Reposted by @viciykevin.bsky.socialAlex Santerne @alexsanterne.bsky.social · 23/06/2026⚠️ Today, we are posting on #arXiv not only 1, nor 2, but 3 papers on the fascinating system #HIP41378. This system hosts 6 and maybe 7 planets 🪐. These papers are the results of a long-lasting investigation on this system initially discovered by the K2's mission, reported in 2016. (🧵 1/6 👇) 15519
Reposted by @viciykevin.bsky.socialDr. Jessie Christiansen @aussiastronomer.bsky.social · 24/06/2026Whoa! Simultaneous papers announcing the discovery of a new directly imaged planet - beta Pictoris d!!! arxiv.org/pdf/2606.23801 arxiv.org/pdf/2606.23789 It's just so BIG. I can't believe it's just so ROUND, it's like OUT THERE. 🪐 (Courtesy of my kids who have just discovered Sir Mix-A-Lot) 926251
Reposted by @viciykevin.bsky.socialDr. Jessie Christiansen @aussiastronomer.bsky.social · 27/04/2026“I’ve been waiting for papers like this for a long time now.” 38720
Reposted by @viciykevin.bsky.socialKevin Hardegree-Ullman @kevinkhu.bsky.social · 08/04/2026The Gaia DR3 IDs for TESS Input Catalog Targets RNAAS article is now published! #exoplanets 🔭🧪 iopscience.iop.org/article/10.3...iopscience.iop.orgGaia DR3 IDs for TESS Input Catalog TargetsGaia DR3 IDs for TESS Input Catalog Targets, Hardegree-Ullman, Kevin K., Swain, Melanie A., Christiansen, Jessie L., Gilbert, Emily A., Harbut, Marcy, Kesseli, Aurora Y., Lund, Michael B., Lynn, Meca, van Eyken, Julian C. 0199
Reposted by @viciykevin.bsky.socialDr. Jessie Christiansen @aussiastronomer.bsky.social · 27/01/2026Hey, that's a neat transit! There's something weird with the x-axis though. Wait, how long was this transit? *rubs eyes, cartoon style* *looks again* EIGHT MONTHS?!?!?!? iopscience.iop.org/article/10.3... 6476
Reposted by @viciykevin.bsky.socialElise Cutts @elisecutts.bsky.social · 28/01/2026New planet just dropped and it 1) is almost exactly Earth-sized 2) has a year that's almost exactly 1 Earth year. 3) orbits a star that is not a 💢temperamental little shit M-dwarf 💢but is instead a 🧡 good orange boi 🧡 Me for @science.org based on results presented at #RockyWorlds4: 🔭🧪science.orgEarth-size planet spotted with yearlong orbitLong-overlooked Kepler signal discovered by citizen scientists reveals promising world worth a closer look 491512427
Reposted by @viciykevin.bsky.socialThayne Currie 🇺🇦 @astrothayne.bsky.social · 03/12/2025(announcement 1 of 2) everyone, say hello to ... HIP 54515 b: the 3rd planet jointly discovered from direct imaging and astrometry arxiv.org/abs/2512.02159 [Currie & Li et al. 2025, AJ in press] Press releases to follow tomorrow 1246
Reposted by @viciykevin.bsky.socialBrian Eno News @dark-shark.bsky.social · 15/10/2025Fela Kuti was born on October 15, 1938 #Afrobeat #Felabration 118728
Reposted by @viciykevin.bsky.socialESA Space Science @science.esa.int · 11/09/2025Welcome, Plato! 🤗 On 1 September, the spacecraft arrived in the Netherlands by boat from Germany via the Rhine River. In the coming weeks, engineers will add the sunshield & solar arrays and carry out tests to confirm Plato is ready for launch 🚀 www.esa.int/Science_Expl... 🔭 #Exoplanets 010525
Reposted by @viciykevin.bsky.socialAndrew McCabe @andrewahala.bsky.social · 09/09/2025New in library. The chiarascuro full page portraits are iconic (see what I did 🙄) high Renaissance art. Goltzius 1557, German ed. bound in illuminated manuscript. Some empty roundels charmingly filled out with primitive portraits, notes or diagrams. Several hundred medallions with bios. Folio. 0174
