Did you know? In 2025, the U.S. quarter features Vera Rubin, honoring her landmark discovery of the existence of dark matter — a tribute that perfectly coincides with the first light of the Rubin Observatory(@vrubinobs.bsky.social), celebrating her enduring legacy in unveiling the unseen universe.

Open Sesame! The ELT doors have moved for the first time. This was no small feat, as each door will weigh 650 tonnes once completed. The ELT dome & its doors will guard the telescope from the harsh conditions of the Atacama Desert. https://www.eso.org/public/videos/potw2544a/ 🔭 🧪 📹 ESO/ACe

On Sunday, humans marked 25 years of continuous presence in Earth orbit, via the International Space Station. For @sciam.bsky.social, @astrojonny.bsky.social looks at the surge of commercial space stations that might keep this trend going to 2050. www.scientificamerican.com/article/the-...

arXiv will no longer accept review articles and position papers unless they have been accepted at a journal or a conference and complete successful peer review. This is due to being overwhelmed by a hundreds of AI generated papers a month. Yet another open submission process killed by LLMs.

Are you a grad student interested in writing for Astrobites, or do you know one? We're recruiting! Apply by November 26 :) astrobites.org/2025/10/31/a...

'Astronomers' is an anagram for 'moon starers.'

HAPPY INTERNATIONAL CAPS LOCK DAY SORRY FOR OUR DELAY WE DIDN'T EVEN KNOW THIS WAS A REAL DAY.

Calling all early career scientists! The NSF NRAO invites applications for the 2026 Jansky Fellowship Program. 🚨 Application Deadline is October 22, 2025 at 11:59 pm EDT 🚨 Details and apply: https://science.nrao.edu/opportunities/postdoctoral-programs/jansky

Karl Guthe Jansky was born #OTD in 1905. A radio engineer with Bell Labs, he investigated sources of static that might interfere with communications, and thus discovered the radio emission from our Galaxy in August 1931. en.wikipedia.org/wiki/Karl_Gu...

The true cost of “solar power at night” with Reflect Orbital If you played SimCity 2000, you might've loved the idea of "beaming power from space" down to Earth. Reflect Orbital took that idea, tech-bro'd it, and now could end "night" as we know it. bigthink.com/starts-with-... #space #astro

50 million light-years away, galaxy NGC 1097 & its tiny companion NGC 1097A are locked in a galactic embrace. The bright knots around NGC 1097’s centre are thought to be large bubbles of glowing hydrogen gas about 750–2500 light-years across. www.eso.org/public/image... 🔭 #Flashback

Low Earth orbit is filling up. Not just with #satellites, but also with dangerous, tumbling debris. As they collide, they multiply. If we do nothing, satellites will crash, creating chaos on Earth below. Meet the people trying to prevent this disaster. spectrum.ieee.org/kessler-synd...

The eXTP dense matter white paper is published! eXTP is going to be a great telescope for e.g. pulse profile modeling of both rotation-powered and accretion-powered millisecond pulsars. Launching in 2030! #highenergyastro 🔭 #densematter #neutronstars ui.adsabs.harvard.edu/abs/2025SCPM...

This long-lasting meteor shower peaks in late October and is known for producing bright “fireball” shooting stars. Here’s what to know about Orionids and other major showers that will appear in 2025. www.wired.com/story/watch-...

Happy 120th birthday, special relativity! Albert Einstein introduced special relativity in the paper "On The Electrodynamics Of Moving Bodies," published in Annalen der Physik #OTD in 1905. 🧪 ⚛️ 🔭 Manuscript: onlinelibrary.wiley.com/doi/abs/10.1... English: www.fourmilab.ch/etexts/einst...

Astronomy 🔭 and physics ⚛️ GRFP applications are due Nov 14! Only seniors and 1st-year grad students can apply now (no second years).

Neutron stars are born running, and recent research explores just how fast they start off. aasnova.org/2025/09/24/k... 🔭🧪

Happy 100th anniversary to Cecilia Payne-Gaposchkin’s extraordinary thesis!

The Virtual Astronomy Software Talk series welcomes new organizers. You can learn more about VAST on our website: vast-seminars.github.io. Please apply by Oct 15 : tinyurl.com/VASTorgs #astronomy #software

The discovery of the first #exoplanets www.bbc.co.uk/sounds/play/...

“My big worry is that all this digital stuff won’t be there when we would like it to be there, or when our descendants would like to have it,” says Internet pioneer Vint Cerf. 🧪⚛️ ow.ly/s5qp50X00go

The Flame Nebula steals the spotlight in this image 🔥, but it’s not the only gem on display! You can also see the Horsehead Nebula (lower right), and the bright, bluish star to the right, which is one of the trio forming Orion's Belt. 🔭

-Style Pizza xkcd.com/3142/

Ever wonder what happened to that $100 million interstellar spaceship program? Me too. www.scientificamerican.com/article/the-...

NSF Astronomy & Astrophysics Postdoc Fellowship apps are OPEN! 🔭 However, app only appears on research.gov if your role "Proposed Postdoctoral Fellow"! Click "Proposals", "Prepare and Submit Proposals", then "Prepare New". If you do not see NSF 22-621, change role to "Proposed Postdoctoral Fellow"!

