Gijs D Mulders @gijsmulders.com · 23/09/2026A great thread on rocky (exo) planets with awesome graphics for the #exoplanets feed 0132
Reposted by Gijs D MuldersPaul Byrne @theplanetaryguy.com · 23/09/2026I said I'd do a thread about my new Space Science Reviews paper, so here it is! This is part of a collection of papers arising from a meeting at the International Space Science Institute in Bern in 2024: a workshop to better understand rocky extrasolar planets. A 🧵: 220055
Reposted by Gijs D MuldersSeven Machina Rasmussen @toomanyspectra.bsky.social · 19/07/2026ever wonder: 🛸 are aliens real? ☀️ is our solar system unique? 🌍 how can we tell if there’s life on another planet? 📈 should we destroy capitalism? 🧑🔬 how could i become an astrobiologist? CLOUDY WITH A CHANCE OF STARSHIPS has the answer! www.barnesandnoble.com/w/cloudy-wit...barnesandnoble.comCloudy with a Chance of Starships: How the Drake Equation Reveals the Odds of Life in the CosmosBarnes & Noble’s online bookstore for books, NOOK ebooks & magazines. Shop music, movies, toys & games, too. Receive free shipping with your Barnes & Noble Membership. 11911
Reposted by Gijs D MuldersJoanna Drążkowska @astrojoanna.bsky.social · 22/07/2026Our latest paper has been accepted for publication! 🎉 We demonstrated that a single late infall event perturbing the outer disk can trigger the formation of multiple giant planets and ringed disk structures resembling those observed around young stars. Paper: arxiv.org/abs/2607.18370 14513
Reposted by Gijs D MuldersInstitute of Astrophysics UC @astrouc.bsky.social · 07/07/2026🔭 Applications are now open for the Doctoral and Master Program in Astrophysics at the Institute of Astrophysics UC. 🌌 Research excellence across galaxy evolution, exoplanets, cosmology, stellar populations & more 💰 Full scholarships & stipends for all admitted students 📅 Deadline: July 31, 2026 011
Reposted by Gijs D MuldersSeven Machina Rasmussen @toomanyspectra.bsky.social · 03/07/2026here you go!! 08334
Reposted by Gijs D MuldersBibiana Prinoth @handle.invalid · 26/06/2026Last week, I uploaded my first first-author paper as Dr. Prinoth to arXiv, and I finally have time to tell you about it. This one has been a long time coming, and I'm incredibly happy and proud that it's finally out in the #exoplanets world! 🔗 arxiv.org/abs/2606.14490 1/narxiv.orgA population view of transiting hot giant exoplanets: Tracing Fe and Ti chemistry with ESPRESSO and MAROON-XHot and ultra-hot Jupiters offer a unique laboratory to study atmospheric chemistry at the population level using ground-based high-resolution spectroscopy. Fe and Ti are key tracers of thermal and ch... 1276
Reposted by Gijs D MuldersSean Raymond (planetplanet.net) @planetplanet.bsky.social · 20/05/2026I love this new paper about planets in AGN disks around supermassive black holes! arxiv.org/abs/2605.19241 Naturally, it also helps to motivate some of the crazy planetary systems I've built: planetplanet.net/2018/06/01/t...arxiv.orgActive Galactic Nucleus Tori: Potential Birthplace to Millions of PlanetsThe outer regions of AGN disks have temperatures similar to those of circumstellar disks, permitting dust condensation. Therefore, planet formation and growth could be active in these dust tori throug... 4289
Reposted by Gijs D Muldersastronomie.nl @astronomienl.bsky.social · 13/05/2026Masterstudent UvA ontdekt ‘amandelvormige’ exoplaneet op rand van uiteenvallen www.astronomie.nl/nieuws/maste... 043
Reposted by Gijs D MuldersSteve Desch @deschscoveries.bsky.social · 08/05/2026New HR diagram mnemonic dropped: Very Bad Computer Program Gives Me Misinformation 0161
Reposted by Gijs D MuldersLinn Boldt-Christmas @nplinnspace.bsky.social · 07/05/2026🔭 A cautionary tale for undergrads (and above!) using AI for #astro plots: our BSc student wanted to make a "quick" HR diagram showcasing M-dwarfs & thought some chatbot could make one and... well... ...extra credits are now offered to students who can correctly find all errors on cursedHR.png 🫠 🧪 4827580
