all the beauty that's around us, and for inspiring all of us to explore more!

pixel art of a stamp featuring a purple nebula. a big purple star is shining on the top left, with a shooting star is visible next to the nebula, while smaller stars fill the space all around them

purple nebula stamp 🌌💜

[ #pixelart #ドット絵 #art #space #celestialart #sciart #cosmicart #stars #nebula ]

A woman holding surfboard freezes an incoming wave with a snap of her fingers

Luna Snow from Marvel Rivals

The water effects took ages to do but we're a fun challenge.

Arthur, from the hit PBS show of the same name, sits at a grand piano, covering his eyes with his hands and crying saying “I must have made at least fifty mistakes”

Me after every social interaction

I can't edit my post but I meant to say over twenty (🥲) years ago, not ten...

Figure drawings of people in Batman and Catwoman cosplays

Went to a cosplay figure drawing event at a comic book shop recently. I was incredibly terrible at it but it was fun to try something new! I'd only ever done figure drawing once, and that was over ten years ago.

Sorry for being a weirdo liking your old posts, I just realised I'd not seen your art in ages so I'm catching up!

Two 10x10” canvases on an easel. Left is a crystal star with pastel yellow background. Right is a crystal half moon with pastel blue background.

Crystal star & moon are almost finished! Just some highlights & background touch ups after they dry ⭐️🌙

Rectangular ceramic pendant in with a Martian landscape in red and orange. Showing a tiny Perseverance Mars rover and Ingenuity helicopter flying overhead. Attached to a sterling silver chain. More pendants in the background and some jewelry tools on the edge of the frame.

[On the bench today ⚒️ #BehindTheScenes]

I'm working on these ✨amazing✨ hand-painted #mars #rover pendants as part of my collab with celestial pottery artist @amyraehill.bsky.social 🤩

All one-of-a-kind, launching soon:
sciencesocks.co/page...

🔭🐡🧪🎨

Curious gravitational wave may be hint at primordial black holes—or just noise Astronomers approach unusual observation with caution and excitement

A couple of really nice stories about the intriguing subsolar mass candidate #S251112cm

www.science.org/content/arti... by Adrian Cho

www.iflscience.com/candidate-gr... by @drcarpineti.bsky.social

A groundbreaking discovery, or just a false alarm? Time (and more analysis) may tell

🔭🧪☄️⚛️

The milky way with large rocks in the foreground

Hi new followers! I know you're here for science art, but it's been a little while since I've had time to make art.

Here's a picture from this summer that I'd not shared before though! From Joshua tree national park. This was at the Jumbo Rocks campground, you can tell by the jumbo sized rocks

Explore the rich SciArt ecosystem on Bluesky with my SciArt Starter Pack.

Paleoart to fine art,
comics to medical illustration,
bioart to space imagery.

150 artists, plus the entire popular SciArt Feed 🐡.

And no gen AI or NFTs. 🥳

No, it's Zuru Building Bricks (way cheaper than LEGO and they're pretty decent)

They're by a company called Zuru Toys

Three lego-like assembled toys: a Polaroid camera, an old TV set with SMPTE colour bars, and an old Macintosh

I'm obsessed with these

A heavily edited close up of a rainbow, showing very faint supernumerary bands on the inside of the rainbow

Nope! But it was supernumerary - I could see some faint bands on the inside of the main bow. I edited this photo so you can sort of see them

Laika & Félicette
#art #digitalart #astronomy #artist #space

Old Glasgow Museum: Fulton's Orrery A clockwork machine on an ornate stand, with small orbs (planets) on sticks centred around a large shiny orb in the middle (the Sun) From https://www.theglasgowstory.com/image/?inum=TGSE00101

Enquiry from an 8yo asking what the Fulton Orrery planets were? Apparently the #Kelvingrove museum staff didn't know, so he e-mailed the Astronomer Royal to find out! I also didn’t know, but the AstroSociety of #Glasgow did (after watching an old VHS recording on the topic!) 🔭 #histsci 1/2🧵