Marie-Luise Steinmeyer
@mlformsplanets.bsky.social
Postdoc at the Institute for particles physics and astrophysics, ETH Zürich, Switzerland | studying the evolution of sub-Neptunes | formerly at Globe Institute, University of Copenhagen, Denmark | 🌈
Reposted by Marie-Luise Steinmeyer
Very exciting paper on arXiv today: arxiv.org/abs/2509.17231. The best evidence yet for a secondary atmosphere on an ultra-hot super-Earth. 🔭🌋 Very surprising given the theoretical predictions of rapid atmospheric escape ("cosmic shoreline") on these planets; [...]
A Thick Volatile Atmosphere on the Ultra-Hot Super-Earth TOI-561 b
Ultra-short period (USP) exoplanets -- with $R_p \leq 2~$R$_{\oplus}$ and periods $\leq$1 day -- are expected to be stripped of volatile atmospheres by intense host star irradiation, which is corrobor...
arxiv.org
September 23, 2025 at 8:15 AM
Very exciting paper on arXiv today: arxiv.org/abs/2509.17231. The best evidence yet for a secondary atmosphere on an ultra-hot super-Earth. 🔭🌋 Very surprising given the theoretical predictions of rapid atmospheric escape ("cosmic shoreline") on these planets; [...]
Reposted by Marie-Luise Steinmeyer
Sometimes 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...
Happy 6,000 Confirmed Exoplanets Day, everybody!!!!
(You may recognize the narrator of the video at the link! 🫣)
www.nasa.gov/universe/exo...
September 17, 2025 at 6:22 PM
Sometimes 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...
Happy 6,000 Confirmed Exoplanets Day, everybody!!!!
(You may recognize the narrator of the video at the link! 🫣)
www.nasa.gov/universe/exo...
Reposted by Marie-Luise Steinmeyer
Reposted by Marie-Luise Steinmeyer
Do you love WASP-107 b? Do you love making use of *both* ground VLT + space JWST obs to detect molecules in a "warm" (Teq<800K) #exoplanet in transmission, even in a crazy confusing cloudy atmosphere?!
🚨 It's PAPER* DAY! Which means #scicomm thread!
🧵⬇️🔭🪐🧪
*pre-print!
arxiv.org/abs/2508.18964
🚨 It's PAPER* DAY! Which means #scicomm thread!
🧵⬇️🔭🪐🧪
*pre-print!
arxiv.org/abs/2508.18964
VLT/CRIRES+ observations of warm Neptune WASP-107 b: Molecular detections and challenges in ground-based transmission spectroscopy of cooler and cloudy exoplanets
Atmospheres of transiting exoplanets can be studied spectroscopically using space-based or ground-based observations. Each has its own strengths and weaknesses, so there are benefits to both approache...
arxiv.org
August 27, 2025 at 10:38 AM
Do you love WASP-107 b? Do you love making use of *both* ground VLT + space JWST obs to detect molecules in a "warm" (Teq<800K) #exoplanet in transmission, even in a crazy confusing cloudy atmosphere?!
🚨 It's PAPER* DAY! Which means #scicomm thread!
🧵⬇️🔭🪐🧪
*pre-print!
arxiv.org/abs/2508.18964
🚨 It's PAPER* DAY! Which means #scicomm thread!
🧵⬇️🔭🪐🧪
*pre-print!
arxiv.org/abs/2508.18964
Reposted by Marie-Luise Steinmeyer
A very hungry planet! 🪐
What appears to be a ripple in space is actually a newborn planet, eating its way through its dusty cradle around a younger version of our Sun 🌞
Read more: https://www.eso.org/public/images/potw2534a/
🔭 🧪 #exoplanets
📷 ESO/R. van Capelleveen et al.
What appears to be a ripple in space is actually a newborn planet, eating its way through its dusty cradle around a younger version of our Sun 🌞
Read more: https://www.eso.org/public/images/potw2534a/
🔭 🧪 #exoplanets
📷 ESO/R. van Capelleveen et al.
August 26, 2025 at 10:02 AM
A very hungry planet! 🪐
What appears to be a ripple in space is actually a newborn planet, eating its way through its dusty cradle around a younger version of our Sun 🌞
Read more: https://www.eso.org/public/images/potw2534a/
🔭 🧪 #exoplanets
📷 ESO/R. van Capelleveen et al.