Reposted by Gijs D MuldersDavid Kipping @davidkipping.bsky.social · 30/04/2026Fund NASA science or we’re demoting it again to comet. 1298
Reposted by Gijs D MuldersMatthew Kenworthy @mattkenworthy.bsky.social · 29/04/2026Casassus+ on Hourly radio variability of PDS70c from time-differential photometry using the ALMA array to see fluctuations around this exoplanet and circumplanetary disk. Very cool to see how quickly this flux can change! #astrodon #exoplanets 073
Reposted by Gijs D MuldersKevin Hardegree-Ullman @kevinkhu.bsky.social · 01/04/2026New research note accepted to RNAAS! Yes, this is a serious science post today. 🧪 We've created a catalog of Gaia DR3 IDs that correspond to TESS Input Catalog IDs! No more cross-matching on your own or hoping the Gaia DR2/DR3 IDs are the same! arxiv.org/abs/2603.28850 🔭 #exoplanetsarxiv.orgGaia DR3 IDs for TESS Input Catalog TargetsThe TESS Input Catalog (TIC) was built on Gaia Data Release 2 (DR2). To date, there has not been an update to the TIC to incorporate Gaia Data Release 3 (DR3) IDs. In this Research Note, we outline ho... 1215
Reposted by Gijs D MuldersRandall Munroe @xkcd.com · 23/03/2026Star Formation xkcd.com/3222/ 282525301
Reposted by Gijs D MuldersDaniel Apai @danielapai.bsky.social · 13/02/2026What if Earth-sized HZ worlds don’t have exactly Earth-like climate feedbacks? Climate Chaos, Snowballs, run-aways - but also many temperate yet not-Earth-like worlds! Congrats to Chaucer Langbert on this cool study! arxiv.org/abs/2602.10369 @uarizonalpl.bsky.social @stewardobservatory.bsky.socialarxiv.orgNot Earth-like Yet Temperate? More Generic Climate Feedback Configurations Still Allow Temperate Climates in Habitable Zone Exo-Earth CandidatesEarth's climate is influenced by over a dozen feedbacks, but only three dominate its long-term climate behavior. Models of the exoplanet habitable zone (HZ) assume that this is similar for other Earth... 0104
Reposted by Gijs D MuldersDr. Emily Gilbert @emdwarf.bsky.social · 10/01/2026It's happening!!! Pandora is going to space in just over 16 hours (if all goes well). Pandora is going to help us study exoplanet atmospheres, even when their host stars are misbehaving. I am headed up to Vandenberg to watch the launch shortly, and will make a thread about the mission/launch here! 79823
Reposted by Gijs D MuldersEmily Hunt @emily.space · 19/12/2025Ever wondered how many bins to choose when making a histogram of data? The answer is that you shouldn't choose a number of bins yourself! ☄️ #astrocode Here's a little notebook explaining how to make less biased histograms:gist.github.comMaking histograms is a common way to estimate the true density distribution of a sample. But how can we choose the number of histogram bins? And if we get fancy and use kernel density estimation (KDE)...Making histograms is a common way to estimate the true density distribution of a sample. But how can we choose the number of histogram bins? And if we get fancy and use kernel density estimation (K... 98925
Reposted by Gijs D MuldersDennis Just 🌵 @sciencepolice.bsky.social · 18/12/2025I'm very happy I woke up at 4am this morning to catch 3I/ATLAS right before its closest approach to Earth (today!) This interstellar visitor is traveling over 60 km/s ☄️ At 269 million km (1.8 AU), I took a series of 2.5 min exposures with my Seestar 🔭 1134
Reposted by Gijs D MuldersBibiana Prinoth @handle.invalid · 17/12/2025The application for the ESO Summer Research Programme 2026 has just opened! It‘s a six week programme in Garching close to Munich where pre-Ph.D students can work on a hands-on project. Working at @eso.org is a fabulous experience, so please help me spread the word ✨ 🔗 eso.org/sci/meetings...eso.orgESO - SummerResearch2026ESO 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. 0811
Reposted by Gijs D MuldersSeven Machina Rasmussen @toomanyspectra.bsky.social · 13/12/2025the day is finally here: you can order my debut non-fiction, CLOUDY WITH A CHANCE OF STARSHIPS: HOW THE DRAKE EQUATION REVEALS THE ODDS OF LIFE IN THE COSMOS from B&N!! www.barnesandnoble.com/w/cloudy-wit... 34113
