#WASP-121
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soraespace.bsky.social
流出した大気が形成する“二重の尾”　太陽系外惑星WASP-121 bをウェッブ宇宙望遠鏡が観測
sorae.info/astronomy/20...

こちらは、最新の研究成果にもとづいた「WASP-121 b」の想像図。巨大ガス惑星の前後に帯状の雲のような尾が形成され、恒星を取り囲むように広がっている様子が描かれています
流出した大気が形成する“二重の尾”　太陽系外惑星WASP-121 bをウェッブ宇宙望遠鏡が観測
こちらは、最新の研究成果にもとづいた、太陽系外惑星「WASP-121 b」の想像図です。巨大ガス惑星の前後に帯状の雲のような尾が形成され、恒星を取り囲むように広がっている様子が描かれています
sorae.info
December 15, 2025 at 12:06 PM
mpi-astro.bsky.social
MPIA-Forschende entdecken mit dem James Webb Space Telescope deutliche Unterschiede in der Atmosphäre des ultraheißen Exoplaneten WASP-121 zwischen der morgendlichen und abendlichen Übergangszone 🔭

www.mpia.de/aktuelles/wi...
Von der Dämmerung bis zum Morgengrauen
Astronomen entdecken Unterschiede in Temperatur und Chemie zwischen Morgen- und Abendzone auf dem ultraheißen Exoplaneten WASP-121 b.
www.mpia.de
June 14, 2026 at 10:44 AM
bricehaziza.bsky.social
🔴💎🔭Le James-Webb pousse un peu plus loin notre connaissance de la météo des exoplanètes. Wasp-121 b possède des vents à 18 000 km/h et probablement des pluies continues de saphirs et de rubis. Voyons comment cela est possible :
www.lesnumeriques.com/astronomie-c...
James-Webb révèle une météo invraisemblable : pluie de rubis et saphirs et vents à 18 000 km/h
Une météo extraterrestre digne de la science-fiction. Le télescope James-Webb a scruté l'atmosphère de l'exoplanète WASP-121 b, révélant un enfer thermique balayé par des vents à 18 000 km/h où le ref...
www.lesnumeriques.com
June 17, 2026 at 6:08 AM
pauleric70.bsky.social
phys.org/news/2026-06...
JWST reveals dawn-dusk atmosphere split on ultra-hot exoplanet WASP-121 b
Astronomers have revealed distinct differences in atmospheric conditions between the morning and evening transition zones of the ultra-hot gas planet WASP-121 b, which separate day from night, commonl...
phys.org
June 12, 2026 at 1:50 AM
mpi-astro.bsky.social
MPIA researchers discovered clear differences between the morning and evening sides of the ultrahot gas planet WASP-121 b with JWST 🔭

www.mpia.de/news/science...
From Dusk Till Dawn
Astronomers reveal atmospheric differences between morning and evening sides of ultrahot exoplanet WASP121 b using JWST observations.
www.mpia.de
June 14, 2026 at 11:25 AM
cinnatus.bsky.social
An excellent haiku by @wolftwinthomas.bsky.social in Modern Haiku 57.2 (page 121).

empty chapel—
a wasp tapping
at the stained glass
page 121 of modern haiku 57.2 empty chapel— a wasp tapping at the stained glass
June 18, 2026 at 2:39 PM
nature.com
The ultrahot exoplanet WASP‑121 b has strong winds that transport material in different directions depending on the altitude in the planet’s atmosphere

https://go.nature.com/4hJQFqZ
Winds on an ultrahot planet challenge climate models
The vertical placement of an exoplanet’s jet stream is not predicted by simulated climate systems.
go.nature.com
March 24, 2025 at 3:29 PM
astroduncan.bsky.social
MPIA PhD student Angelique Kahle has a very cool paper out today looking at everyone's favourite ultra-hot Jupiter, WASP-121b. Angelique is giving a talk on the results next Monday at Exoplanets VI, as well. #exoplanets

arxiv.org/abs/2606.21855
The panchromatic JWST dayside spectrum of WASP-121 b reveals a refractory-rich formation
One path to understand how planets form is to link their present-day atmospheric composition to predictions from planet formation models. For the hottest planets, the abundances of refractory species ...
arxiv.org
June 23, 2026 at 6:20 AM
idontknowgoddamnit.bsky.social
Second half of week three down
Dilmun / WASP-121
WASP-12
Cervantes / Mu Arae
December 22, 2024 at 8:46 PM
marijkelouise.bsky.social
De weerpatronen op de verre planeet Tylos, ook bekend als WASP-121 b, op zo'n 880 lichtjaar afstand van de aarde.