AAS Social Media Task Force The AAS is seeking members for a social media task force to strategically increase the Society's social media presence, including communicating the value of astronomy & science funding to the broader public and promoting advocacy actions. docs.google.com/forms/d/e/1F... 🔭

😲 Every patch of this image is a showstopper. 🤩 Every crop a beauty in and of itself. ICYMI, the NASA/ESA/CSA James #Webb Space Telescope captured this glittering glimpse of starbirth in the core of the nearby Lobster Nebula. 🔭 🧪

🔭 47 Tucanae: Globular Star Cluster Image Credit & Copyright: Carlos Taylor apod.nasa.gov/apod/ap25090...

#ThrowbackThursday: In 1980 the 🌍🌎🌏 was declared #smallpox free, thanks to mass vaccination efforts. Smallpox was an acute contagious disease caused by the variola virus. It was one of the most devastating diseases known to humanity. #VaccinesWork

astronomers discovered a quadruple star system: a brown dwarf dancing around another, locked in orbit with two brighter stars also circling each other 💫 the universe is so cool. www.nytimes.com/2025/08/25/s...

This is the 47 Tucanae Cluster, one of the most magnificent collections of stars in the southern hemisphere sky. Imaged last night from Melbourne Australia with an almost full moon - you can see the light pollution from the moon in the top right corner.

Light pollution is stealing our view of the stars ⭐ Protecting dark skies isn’t just for astronomers – it’s about preserving a universal right to see the cosmos. buff.ly/oTpsVCf

Mary K Gaillard, a theorist who had a knack for telling experimental physicists where to look, died in her home on May 23 at 86. Dr. Gaillard was an unpaid scientist at CERN for more than a decade, & the first woman physicist hired & tenured at Berkeley: www.nytimes.com/2025/07/31/s...

If you see this, post a #castle 🏰 Platamon Castle southeast of Mount Olympus in Macedonia, Greece. Built by the Crusaders between 1204 and 1222.

Karl G. Jansky - The Father of Radio Astronomy! 📡

It's official: A new interstellar object is currently flying through our solar system at 61 km/sec. Comet 3I/ATLAS, as it's now known, is only the 3rd known interstellar visitor, but the new Rubin Observatory is likely to find dozens more in the coming years. 🔭🧪 science.nasa.gov/solar-system...

Link to the paper: Anthony Mallama and Richard E. Cole (2025) arxiv.org/abs/2507.00107

Halictus ligatus sweat bee on an Echinacea flower.

Halictus ligatus sweat bee on an Echinacea flower.

The NSF NRAO invites scientists to participate in the Semester 2026A Call for Proposals: Very Large Array (VLA) Green Bank Telescope (GBT) Very Long Baseline Array (VLBA) High Sensitivity Array (HSA) Global mm VLBI Array (GMVA) Deadline: 30 July 2025 🔗 science.nrao.edu/observing/ca... #Astronomy

A brown-belted bumblebee feasting on milkweed nectar.

As Karen’s Doctoral thesis advisor, I’m delighted the news is finally out.

Anyway, speaking of physicists who actually are trying to make the case to the general public for why physics is worth funding, my latest @newscientist.com column is a love note to General Relativity and the Quantum Gravity Problem 😍 Ask your library if you're not a subscriber! 🧪🔭⚛️

Really cool opportunity for advanced grad students and postdocs to learn about and discuss multi-messenger astrophysics in beautiful Santa Cruz! (featuring yours truly)

NEW: The Crab Nebula—the result of a supernova in 1054—originally appeared as a bright, new star that was visible even in the daytime. Learn more about this storied supernova remnant on a poster of this observation from #NASAWebb: webbtelescope.pub/41VJ6rf 🔭 🧪

Here's a selection of illustrations I've created for science press releases over the years. Please repost for me! And if you need to commission this kind of work, check my background. I'm your man. #SciArt #spaceart

Astro job alert! 🚨🔭 @science.esa.int is hiring a Project Scientist for NASA's Roman mission, to join our ESA office here at @spacetelescope.bsky.social in Baltimore! Check out the job ad and please share with anyone who might be interested! jobs.esa.int/job/Baltimor...

The hardest part of creating a design? Posting it on social media, but anyway, here it is! Neutron stars are insanely dense,(teaspoon of neutron star would weight 4 billion tons on Earth). Some are pulsars, like beacons in space or/and magnetars! 🔭Store: kategraphiccreations.etsy.com #sciart

"The team predicts that the two neutron stars will spiral slowly toward each other in a cosmic dance, ultimately colliding in a kilonova explosion." Inspired by @skuthunur.bsky.social article & thanks to @astro-jje.bsky.social for patiently answering all my silly binary star questions! #Sciart

Jocelyn Bell and Anthony Hewish announced their discovery of a “rapidly pulsating radio source” — what we now refer to as a pulsar — with a paper in @nature.com #OTD in 1968. 🧪 🔭 ⚛️ www.nature.com/articles/217...