Reposted by Gijs D MuldersSera Markoff @profsera.bsky.social · 11/12/2025⭐️✨🔭Please help us get the message out about the 7th annual international ASPIRE program at @api.uva.nl. This summer 2026 school provides astronomy research experience for talented MSc students from countries where opportunities to move into a PhD program are limited. Applications are due 17 Dec! ⭐️✨🔭aspire.science.uva.nlASPIRE 069
Gijs D Mulders @gijsmulders.com · 09/12/2025Equating giant planet occurrence rate of ~20% to the disk fraction, that means a timescale of ~10 Myr for giant planet formation! 040
Reposted by Gijs D MuldersEmily Hunt @emily.space · 09/12/2025New paper led by Fabian Polnitzcky & with @sratzenboeck.bsky.social + @joaoalves.bsky.social: based on the ages of stars with infrared excess in Sco-Cen, it seems planet-forming disks last around twice as long as previous estimates suggest - giving twice as long for planets to form. 🔭☄️ #exoplanets 1279
Gijs D Mulders @gijsmulders.com · 19/11/2025Question for the #exoplanets crowd: Does any one know where to find an updated version of this plot? I'm looking for the "standard" exoplanet mass vs. semi-major axis plot, but with an overlay of which planets have a spectroscopic measurement of their atmosphere wasp-planets.net/2020/09/29/w...wasp-planets.netWhich exoplanets do we have atmospheric spectra for?Here’s an interesting plot created by Zafar Rustamkulov (@exoZafar), a PhD student at Johns Hopkins University. He has added up all the exoplanets for which we have either transmission spectr… 2143
Reposted by Gijs D MuldersIlaria Pascucci @pascucci.bsky.social · 05/11/2025Enjoyed giving a UofA Origins talk on how protoplanetary disks evolve – featuring new results from ALMA and JWST. The recording is available here 👇 youtu.be/mdgGgnjVbb0 @uarizonalpl.bsky.social @stewardobservatory.bsky.socialyoutu.beProtoplanetary Disk Evolution in the ALMA–JWST Era (Ilaria Pascucci, UArizona/LPL)YouTube video by Origins Seminars 092
Reposted by Gijs D MuldersEric Mamajek @ericmamajek.bsky.social · 05/11/2025Big congrats to Jennifer Burt, Xavier Dumusque, and Sam Halverson on finishing their epic (instant classic) Annual Reviews of Astronomy & Astrophysics article "Precise Radial Velocities"! arxiv.org/abs/2511.01954 contains some great new graphics for talks on #exoplanets #EPRV #DopplerSpectroscopy 1213
Reposted by Gijs D MuldersKevin Hardegree-Ullman @kevinkhu.bsky.social · 16/10/2025The NASA #Exoplanet Archive now has Gaia DR3 IDs! This should hopefully make your work and planning observations easier! exoplanetarchive.ipac.caltech.edu 0305
Reposted by Gijs D MuldersTim Lichtenberg @timlichtenberg.bsky.social · 13/10/2025w/ Oli Shorttle, @johannateske.bsky.social & Eliza Kempton we reviewed our current understanding and prospects for peaking on the inside of small #exoplanets in "Constraining exoplanet interiors using observations of their atmospheres": www.science.org/stoken/autho... & arxiv.org/abs/2510.08844 🔭🧪⚒️☄️ 03311
Gijs D Mulders @gijsmulders.com · 08/10/2025How do giant planets influence the type of #exoplanets that form in the habitable zone? A thread 1/🧵 13613
Reposted by Gijs D MuldersAndrás Gáspár @andrasgaspar.bsky.social · 29/09/2025Our paper on the JWST/MIRI observations of the epsilon Eridani system, led by Dr. Schuyler Wolff, were published today! This is the last of the Archetypical Disks in our MIRI Survey, after Fomalhaut and Vega. Just like for those disks, our MIRI images reveal an extended inner asteroid disk! 2335
Reposted by Gijs D MuldersJonathan Fortney @jjfplanet.bsky.social · 26/09/2025I'm really excited about this one! It's fantastic working with Dr. Yayaati Chachan: arxiv.org/abs/2509.20428 "Revising the Giant Planet Mass-Metallicity Relation: Deciphering the Formation Sequence of Giant Planets" Lots of great nuggets her, including that even super-Jupiters are very metal-rich.arxiv.orgRevising the Giant Planet Mass-Metallicity Relation: Deciphering the Formation Sequence of Giant PlanetsThe rate at which giant planets accumulate solids and gas is a critical component of planet formation models, yet it is extremely challenging to predict from first principles. Characterizing the heavy... 1193