Enorme cyclonen en ander dynamisch weer dat ronddraait op een hete planeet ter grootte van Jupiter.

youtu.be/PF6sRMpdrfA
WASP-121 b weather patterns (slowed)
This video shows the weather patterns on the exoplanet WASP-121 b, also known as Tylos. This video has been slowed down to show the patterns in the exoplanet...
youtu.be
January 9, 2024 at 8:52 PM
soraespace.bsky.social
鉄さえも蒸発する惑星「WASP-121b（ティロス）」と主星「WASP-121（ディルムン）」【今日の宇宙画像】
sorae.info/newslink/sap...
鉄さえも蒸発する惑星「WASP-121b（ティロス）」と主星「WASP-121（ディルムン）」【今日の宇宙画像】 - sorae 宇宙へのポータルサイト
「太陽系外惑星命名キャンペーン2022」において、主星のWASP-121は「Dilmun (ディルムン)」、惑星のWASP-121bは「Tylos (Τύλος / ティロス)」と名付けられており、ジェイムズ・ウェッブ宇宙望遠鏡の観測対象とされています。
sorae.info
October 22, 2024 at 2:09 PM
astronemly.bsky.social
Woohoo! Robert Frazier, PhD student who did his pre-candidate project with me, had it accepted for publication today! An impressive comparison of a JWST spectroscopic phase curve to a set of 3-D models (of the ultra-hot Jupiter WASP-121b). Preprint here: arxiv.org/abs/2605.01589
The Days Drag On on WASP-121 b: Interpreting its NIRISS Spectroscopic Phase Curve with General Circulation Models
Ultra-hot Jupiters present extreme atmospheric phenomena not found in the Solar System. These planets' daysides experience strong temperature inversions, molecular species (including H2) dissociate, a...
arxiv.org
May 5, 2026 at 9:31 PM
exoplanetpete.bsky.social
This paper is now published in AJ! You can check it out here iopscience.iop.org/article/10.3...

A huge thanks to all of my collaborators who made this possible ❤️

If you're in a hurry, a thread below:

0/8
December 2, 2024 at 5:18 PM
astrobiology.bsky.social
An Absolute Mass, Precise Age, and Hints of Planetary Winds for WASP-121 A and b From a JWST NIRSpec Phase Curve
astrobiology.com/2025/01/an-a... #astrobiology #exoplanet
An Absolute Mass, Precise Age, and Hints of Planetary Winds for WASP-121 A and b From a JWST NIRSpec Phase Curve - Astrobiology
We have conducted a planetary radial velocity measurement of the ultra-hot Jupiter WASP-121b
astrobiology.com
January 8, 2025 at 6:08 PM
astrobiology.bsky.social
Quantifying Thermal Water Dissociation In The Dayside Photosphere Of WASP-121 b Using NIRPS
astrobiology.com/2025/08/quan... #astrobiology
Quantifying Thermal Water Dissociation In The Dayside Photosphere Of WASP-121 b Using NIRPS - Astrobiology
The intense stellar irradiation of ultra-hot Jupiters results in some of the most extreme atmospheric environments in the planetary regime.
astrobiology.com
August 14, 2025 at 7:56 PM
marijkelouise.bsky.social
de weerpatronen op de exoplaneet WASP-121 b, ook bekend als Tylos.

Hubble-waarnemingen van de exoplaneet uit de jaren 2016, 2018 en 2019 verzameld en opnieuw verwerkt.

