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Posts by Remco de Kok

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Cloudy with a chance of metals: Indications of CO$_2$ in the atmosphere of GJ 1214 b from high-resolution K-band spectroscopy Sub-Neptune exoplanets frequently exhibit muted transmission spectra, with GJ 1214 b being the most prominent example. Following years of intense observing campaigns yielding featureless planetary spe...

Intriguing hint of CO2 in my favorite exoplanet GJ 1214b. It seems the detection can be reconciled with other measurements with a bit of effort, but at least it's a signal to not give up hope of on this little planet.
Nortmann+ arxiv.org/abs/2604.15292
🧪🔭 #exoplanets

4 days ago 6 1 0 0

Just living in Oxford felt like that quite often, tbh.

6 days ago 5 0 3 0

That Iran "coal comeback" in full

6 days ago 58 27 0 1

It would be cool to get some observational constraints (not just flatness of the spectrum) that can confirm the aerosol properties of these planets.

6 days ago 0 0 0 0
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Sub-Neptunes as Soot Factories: Deep Atmosphere Hydrocarbon Formation and Quenching as the Origin of Sub-Neptune Aerosol Trends Recent population-level studies of sub-Neptune atmospheres have identified a parabolic trend in transmission spectrum amplitude for planets with Teq ~ 500-800 K. While the trend has been commonly attr...

Interesting modelling study...the haziness of relatively small exoplanets might have something to do with hydrocarbon aerosol formation. Not from photochemistry, but from formation in the deep atmosphere.
Yang+ arxiv.org/abs/2604.11919
🧪🔭 #exoplanets

6 days ago 3 1 1 0
Stop War

Stop War

Calligraphy by Barbara Galińska #StopWar

1 week ago 391 93 0 4

Among others.

1 week ago 1 0 0 0

I saw multiple different ones within the few seconds that I checked. Ffs

1 week ago 1 0 0 0
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Why would you create fake Artemis images that are close to the real ones? Just why?

1 week ago 37 2 3 1
A robotic arm extends to place science instruments in contact with textured rocks.

A robotic arm extends to place science instruments in contact with textured rocks.

Meanwhile on Mars...

Check the wild textures in the background

science.nasa.gov/mission/msl-...

1 week ago 44 13 2 0

The Karakoram anomaly seems pretty much gone now.

1 week ago 1 0 0 0

Eerste gsm rond 2008, eerste smartphone rond 2012. Heel lang weten te weerstaan haha

1 week ago 1 0 0 0

I try to stick to yay-science on here, but seriously, remove this man from office for the sake of all of humanity.

2 weeks ago 45 7 0 1
Venn diagrams of detection significance of CO, H2S, non-gray clouds, and non-isothermal temperatures using combinations of NIRISS, NIRSpec, and MIRI (and WFC3 as a replacement of NIRISS).

Venn diagrams of detection significance of CO, H2S, non-gray clouds, and non-isothermal temperatures using combinations of NIRISS, NIRSpec, and MIRI (and WFC3 as a replacement of NIRISS).

Ooo I quite like these plots, showing how well you detect things in an exoplanet (HAT-P-12b) spectrum with JWST (and HST) using combinations of instruments.
Heinke+ arxiv.org/abs/2604.01219
🧪🔭 #exoplanets

2 weeks ago 22 5 0 0

Astronomers just do random sciency stuff when they procrastinate :)

2 weeks ago 0 0 0 0
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Some Earth-looking satellites use the moon as a calibration target.

2 weeks ago 2 0 0 0

So. Many. Cow. Puns! 😅

2 weeks ago 1 0 0 0
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I am so excited for the #Dragonfly mission! A rotorcraft that will fly around on Saturn's largest moon #Titan!

NASA dropped a bunch of new multimedia for it and you should absolutely check it out 🤩

🔗 science.nasa.gov/mission/drag...

🔭🐡🧪🎨

3 weeks ago 81 31 2 0

Congrats! Twins rock! (slightly biased, being a twin myself ;) )

3 weeks ago 0 0 0 0

Data centers, reflecting mirrors, ... people just love messing up everything around them, don't they?

3 weeks ago 1 0 0 0

Stop scrolling & post two characters who bring you happiness.

3 weeks ago 3 0 0 0
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The Olympics Has a New Sex Testing Policy. The Evidence Doesn’t Add Up I’ve spent over 10 years obsessed with so-called “gender verification” tests. Proponents claim they have history and science on their side. They don’t.

The problem that every attempt at athletic sex testing runs into is that it's trying to force a strict binary onto something that is inherently a multidimensional continuum with overlapping distributions.

www.coyotemedia.org/the-olympics...

3 weeks ago 878 233 38 14

The advantage of starting with running relatively late in life is that you can still get a PB at age 44! 5k in 18:33 and still margin for improvement. Pretty happy.

3 weeks ago 1 0 0 0
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Titan, Saturn’s largest moon, was discovered on March 25, 1655, by Christiaan Huygens. More than 350 years later, it remains a key target for exploration. Launching in 2028, NASA’s Dragonfly mission will investigate the complex chemistry of this ocean world. https://dragonfly.jhuapl.edu/Why-Titan

3 weeks ago 107 49 2 10
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Udderly untranslateable?
I'll see myself out.

3 weeks ago 6 0 0 0

Talking about cows and calfs (small talk)

Taking old cows out of the ditch (bringing up things from the far past)

It's a truth as a cow (obvious fact)

Having the cows on dry land (being financially secure)

3 weeks ago 1 0 0 0

Some Dutch sayings:
When the calf is drowned, one fills up the well. (People do something only when something bad has already happened).

3 weeks ago 1 0 1 0

I also tough at the time that if we are a beer in a universe where most things are champagne, we're missing out on a great party.

3 weeks ago 1 0 0 0

This popped into my head after a talk by Dimitar Sasselov, who had this whole (probably intentionally provocative) talk about how we should all stop observing exoplanet and should first learn to model the Earth, which he compared to beer, in great detail.

3 weeks ago 2 0 1 0

I've used a combination once: You can model until the spherical cows come home...(but you need data at some point).

3 weeks ago 6 0 1 0