Reposted by Gijs D MuldersDr. Jessie Christiansen @aussiastronomer.bsky.social · 17/09/2025Sometimes 2025 just feels like a lot, and you need an excuse to celebrate your fabulous team (and the whole exoplanet community!) reaching a new milestone… Happy 6,000 Confirmed Exoplanets Day, everybody!!!! (You may recognize the narrator of the video at the link! 🫣) www.nasa.gov/universe/exo... 1124458
Reposted by Gijs D MuldersAdam Rains @spectraltypos.bsky.social · 17/09/2025Paper day! You're doing ground-based high-resolution exoplanet transmission spectroscopy and want to analyse the planet—not the star or Earth's atmosphere. Is there a way to disentangle your spectrum *without* destroying the planet signal? arxiv.org/abs/2509.12737 🧵⬇️ 🔭 #exoplanets #astromethodsarxiv.orgTSD: An inverse problem approach for recovering the exoplanetary atmosphere transmission spectrum from high-resolution spectroscopyOur ability to observe, detect, and characterize exoplanetary atmospheres has grown by leaps and bounds over the last 20 years, aided largely by developments in astronomical instrumentation; improveme... 1224
Reposted by Gijs D MuldersEmily Hunt @emily.space · 08/09/2025For the last two years, I've been paying for the Astronomy feeds hosting myself. It has been a privilege to grow our community here, but I also shouldn't keep doing it for free 😅 That's why I'm delighted to announce that we now have a donations page on Open Collective! 🔭☄️ #astrophotographyopencollective.comThe Astrosky Ecosystem - Open CollectiveWe're building an open-source ecosystem of social media tools for the space science & astronomy communities. 511253
Reposted by Gijs D MuldersMelina Thévenot🏳️⚧️ @melina-iras07572.bsky.social · 03/09/2025Seems like Ayumu Shoshi et al. did take a high-resolution ALMA image of the disk around IRAS 04125+2902. arxiv.org/abs/2509.01896 This system also has the youngest transiting #exoplanet, discovered in November 2024 with TESS. Disk, planet orbit and outer stellar companion orbit are all misaligned. 0143
Reposted by Gijs D MuldersMatthew Kenworthy @mattkenworthy.bsky.social · 26/08/2025Proud supervisor moment: #LeidenObservatory graduate student Richelle van Capelleveen led one of two papers on our discovery of WISPIT 2b, a 5 Jupiter mass exoplanet clearing a path in a circumstellar disk. Laird Close and his team saw it in H-alpha, indicating gas accretion #astrodon 🔭 🧪 1219452
Reposted by Gijs D MuldersGabe Weible @gabeweible.bsky.social · 26/08/2025New protoplanet(s?) alert! I'm happy to share this LBTI image of WISPIT 2 from our team's paper led by Laird Close. Planet b was discovered at Hα with MagAO-X following the SPHERE disk discovery (R. van Capelleveen +), and CC1 might be a candidate 2nd (enshrouded?) protoplanet #exoplanets ☄️🔭🧪 24511
Gijs D Mulders @gijsmulders.com · 20/08/2025#achievement for the day (please don't send me any more email) 020
Reposted by Gijs D MuldersJonathan Fortney @jjfplanet.bsky.social · 19/08/2025I think that mass-loss is important for sub-Neptunes and the "radius valley," but I do not think that "core-powered" escape is significant. We find that "Boil-off," right when the disk dissipates, and then XUV driven escape, are major influences. ui.adsabs.harvard.edu/abs/2024ApJ....ui.adsabs.harvard.edu 184
Gijs D Mulders @gijsmulders.com · 19/08/2025Question for the radial velocity #exoplanets experts: Is there an animation that shows two spectra being shifted with respect to each other and the corresponding values of the cross correlation function changing? I think I’ve seen one in a talk but can’t find a nice animation online 1104
