Today is the December solstice at 15:03 GMT/16:03 CET. This @eumetsat.int MTG‑I1 image from 19 December 2025, 06:00 GMT, shows Earth’s day–night terminator tilted near its annual maximum of about 23.5°.

Very excited to be speaking at the Liberty Science Center in the 'Space Talk' series on Jan. 22 on the Cosmic Microwave Background (CMB) and Adele! Get tickets at the link below. lnkd.in/eJVEW-aP

wow, what a title !!! Rutgers University feature on me + GRB 250702B! It was so nice to work with Kitta on this. Hope you enjoy the read ! 🧪🔭👩🏼‍🔬☄️🦖 www.rutgers.edu/news/astroph...

I am so elated to share with you the NASA press release on the mysterious GRB 250702B! It features comments from me about our JWST/NIRCam imaging, which Alyssa Pagan at @stsci.edu made a beautiful compilation of for you to see. Please read to learn more !!! 🧪🔭☄️👩‍🔬🦖 science.nasa.gov/science-rese...

My dad abhors any negative comments about immigrants. Asked him recently why he’s so strong on it: ‘Because we’re always happy to take the rich and clever ones. Which means it’s not about disliking immigrants. It’s about disliking the poor and vulnerable. And that’s a bad human instinct.’

Nancy Grace Roman telescope is out of the thermal vacuum chamber and getting ready to launch in 2026

Detour Road, North Wangaratta. #AuroraAustralis #Aurora

Celebrating the 20th anniversary of the Southern African Large Telescope 🔭

Thrilled to have two years' of work out, in a pair of papers led by @gradientrider.bsky.social and @maxecharles.bsky.social. We've built a data-driven calibration of the James Webb Interferometer to near its fundamental limits for high-res imaging - explainer at @aunz.theconversation.com!

The petition link is in the article - if you’re in the local DMV community you can sign for support!

Right now, academic freedom is under attack in the United States. Actually, "under attack" undersells it. "Existentially threatened" is better, along with "already lost in many places."

Come for the fascinating historical poetry about exploding stars, stay for the excellent technical footnote about what different communities are referring to when they talk about “type Iax” supernovae.

A nice write-up of the new @cunygc-astro.bsky.social CUNY-Rutgers-Columbia partnership around Rubin LSST!! 🔭

Congratulations to OzGrav's Deputy Director, Professor Tamara Davis AM, recipient of the 2025 Moyal Medal awarded by Macquarie University for her outstanding contributions to astrophysics and cosmology. Read more here: lighthouse.mq.edu.au/media-releas...

Tip of the Red Giant Branch Distances to NGC 1316, NGC 1380, NGC 1404, & NGC 4457: A Pilot Study of a Parallel Distance Ladder Using Type Ia Supernovae in Early-Type Host Galaxies. Max J. B. Newman et. al. https://arxiv.org/abs/2508.20023

An image I made quite a while ago finally got published in a multi-image press release at the Chandra website today. HST, Chandra, VLA, and JWST data all in one. flic.kr/p/2qb3dUX chandra.si.edu/photo/2025/c...

very cool new result led by Steve Schulze focused on SN2021yfj - the first of a new supernova subclass, Type Ien (“one - e - n”). This star lost its H, He, & C layers, and shows strong emission from the inner S + Si layers !! Check out his Science Friday interview about this science! 🧪🔭☄️

My favorite galaxy. Spot the difference between this image and my profile pic. #SN1998bu #M96

#NASARoman’s High-Latitude Time-Domain Survey will find exploding stars that act as signposts to measure the universe’s expansion and the influence of dark energy. (1/6) 🧵 🔭 🧪

📷 This NASA/ESA #Hubble image shows spiral galaxy NGC 1309, with its bluish stars, brown gas clouds and white centre, as well as hundreds of distant background galaxies (nearly every smudge, streak and blob is an individual galaxy!)🧪🔭 @stsci.edu @science.esa.int 🔗 esahubble.org/images/potw2...

📣📣 BOOK NEWS 📣📣 I'm excited to share the cover and release date of Book #2, #EdgeOfSpaceTime, which is now available for PREORDER!! You can order from ANY bookstore, including your local indie! More details on preordering here: www.penguinrandomhouse.com/books/746817... What's the book about? 🧵

Talk about The Wire, Sopranos, Game of Thrones all you want, but the greatest US television program ever made is Sesame Street. It's not even close. 50+ years of treating kids across class, ethnicity, religion not as mini-consumers...but as citizens with a stake in this world.

An absolutely monumental piece from @polgreen.bsky.social this morning. Appreciate the research, array of sources, and nuanced thinking on the complicated issue of migration. Gift link: www.nytimes.com/2025/01/31/o...