Dit leverde een unieke dataset op waarmee ze de atmosfeer van WASP-121 b konden analyseren.

youtu.be/PF6sRMpdrfA
WASP-121 b weather patterns (slowed)
This video shows the weather patterns on the exoplanet WASP-121 b, also known as Tylos. This video has been slowed down to show the patterns in the exoplanet...
youtu.be
January 31, 2024 at 11:25 AM
Pable Drake Hernandez (Caltech)presents modeling of JWST infrared spectra of the hot Jupiter WASP-121 showing evidence of TiO depletion in its atmosphere #ExSoCal
December 16, 2025 at 7:43 PM
natastron.nature.com
JWST obs. suggest that both pebbles and planetesimals played key roles in forming the giant exoplanet WASP-121 b beyond the H2O ice line. Also, strong vertical mixing likely drives the nightside atmospheric chemistry. Evans-Soma et al.: https://bit.ly/43E4IcC #AstroSci
SiO and a super-stellar C/O ratio in the atmosphere of the giant exoplanet WASP-121 b - Nature Astronomy
JWST observations suggest that both pebbles and planetesimals played an important role in forming the giant exoplanet WASP-121 b beyond the H2O ice line. They also indicate that strong vertical mixing likely drives the nightside atmospheric chemistry.
bit.ly
June 2, 2025 at 2:51 PM
pomaranc.bsky.social
💫Tylos, známy aj ako WASP-121 b, je exoplanéta typu „ultra-horúci Jupiter“. Nachádza sa vo vzdialenosti približne 900 svetelných rokov a svoju hviezdu obehne za zhruba 30 pozemských hodín.
February 19, 2026 at 1:15 PM
nplusodin.bsky.social
«Джеймс Уэбб» помог обнаружить у ультрагорячего юпитера WASP-121b пары длинных газовых хвостов, за форму которых ответственна родительская звезда

https://nplus1.ru/news/2025/12/11/wasp-121-b-jwst-tails
«Джеймс Уэбб» нашел длинные гелиевые хвосты у ультрагорячего юпитера
N + 1 — главное издание о науке, технике и технологиях
nplus1.ru
December 11, 2025 at 5:31 PM
marijkelouise.bsky.social
Astronomen hebben Hubble-waarnemingen gebruikt om het weer op de zinderend hete planeet WASP-121 b in kaart te brengen.

Enorme cyclonen wervelen over de helse planeet vanwege het grote temperatuurverschil tussen de dag- en nachtzijde.

hubblesite.org/contents/new...
January 5, 2024 at 11:03 AM
hayatomaudit.bsky.social
鉄さえも蒸発する惑星「WASP-121b（ティロス）」と主星「WASP-121（ディルムン）」【今日の宇宙画像】
　
sorae.info/newslink/sap...
鉄さえも蒸発する惑星「WASP-121b（ティロス）」と主星「WASP-121（ディルムン）」【今日の宇宙画像】 - sorae 宇宙へのポータルサイト
「太陽系外惑星命名キャンペーン2022」において、主星のWASP-121は「Dilmun (ディルムン)」、惑星のWASP-121bは「Tylos (Τύλος / ティロス)」と名付けられており、ジェイムズ・ウェッブ宇宙望遠鏡の観測対象とされています。
sorae.info
October 23, 2024 at 9:37 AM
nplusodin.bsky.social
«Джеймс Уэбб» помог обнаружить у ультрагорячего юпитера WASP-121b пары длинных газовых хвостов, за форму которых ответственна родительская звезда

https://nplus1.ru/news/2025/12/11/wasp-121-b-jwst-tails

#главноезанеделю
«Джеймс Уэбб» нашел длинные гелиевые хвосты у ультрагорячего юпитера
N + 1 — главное издание о науке, технике и технологиях
nplus1.ru
December 14, 2025 at 2:14 PM
handle.invalid
In case you’re interested in the paper(s) about WASP-121 b using the 4UT mode of ESPRESSO — or as I like to call it: ESPRESSO’s superpower — check out:

ui.adsabs.harvard.edu/abs/2025A%26...

ui.adsabs.harvard.edu/abs/2025Natu...
July 10, 2025 at 5:20 PM
exoplanetpete.bsky.social
My latest paper is on the arXiv! We take a look at the dayside of ultra hot Jupiter WASP-121 b with IGRINS on Gemini South (rip) and show you can simultaneously measure both the C/O and refractory/volatile ratios with a single instrument arxiv.org/abs/2410.19017
The Roasting Marshmallows Program with IGRINS on Gemini South II -- WASP-121 b has super-stellar C/O and refractory-to-volatile ratios
A primary goal of exoplanet science is to measure the atmospheric composition of gas giants in order to infer their formation and migration histories. Common diagnostics for planet formation are the a...
arxiv.org
October 28, 2024 at 5:09 PM