What appears to be a ripple in space is actually a newborn planet, eating its way through its dusty cradle around a younger version of our Sun 🌞
Read more: https://www.eso.org/public/images/potw2534a/
🔭 🧪 #exoplanets
📷 ESO/R. van Capelleveen et al.
Reposted by Marie-Luise Steinmeyer
Kepler 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
🔭🧪☄️
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
🔭🧪☄️
Scaling K2 VIII: Short-Period Sub-Neptune Occurrence Rates Peak Around Early-Type M Dwarfs
We 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 ...
arxiv.org
August 11, 2025 at 1:01 AM
Kepler 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
🔭🧪☄️
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
🔭🧪☄️
Reposted by Marie-Luise Steinmeyer
High-altitude clouds on Neptune.
Photographed by the Voyager 2 spacecraft on 25 August 1989.
Photographed by the Voyager 2 spacecraft on 25 August 1989.
August 11, 2025 at 1:05 AM
High-altitude clouds on Neptune.
Photographed by the Voyager 2 spacecraft on 25 August 1989.
Photographed by the Voyager 2 spacecraft on 25 August 1989.
I had a great time at #exoclimes last week, learning a lot, meeting new people, and catching up with old friends. Now, I'm off to the coast for hopefully a successful whale watching experience 🐳
July 15, 2025 at 8:35 PM
I had a great time at #exoclimes last week, learning a lot, meeting new people, and catching up with old friends. Now, I'm off to the coast for hopefully a successful whale watching experience 🐳
Reposted by Marie-Luise Steinmeyer
New paper out! This is a review of the published JWST observations of rocky exoplanets so far: arxiv.org/abs/2507.00933
Quick summary of the key points:
Quick summary of the key points:
arxiv.org
July 2, 2025 at 8:34 AM
New paper out! This is a review of the published JWST observations of rocky exoplanets so far: arxiv.org/abs/2507.00933
Quick summary of the key points:
Quick summary of the key points:
Reposted by Marie-Luise Steinmeyer
June 17, 2025 at 1:35 PM
Reposted by Marie-Luise Steinmeyer
![Comic. [yellow sphere with icon that reads, CHECK ENGINE] [caption] This new sunspot cluster has raised concern among astronomers.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreifixtbs6xmvshoacqnxeqg2q5zpa5z4r36dcj2tz4wssavmfogmhe@jpeg)
June 2, 2025 at 7:58 PM
I will be volunteering at the PlanetS exhibition at Fantasy Basel, the swiss comic con. I'm very excited to see such an event from the other side ☺️
May 30, 2025 at 5:31 AM
I will be volunteering at the PlanetS exhibition at Fantasy Basel, the swiss comic con. I'm very excited to see such an event from the other side ☺️
Reposted by Marie-Luise Steinmeyer
I recently visited the ALMA observatory in Chile. While I was poking around the telescopes, ALMA researchers released amazing new views of planet-forming disks around young stars.
These are the most detailed images yet of new solar systems being born. 🧪🔭
public.nrao.edu/news/exoalma/
These are the most detailed images yet of new solar systems being born. 🧪🔭
public.nrao.edu/news/exoalma/
May 22, 2025 at 3:46 AM
I recently visited the ALMA observatory in Chile. While I was poking around the telescopes, ALMA researchers released amazing new views of planet-forming disks around young stars.
These are the most detailed images yet of new solar systems being born. 🧪🔭
public.nrao.edu/news/exoalma/
These are the most detailed images yet of new solar systems being born. 🧪🔭
public.nrao.edu/news/exoalma/
Reposted by Marie-Luise Steinmeyer
Just shared a new paper on the arXiv, led my @luiswel.bsky.social and me, on the challenges associated with detecting gases in exoplanet atmospheres. As the field pushes towards new and exciting opportunities, we thought it was time to talk about what it really means to “detect” something!
May 2, 2025 at 1:29 AM
Just shared a new paper on the arXiv, led my @luiswel.bsky.social and me, on the challenges associated with detecting gases in exoplanet atmospheres. As the field pushes towards new and exciting opportunities, we thought it was time to talk about what it really means to “detect” something!