Happy birthday to #astronomer Henrietta Swan Leavitt (1868-1921) who set the scale of our Universe. 🧪🐡👩🏼‍🔬🎢🔭#histsci Behind her in my portrait is a line showing stellar luminosity (capital L with subscript sun-symbol, a circle with a dot) as a function of time (t). She is printed over constellations 🧵

Introducing...your sneak peek at the cosmos captured by NSF–DOE Vera C. Rubin Observatory! Can you guess these regions of sky? This is just a small peek...join us at 11am US EDT for your full First Look at how Rubin will #CaptureTheCosmos! 🔭🧪 #RubinFirstLook ls.st/rubin-first-look-livestream

Welcome to a new era in astronomy and astrophysics ✨🔭🧪 Get ready to join us virtually for the reveal of Rubin's first images! #RubinFirstLook 🗓️ June 23, 2025 ⌚️ 11am US EDT 🔗 ls.st/rubin-first-look-livestream

Better save a copy of this now

Delighted that the first paper from our Cy2 JWST program was published today, reporting the discovery of molecular hydrogen in the 3% Solar metallicity galaxy Leo P. This was a very fun project with @karinsandstrom.bsky.social strom.bsky.social and fabulous co-authors! www.nature.com/articles/s41...

If you are interested in supporting NASA science and exploration, and saving it from capricious budget cuts, here's one thing you can do: sign this petition being sent to Senate and House members of their respective appropriations committees. Two days left to sign! www.planetary.org/advocacy-act...

The STScI Town Hall at #AAS246 was the ultimate prep guide for Roman launch 🚀 We got the scoop 🍨on data products, community analysis tools, the Roman Science Collaboration, core community survey designs, and more. Roman’s coming— are you ready?! 🔭☄️

The @nsf-@doescience Rubin Observatory will take so many pictures of supernovae, they'll feel like POP stars 💥🤩 Rubin will observe millions of Type Ia supernovae, allowing scientists to calculate the distances to their galaxies and map our Universe🌌 🔭🧪 youtu.be/Gw7CBUjsHV8

Bihar se.

"Masked security forces captured an opposition leader in the coastal province of New Jersey as regime officials continue their months-long crack-down against pro-democracy elements in the embattled United States. The arrest comes as the regime issued calls for summary detentions without trial."

Exclusive: National Science Foundation staff were told today that the agency’s 37 divisions—across all eight directorates—are being abolished and the number of programs within those divisions will be drastically reduced.

Launched into orbit 35 years ago, Hubble remains one of the most valuable pieces of technology in our search for information about the universe. Credit: NASA Goddard Space Flight Center, ESA, and STScI. 🔭 🧪

May edition of @astronomymag.bsky.social has an AMAZING image of the Perseus Galaxy Cluster made by community observers! The composite represents 392 hr of total exposure time across 19 imagers with apertures between 2.7 to 11 inches. Credit to @lislisette.bsky.social and the Overall Photons team!

Talk about a double whammy! Baby and big science result in the space of 10 hours - great work, Blakesley Burkhart www.nj.com/news/2025/05... 🔭

The Nancy Grace Roman Space Telescope observing program is going to be amazing. Can't wait. #NASARoman @nasaromantelescope.bsky.social www.nasa.gov/missions/rom...

Hubble has spent 35 years in orbit! 🥳 Celebrate with an array of compelling images recently taken by Hubble: Mars, dramatic views of stellar birth and death, and a magnificent spiral galaxy: bit.ly/4jjsAs7 🔭 🧪

🔭 NGC 4414: A Flocculent Spiral Galaxy Image Credit: ESA/Hubble & NASA, O. Graurlweb.cfa.harvard.edu/~orgraur/), S. W. Jha, A. Filippenko apod.nasa.gov/apod/ap25040...

!!!!! a very familiar field @sublunar.bsky.social

Hubble is celebrating its 35th birthday this month 🚀🎂, and @esa.int will be releasing a series of new and newly-processed images to mark the occasion - here’s the first! Follow @esa.int, @science.esa.int & @chrisinbaltimore.bsky.social for more #Hubble35 goodies! 🔭 #50YearsOfESA

🎶 “so make the friendship bracelets, take the moment and taste it” 🎶 I’m at the “Celebrating 20 Years of Swift Discoveries” conference & to make nod to another famous Swift, I made friendship bracelets to share! It’s been a very fun way to introduce myself and bring some joy. :) 🔭🧪☄️ #womeninSTEM

great article and kudos especially for taking the time to respond clearly and positively to questions/misconceptions in the comment section

Here's a little Friday Pi-day treat for the daytime crowd, now that I've had some sleep. #Seestar S50 🔭🧪 #eclipse

Continuing the Muppets theme at #TFS25, Saurabh Jha ends his keynote talk with a reminder on why supporting our community and why outreach is so very important for astronomy. 🌈 🔭🧪

Sometimes the data doesn't want to speak and you have to get creative... 🧪🔭

The kids (who happen to be my wonderful niblings) are all right

a slight silver lining to dark clouds ahead