Reposted by @viciykevin.bsky.socialMatthew Kenworthy @mattkenworthy.bsky.social · 09/09/2025Two papers announcing the discovery of a directly imaged 6 Jupiter mass planet around binary system HD 143811 AB Squicciarini+ and Jones+ in Sco-Cen - Keck, Gemini and VLT all imaging this companion and confirmed with several years of common proper motion. #astrodon #exoplanet #exosci 0458
Reposted by @viciykevin.bsky.socialMelina Thévenot🏳️⚧️ @melina-iras07572.bsky.social · 18/08/2025Dwarf planet #Quaoar with its moon #Weywot (small white point right side). The system orbits the sun in the #KuiperBelt beyond planet Neptune. Quaoar has rings (not seen here). 🪐🌕 🔭 #planetsci #dwarfplanet My image with #JWST, processed today: commons.wikimedia.org/wiki/File:Qu... 2389
Reposted by @viciykevin.bsky.socialMatthew 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 @viciykevin.bsky.socialDavid Grinspoon @drfunkyspoon.bsky.social · 19/08/2025“A peaceful place, or so it looks from space…” New image of the home world and our companion moon, captured last month from 180 million miles out by our Psyche spacecraft on its way toward the first rendezvous with a metallic asteroid in 2029. 🧪 www.nasa.gov/missions/psy... 313641
Reposted by @viciykevin.bsky.socialESA Space Science @science.esa.int · 13/08/2025The TRAPPIST-1 d exoplanet may be Earth-sized 🌍 but it has no Earth-like atmosphere. Webb’s #NIRSpec has found no traces of molecules that are common in Earth’s atmosphere. Read more 👉 www.esa.int/Science_Expl... 🔭 🧪 116325
Reposted by @viciykevin.bsky.socialKevin Hardegree-Ullman @kevinkhu.bsky.social · 11/08/2025We computed planet occurrence rates separately for super-Earth and sub-Neptune #exoplanets for host stars between 3200 K and 6900 K. The sub-Neptunes peak around 3750 K and drop toward cooler stars! However, the super-Earths do not drop off! 5/9 2112
Reposted by @viciykevin.bsky.socialKevin 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 @viciykevin.bsky.socialWilliam Thompson @wrtastro.bsky.social · 03/03/2025Time for the promised thread on ε Eridani b! I should emphasize this manuscript is a submitted draft—comments from the community are very welcome. Bottom line: ε Eri b is likely a 1.0 Jupiter-mass planet, only 3.2pc away, on a 3.55 AU near-circular orbit, ~aligned with its debris disk. 🔭🪐🧪 [1/7] 98223
Reposted by @viciykevin.bsky.socialDr. Jessie Christiansen @aussiastronomer.bsky.social · 30/07/2025A timely paper for #HWO25: is it enough to find Earth-like planets around other nearby stars? No! We need their planetary system contexts. Does life on Earth depend on Jupiter? @sabinastro.bsky.social led this nice analysis of HWO requirements to detect Earths + Jupiters. arxiv.org/abs/2507.21443arxiv.orgRequirements for Joint Orbital Characterization of Cold Giants and Habitable Worlds with Habitable Worlds ObservatoryWe determine optimal requirements for the joint detection of habitable-zone planets and cold giant planets with the Habitable Worlds Observatory (HWO). Analysis of 164 nearby stars shows that a corona... 02110
Reposted by @viciykevin.bsky.socialPaul Byrne @theplanetaryguy.com · 10/06/2025This is a photo of an exoplanet from JWST. A photo. Of a planet orbiting a star 60 lightyears away. A real world, 568 trillion kilometres away. 923548
Reposted by @viciykevin.bsky.socialCorey S. Powell @coreyspowell.bsky.social · 17/04/2025The potential discovery of alien life is so enticing that it drags even reputable outlets into running naive or outright misleading stories. Here we go again with planet K2-18b. Um....there's strong evidence of non-biological sources of the molecule DMS. 🧪🔭 45673119