Reposted by Marie-Luise Steinmeyer
So I know folks have heard the news about an exoplanet that might be “teeming with life”? 🌱
I created a series of infographics that aims to cover the key points of the research findings + some of the area where scientists are sceptical! 🧐
Meet K2-18b! 👋
#astronomy #exoplanet #scicomm
I created a series of infographics that aims to cover the key points of the research findings + some of the area where scientists are sceptical! 🧐
Meet K2-18b! 👋
#astronomy #exoplanet #scicomm
April 23, 2025 at 1:44 AM
So I know folks have heard the news about an exoplanet that might be “teeming with life”? 🌱
I created a series of infographics that aims to cover the key points of the research findings + some of the area where scientists are sceptical! 🧐
Meet K2-18b! 👋
#astronomy #exoplanet #scicomm
I created a series of infographics that aims to cover the key points of the research findings + some of the area where scientists are sceptical! 🧐
Meet K2-18b! 👋
#astronomy #exoplanet #scicomm
Reposted by Marie-Luise Steinmeyer
Since we’re all talking about it I want to blow up a real female space pioneer, Mae Jemison, an actual astronaut. She’s a graduate of Stanford and Cornel Medical School, served in the peace corps, started an educational nonprofit, and worked for the CDC researching vaccines. That’s a woman in space
April 14, 2025 at 4:03 PM
Since we’re all talking about it I want to blow up a real female space pioneer, Mae Jemison, an actual astronaut. She’s a graduate of Stanford and Cornel Medical School, served in the peace corps, started an educational nonprofit, and worked for the CDC researching vaccines. That’s a woman in space
Reposted by Marie-Luise Steinmeyer
I've also given out some globular clusters!
✨ Your star cluster is: Messier 2 ✨
It's so big and easy to see that it was discovered already in 1746. It's really old (12.5 billion years) and has tidal tails emanating from it that may be perturbed by the LMC iopscience.iop.org/article/10.3....
✨ Your star cluster is: Messier 2 ✨
It's so big and easy to see that it was discovered already in 1746. It's really old (12.5 billion years) and has tidal tails emanating from it that may be perturbed by the LMC iopscience.iop.org/article/10.3....
Messier 2 - Wikipedia
en.wikipedia.org
April 14, 2025 at 12:46 PM
I've also given out some globular clusters!
✨ Your star cluster is: Messier 2 ✨
It's so big and easy to see that it was discovered already in 1746. It's really old (12.5 billion years) and has tidal tails emanating from it that may be perturbed by the LMC iopscience.iop.org/article/10.3....
✨ Your star cluster is: Messier 2 ✨
It's so big and easy to see that it was discovered already in 1746. It's really old (12.5 billion years) and has tidal tails emanating from it that may be perturbed by the LMC iopscience.iop.org/article/10.3....
Reposted by Marie-Luise Steinmeyer
April 1, 2025 at 7:33 AM
Reposted by Marie-Luise Steinmeyer
Advertisement!:
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
Dust to DNA 2024
www.dust2dna.dk
March 31, 2025 at 11:16 AM
Advertisement!:
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
PhD-summer school at the Globe Institute, UCPH 18-22 August.
From interstellar dust to habitable planets and the conditions for life.
Interdisciplinary lectures with perspectives from astronomy, cosmochemistry, geology, and astrobiology.
For more see: www.dust2dna.dk
Reposted by Marie-Luise Steinmeyer
The new EULICD data release is AMAZING! 🔭
Here's a before / after of a random galaxy I found in one of the new images, comparing against the Digitized Sky Survey.
I highly recommend taking a look around on ESA Sky - it's fun! Link: sky.esa.int/esasky/?targ...
Here's a before / after of a random galaxy I found in one of the new images, comparing against the Digitized Sky Survey.
I highly recommend taking a look around on ESA Sky - it's fun! Link: sky.esa.int/esasky/?targ...
March 19, 2025 at 11:14 AM
The new EULICD data release is AMAZING! 🔭
Here's a before / after of a random galaxy I found in one of the new images, comparing against the Digitized Sky Survey.
I highly recommend taking a look around on ESA Sky - it's fun! Link: sky.esa.int/esasky/?targ...
Here's a before / after of a random galaxy I found in one of the new images, comparing against the Digitized Sky Survey.
I highly recommend taking a look around on ESA Sky - it's fun! Link: sky.esa.int/esasky/?targ...
Reposted by Marie-Luise Steinmeyer
💫 We are all stardust. It takes millions of years for dust grains to form planets.
A six-minute ride into space revealed some secrets of planetary birth, showing how collisions trigger growth spurts in these baby planets.
