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Mark McCaughrean

@markmccaughrean@mastodon.social
mastodon 4.6.0-nightly.2026-03-16

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 



Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

0 Followers
0 Following
Joined April 25, 2022
Personal website:
http://www.markmccaughrean.net
Space Rocks:
http://www.spacerocksofficial.com
111 Places in Space book:
https://emons-verlag.de/p/111-places-in-space-that-you-must-not-miss-7517

Posts

markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · 3d ago

Coming up soon: the 40th anniversary of the ESA Giotto probe’s flyby of Comet 1P/Halley, with closest approach at 00:03:02 UTC on 14 March 1986.

Giotto flew within 596 km of the comet at a relative velocity of ~250,000 km/h, so it was all over quickly, but remarkable views of the 14.5 km long dark icy monster were had.

Albeit not this composite made later by Nick Thomas on the Giotto team.

What happened as images streamed back to live TV is another story 😬✌️

Who remembers that night?

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 08, 2026

And now what you've really been waiting for, some cute jumping spider pictures 🥰

Several different species out in the garden today, but let's start with the woodland jumping spider, Evarcha falcata (Bunter Sichelspringer in 🇩🇪).

Not a new species, but always fun to observe & interact with 🙂

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#ArachnidsOfMastodon 🕷️
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 07, 2026

And a bonus bug from this afternoon’s ride – some western honey bees (Apis mellifera) out in the warm sunshine 🐝

It was one of many such bees taking advantage of the flowering willows along the edge of the Fiuschkinderstube pond between Edingen & Neckarhausen 👍

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#InsectsOfMastodon 🪳
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 04, 2026

Not a particularly good picture with the macro mode on my phone, not least as this spider's web was awkwardly placed.

But a new species is a new species, & it seems a pretty good bet that it's a Zilla or masked orbweaver (Zilla diodia), aka the Maskenspinne in 🇩🇪

As seen on the edge of the woods on the Königstuhl this afternoon.

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#ArachnidsOfMastodon 🕷️
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 03, 2026

Well, one thing is certain – these are both red velvet mites in the family Trombidiidae.

They were photographed close together, but I'm not sure if they're from the same species or genus even.

Given the shape & dimples seen in the second, fuzzy shot, I suspect genus Allothrombium, the sumo mites, but ...

There are sooo many species of these little arachnids ... 😱

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#ArachnidsOfMastodon 🕷️
#BackGardenEntomology 🪲

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Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 03, 2026

Hmm 🤨

Not happy with any of these pictures, despite the fact that there was plenty of light out there.

But this little jumping spider was moving quickly, patrolling its territory, so it was hard to capture.

It's definitely in the Heliophanus genus & best guess is H. cupreus, the copper sun jumper (Kupfrige Sonnenspringspinne in 🇩🇪), but H. flavipes is possible.

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#ArachnidsOfMastodon 🕷️
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 02, 2026

Terrible picture today, but these ants were running around like crazy in the undergrowth, so it was very hard to get a decent macro shot 😱

But from the black & grey striped abdomen, I think it's Formica fusca, the silky or dusky ant in English, or the more dramatic Grauschwarze Sklavenameise in German 🐜

Many of them about, so hopefully I'll get better shots 🤞

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#InsectsOfMastodon 🪳
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 01, 2026

A sunny afternoon, so decided to spend some time with the arthropods – I'll cycle later in the week.

First up, a red admiral butterfly (Vanessa atalanta; just Admiral in 🇩🇪) that survived the winter.

The shot of the undersides of the folded wings is not the best, but I like the hints of iridescence.

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#InsectsOfMastodon 🪳
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Mar 01, 2026

“A modest proposal for preventing the AI children of rich people becoming a burthen to ordinary parents or countries, and for stopping the propaganda about them being beneficial to the publick.”

Can someone please create a hunter-killer AI whose reward function makes it feel happy and sated after consuming other AI systems?

And that, ultimately, as the last remaining AI system, it achieves apotheosis by eating itself?

With apologies to Dr Swift, I thank you 🙇‍♂️

#StopTheWorldIWantToGetOff

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 28, 2026

This afternoon’s gig 👇

I’m at a symposium & reception honouring the retirement of my friend & colleague, Prof Joachim Wambsganß, director of the Astronomisches-Rechen Institut at the University of Heidelberg.