Reposted by Gijs D MuldersDr Ryan MacDonald @distantworlds.space · 13/08/2025We looked for an atmosphere on TRAPPIST-1d using JWST, but we didn't see any atmospheric absorption. So TRAPPIST-1d is quite different from Earth, despite lying just inside the habitable zone. The planet is either: ➡️ A bare rock. ➡️ Very cloudy. ➡️ Has a thin, Mars-like atmosphere. #Exoplanets 🔭 2499
Reposted by Gijs D MuldersKevin Hardegree-Ullman @kevinkhu.bsky.social · 11/08/2025Kepler mission: smaller stars have more short-period, small #exoplanets. Theory: the smallest stars won’t have enough disk material to make small planets so there must be a turnover. Kepler+K2: We have found a turnover! Check out our newest Scaling K2 paper: arxiv.org/abs/2508.05734 🧵 1/9 🔭🧪☄️arxiv.orgScaling K2 VIII: Short-Period Sub-Neptune Occurrence Rates Peak Around Early-Type M DwarfsWe uniformly combined data from the NASA Kepler and K2 missions to compute planet occurrence rates across the entire FGK and M dwarf stellar range. The K2 mission, driven by targets selected by guest ... 25418
Reposted by Gijs D MuldersSteve Desch @deschscoveries.bsky.social · 08/08/2025I have a complaint about Avi Loeb's latest work and I want to speak to management. medium.com/@steve.desch...medium.comThis is not the quality of pseudoscience infotainment to which I have grown accustomedTeasing the public with fraudulent or self-deluded promises of aliens used to mean something. It took work. It meant slapping together… 29401107
Reposted by Gijs D MuldersDr. Jessie Christiansen @aussiastronomer.bsky.social · 06/08/2025Images from Palomar at 2 different infrared wavelengths last night - one that Saturn's methane atmosphere absorbs, and one the it reflects! (The faint point source is the moon, Tethys!) Taken by David Ciardi, Catherine Clark, @lowbacca.bsky.social and Miranda Felsmann; animated by me (and ezgif!) 632377
Reposted by Gijs D MuldersDr. Jessie Christiansen @aussiastronomer.bsky.social · 07/08/2025I really like this graphical summary of the architectures of planetary systems from @sidereuskinch.bsky.social's talk at From Transits to Trends! 0156
Reposted by Gijs D MuldersDavid Kipping @davidkipping.bsky.social · 26/07/2025New paper! Allow me to introduce TARS = Torqued Accelerator using Radiation from the Sun. TARS (yes inspired by Interstellar!) is a rotating light sail that's capable of launching chip sats into interstellar space using only radiation from the Sun, so let's dive into how it works. 48215
Reposted by Gijs D MuldersDr. Jessie Christiansen @aussiastronomer.bsky.social · 26/07/2025The main takeaway of my talk, in the style of the ‘Behold my field of fucks and see that it is barren’ embroidery: 3201
Reposted by Gijs D MuldersHarshitha M Parashivamurthy @harshithamysore.bsky.social · 23/07/2025What does the radius valley tell about the planet formation scenario around low mass stars? And how does it connect it with water worlds? To know more, come visit my poster #37 at SSW2025. #sagan2025 #exoplanets 041
![Comic. [Person 1 sitting at desk typing on laptop while Person 2 with shoulder-length hair stands behind.] PERSON 1: Aw man, speedrun.com removed my world record just because I listened to lateralus and ænima to get in the flow. PERSON 2: Oh, a copyright thing? PERSON 1: No, they don’t allow tool-assisted speedruns.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreiar3wsjy5rdmexkvbkh322xd77jkkihi55attsje5jknacobnmjti)
![4-panel comic. (1) [Glowing black dot surrounded by clouds.] DOT: I think I did a good job with this universe. Pressure waves dance through gas clouds. They clump together and then pressure pushes them apart. (2) [Some of the clouds are clumping together.] DOT: Oh weird, that big clump of clouds is staying together. Their gravity is overcoming the pressure and more gas is falling in. (3) [More clouds are sucked in.] DOT: It’s not stopping! The heat is rising but the collapse is only accelerating! I messed up. I messed up *bad*. (4) [The clump has become a shining star.] DOT: NOOOOOOOO!!! My beautiful clouds! Ruined! It’s all ruined!](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreiae4qcq3k4rea6dmb4vcttgnajgfurbpa34isuyr6sclzdq3gijci)
