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ExoCTK v2026.7 and PandExo v2026.7 are now out! Highlights: • MIRI/LRS + NIRCam/DHS contamination support • Faster, more accurate NIRISS/SOSS contamination • New multistripe modes and MIRI/LRS subarrays in PandExo • Many fixes and improvements Check them out at exoctk.stsci.edu 🔭🪐 #exoplanet

New factoid shared at a meeting here at Space Telescope: #JWST's guiding is so stable that it's like flying a laser pointer on a drone in Washington DC, and pointing it perfectly at a dime (like a UK 5p coin) in San Francisco ~4000 km away.

My all-time favourite method of debugging is going to bed and looking at it again the next morning.

With this online interactive from NASA, users can type in a name and see it spelled out in Earth features found in Landsat images. We wanted to play along. 😁 Can you see STScI? Use the tool to spell your favorite space object and share it with us: https://go.nasa.gov/3QIxKF7

Looking at the AAS jobregister lately, it seemed to me that there are less positions available in all categories than in previous years. Wanting to quantify, I used the wayback machine to check on the number of postings in the January-March window and it is quite depressing.

For hunters of rocky worlds: save the date! 🔭 #astrocode We're preparing a Data Challenge modeled after the 2015 Spitzer Exoplanet Data Challenge, this time with MIRI observations from the Rocky Worlds DDT program.

Rocky Worlds DDT Data Challenge and Data Challenge Workshop — Save the Date

stsci.edu

There are lots of aspects of silicate clouds in substellar objects that we don't often think about. Luckily, Sarah Moran (@offallingstars.bsky.social) and Elijah Mullens are here to fill us in on the interesting details. #exoplanets #astronomy www.youtube.com/watch?v=XYWZ...

Head in the Silicate Clouds - Sarah Moran and Elijah Mullens

YouTube video by BOWIE+ Seminars

youtube.com

Just a few days left to apply to our ESA Graduate Trainee opportunities. You can submit your application to a maximum of three positions until 28 February. More details here 👉 https://www.esa.int/About_Us/Careers_at_ESA/Apply_now_to_the_ESA_Graduate_Trainee_Programme #ESArecruits 🔭🧪

We are hiring a new Assistant Professor in Astrophysics at Trinity College Dublin!! ☘ Job ad here: aas.org/jobregister/... Deadline: Jan 02 2026 Please share widely! 🪐🔭

Dr. Munazza Alam, an assistant astronomer at STScI, was named in The City University of New York's 50 Under 50 alumni awards in 2025. Each year the school celebrates a class of distinguished graduates who have made headway in their respective fields over the past year. 👏

Munazza Alam – The City University of New York

26 Colleges. One University.

cuny.edu

Are you an IR detectors nerd, or need to go deep into detector systematics for your #JWST MIRI science? You might be interested in this paper on MIRI's Reset Switch Charge Decay effect (RSCD) by Mike Ressler et al 🔭🧪https://iopscience.iop.org/article/10.1088/1538-3873/ae0afb

Seeking PhD candidates that want to do a thesis on exoplanet atmosphere retrieval + machine learning inference. Please apply by 31 October to Dr. Max Dax's and my shared project here: is.mpg.de/news/new-max... . Abstract for the thesis project is attached to this thread below!

New Max Planck Artificial Intelligence Network Starts Call for Applications for its Ph.D. Program

The Max Planck Artificial Intelligence Network is a Ph.D. Program that provides doctoral researchers with fully funded Ph.D. fellowships and a pool of outstanding faculty comprising directors and inde...

is.mpg.de

Can a small planet maintain an atmosphere in the blazing light of a small, cool red dwarf star? #NASAWebb and Hubble are teaming up to find out. Learn more about the Rocky Worlds program designed to understand the most common type of planetary system in the galaxy: https://go.nasa.gov/3VLUJ1n 🔭 🧪

In the event of a U.S. government shutdown, STScI will extend the James Webb Space Telescope Cycle 5 proposal submission deadline for affected scientists. Details: https://www.stsci.edu/contents/news/jwst/2025/jwst-cycle-5-deadline-extension-in-case-of-government-shutdown #NASAWebb 🔭 🧪 ☄️

Excited to share the 1st High-Level Science Product release from the Rocky Words DDT! Each RWDDT eclipse will result in HLSPs which you can use for preliminary science investigations or as a starting point for your own reduction/fit. Awesome work by Tyler Baines, Achrène Dyrek, and the RWDDT CIT 🪐🔭