🪨⏩🪐 From pebbles to planets: www.esa.int/ESA_Multimed...
A six-minute ride into space revealed some secrets of planetary birth, showing how collisions trigger growth spurts in these baby planets.
🪨⏩🪐 From pebbles to planets: www.esa.int/ESA_Multimed...
From pebbles to planets
From pebbles to planets
www.esa.int
March 18, 2025 at 10:18 AM
💫 We are all stardust. It takes millions of years for dust grains to form planets.
A six-minute ride into space revealed some secrets of planetary birth, showing how collisions trigger growth spurts in these baby planets.
🪨⏩🪐 From pebbles to planets: www.esa.int/ESA_Multimed...
A six-minute ride into space revealed some secrets of planetary birth, showing how collisions trigger growth spurts in these baby planets.
🪨⏩🪐 From pebbles to planets: www.esa.int/ESA_Multimed...
Currently preparing a short presentation why I study the radius evolution of sub-Neptunes with different composition. This couldn't have come at better time.
March 18, 2025 at 1:56 PM
Currently preparing a short presentation why I study the radius evolution of sub-Neptunes with different composition. This couldn't have come at better time.
Reposted by Marie-Luise Steinmeyer
🔭 The JWST Cycle 4 science program is out today! 🔭
Some truly exhilarating #exoplanet programs will be carried out by JWST starting in July 2025.
Let's take a look at some highlights. 🛰️🔭🪐
THREAD (1/9)
Some truly exhilarating #exoplanet programs will be carried out by JWST starting in July 2025.
Let's take a look at some highlights. 🛰️🔭🪐
THREAD (1/9)
March 11, 2025 at 10:08 PM
🔭 The JWST Cycle 4 science program is out today! 🔭
Some truly exhilarating #exoplanet programs will be carried out by JWST starting in July 2025.
Let's take a look at some highlights. 🛰️🔭🪐
THREAD (1/9)
Some truly exhilarating #exoplanet programs will be carried out by JWST starting in July 2025.
Let's take a look at some highlights. 🛰️🔭🪐
THREAD (1/9)
Reposted by Marie-Luise Steinmeyer
Somewhat ridiculously, Saturn now has 128 new moons, bring its total to 274.
These are mostly tiny rocks, a few miles across, that orbit the planet backwards – but they might be evidence of a recent smashup in the planet's orbit.
Story by me in The New York Times
www.nytimes.com/2025/03/11/s...
These are mostly tiny rocks, a few miles across, that orbit the planet backwards – but they might be evidence of a recent smashup in the planet's orbit.
Story by me in The New York Times
www.nytimes.com/2025/03/11/s...
Saturn Gains 128 New Moons, Bringing Its Total to 274 (Gift Article)
The objects around the ringed planet are tiny, but some of them may have formed relatively recently in the solar system’s history.
www.nytimes.com
March 11, 2025 at 9:17 PM
Somewhat ridiculously, Saturn now has 128 new moons, bring its total to 274.
These are mostly tiny rocks, a few miles across, that orbit the planet backwards – but they might be evidence of a recent smashup in the planet's orbit.
Story by me in The New York Times
www.nytimes.com/2025/03/11/s...
These are mostly tiny rocks, a few miles across, that orbit the planet backwards – but they might be evidence of a recent smashup in the planet's orbit.
Story by me in The New York Times
www.nytimes.com/2025/03/11/s...
Reposted by Marie-Luise Steinmeyer
#MathArtMarch Day 11: Proof
A visual proof that the sum of the first n positive odd integers is n*n, attributed to Nicomachus of Gerasa (c. 100 CE) in Roger B. Nelson's book "Proof Without Words."
#MathArt
A visual proof that the sum of the first n positive odd integers is n*n, attributed to Nicomachus of Gerasa (c. 100 CE) in Roger B. Nelson's book "Proof Without Words."
#MathArt
March 11, 2025 at 5:11 AM
#MathArtMarch Day 11: Proof
A visual proof that the sum of the first n positive odd integers is n*n, attributed to Nicomachus of Gerasa (c. 100 CE) in Roger B. Nelson's book "Proof Without Words."
#MathArt
A visual proof that the sum of the first n positive odd integers is n*n, attributed to Nicomachus of Gerasa (c. 100 CE) in Roger B. Nelson's book "Proof Without Words."
#MathArt