MAST - Mikulski Archive for Space Telescopes@mast-news.bsky.social · 12mo ago

New HLSP: First results from the Rocky Worlds DDT program are now available at MAST! This release includes calibrated light curves, model fits, preliminary eclipse depth estimation, and auxiliary data for GJ 3929 b. archive.stsci.edu/hlsp/rocky-w... #HLSP #RockyWorlds #JWST #HST #Exoplanets #MAST 🔭

Join us tomorrow (September 10) at 11:00 EDT to learn about What's New in JWST Cycle 5! Presenters will cover policy changes, tips on proposal writing, and updates to available tools. 🔭

JWebbinar 45 - What's New in JWST Cycle 5

stsci.edu

Read the latest about JWST's Rocky Worlds Director's Discretionary Time program, including final targets and an upcoming information session: ow.ly/mgxA50WReQt

The Rocky Worlds DDT has published our final target list. Join us for an information session on September 15 to learn more about the 9 targeted planets and the goals of the program. 🔭 #exoplanets

Rocky Worlds DDT Updates: Final Target List and Virtual Information Session

stsci.edu

STScI is now accepting applications for the Giacconi Fellowship in astrophysics. Start date is Fall 2026 and funding is available for 3 years. More info here: www.stsci.edu/stsci-resear...

Giacconi Fellowship

Learn about the requirements for STScI’s Giacconi Fellowship, which recognizes postdoctoral researchers in astronomy, astrophysics, and planetary science.

stsci.edu

“Our results confirm that there is no statistical significance for DMS or DMDS in K2-18 b's atmosphere. … we estimate that ~25 more MIRI transits would be needed for a 3-sigma rejection of a flat line relative to DMS/DMDS features ….” arxiv.org/abs/2505.13407

Insufficient evidence for DMS and DMDS in the atmosphere of K2-18 b. From a joint analysis of JWST NIRISS, NIRSpec, and MIRI observations

Recent JWST observations of the temperate sub-Neptune K2-18 b have been interpreted as suggestive of a liquid water ocean with possible biological activity. Signatures of DMS and DMDS have been claime...

arxiv.org

Upcoming JWebbinar on Exoplanet Time Series Observations, special MIRI edition! The @spacetelescope.bsky.social #JWST MIRI team has some great transiting exoplanet experts (including @taylorbell275.bsky.social) and they will be presenting this JWebbinar - registration details below.

JWST Observer@jwstobserver.bsky.social · last yr.

Registration is now open for the next #JWST JWebbinar – Exoplanet Time-Series Observations with MIRI: From Pixels to Transit/Eclipse Light Curves to Results  – to be held on May 5th. Get the details: ow.ly/r0VK50VxvbB

Hey, artists, in case you were wondering if your work matters: I'm a scientist working on climate change and biodiversity, and I would not be who I am today without The Lorax, The Secret of NIMH, Watership Down, The Last Unicorn, and The X-Files. I know I'm not alone. Thank you for all you do.

Literally moments away from being safely transported to Maryland on a big auto transport truck, our car got rear ended while stationary... Thankfully still drivable and en route to Maryland, but really not what we were hoping for today... 🚗 💥 🚗

Proud to see the special collection of Transiting Exoplanet Community Early Release Science papers out (all open-access)! www.nature.com/collections/... This has been such a whirlwind of effort over the last few years, with a great team - it's hard to even imagine the pre-JWST era now.

Excited to share that on Jan 27th I'll be starting at @spacetelescope.bsky.social as an ESA/AURA Astronomer on the JWST/MIRI team! Thrilled to be joining an amazing group of people where I'll spend 50% of my time on support work (including supporting the Rocky Worlds DDT 🪐) and 50% on research 🔭

Exoplaneteers! The leads of the @spacetelescope.bsky.social Rocky Worlds program with Hubble and JWST will be providing an update for the community on Jan 21st at 11 am Eastern Time. You're encouraged to submit your questions ahead of the event. More info here > www.stsci.edu/contents/new... 🔭

Rocky Worlds DDT Information Session Coming Soon

stsci.edu

Happy to announce v1.0 of Eureka! for JWST time-series observations, with bug patches and new features. We made several backwards-compatibility breaking changes to make the pipeline easier to use and easier to maintain. Please check out the new version github.com/kevin218/Eur... 🔭🪐

Release v1.0: Major release that breaks backward compatibility in favor of simplicity and efficiency · kevin218/Eureka

What's Changed Calibrated MIRI spectra by @kevin218 in #585 Accounting for light travel time in starry model by @taylorbell57 in #587 Logging Eureka! version and CRDS pmap by @taylorbell57 in #581...

github.com