Many old colleagues, family, & friends will be here & I have the honour & pleasure 😱 of being the emcee for the afternoon.

Music & wine are sure to feature, both loves of Joachim beyond gravitational lensing & astronomy ✨🍷🎶

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 27, 2026

Re: the newly reshuffled Artemis programme, here's the official NASA graphic laying out the architecture for missions II, III, IV, and beyond.

I suggest you hang upside down before trying to decipher it, to avoid a nose bleed 🙃

And no signs of any ESA logos anywhere, which is interesting, because they're already on the real Orion & ESM.

#Space #SpaceExploration

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 27, 2026

Another sunny early spring afternoon on the Königstuhl, & today's wee beastie is a zebra jumping spider (Salticus scenicus; Zebraspringspinne in 🇩🇪).

i look forward to seeing some in my garden too, as they're always curious & engaged, so fun to photograph with a proper macro lens 🙂👍

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#ArachnidsOfMastodon 🕷️
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 24, 2026

I’m afraid that this wee beast didn’t make it through the winter.

It did manage to climb up the inside of a window overnight, but appears to have expired there.

The M-shaped marking on the head suggests that it’s a harlequin or Asian ladybird (Harmonia axyridis). Their patterns are highly variable, this one with just two small side spots.

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#InsectsOfMastodon 🪳
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 15, 2026

RE: @GIMP@floss.social

Lovely to see my #JWST image of The Dragon Jet featured as the latest #GIMP 3.2 release candidate (RC3) splash screen.

Question is, with my Orion Nebula long-wavelength & short-wavelength images used for RC1 & RC2, respectively, which one is going to end up used for the official 3.2 release?

There are rumours of a vote being held – which one would you prefer? 🙂

(Thanks again to Jehan & his development team for the honour 🙇‍♂️)

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Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 14, 2026

Yuk 😬

The radar said no rain today 🙂

The radar lied 😕

OK, it was mostly drizzle, but there was a lot of it, making for a wet & mucky 51km ride today. Windy & cold too, to top it off 🙄

#CyclingLife 🚴‍♂️
#Heidelberg 🏰
#Photography 📷

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 14, 2026

Opened the door this morning to let some fresh air in & this little beastie took the opportunity to come in for some warmth.

Instead, it got photographed & ushered back outside 🤷‍♂️

Very hard to ID though – likely in the Linypiidae family of sheet weavers or money spiders.

Best guess: common ground weaver (Tenuiphantes tenuis), but am very open to other suggestions.

#Heidelberg 🏰
#Photography 📷️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️️
#BugOfTheDay 🐞
#MacroPhotography 🔬
#ArachnidsOfMastodon 🕷️
#BackGardenEntomology 🪲

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 13, 2026

@Pepijn@mastodon.online I hope you ate it all the same – it'd be a pity to see all that hard work go to waste 🐈💩

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 13, 2026

Ha – was just reminded of this 🙂

At some point in 2016, we made the customary certificates to thank everyone involved in making ESA’s Rosetta mission to Comet 67P/Churyumov-Gerasimenko such a success 🚀🛰️☄️🎉

But given the amazing engagement & support we’d had from people all around the planet, I decided we should make one more 🌍

So this one’s for you – you all did very well, thanks 🙂🙇‍♂️👏

#SpaceScience #SpaceExploration #Space #RosettaLegacy #LivingWithAComet #Photography

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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Feb 13, 2026

More idiotic Brexit collateral damage to dual citizens.

Yes, many people including my kids have both passports, but as the article describes, not all do & the alternative "certificate of entitlement" is punitively expensive.

And this is under a Labour government. Imagine the scenarios under a far-right one which will positively enjoy punishing any UK citizens living abroad (except their megarich donors who live in Monaco to avoid paying tax).

https://www.theguardian.com/politics/2026/feb/13/dual-nationals-denied-entry-to-uk-british-passport-border-control

View on mastodon.social
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markmccaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
Mark McCaughrean
Mark McCaughrean
@markmccaughrean@mastodon.social

Adjunct scientist, Max Planck Institute for Astronomy, Heidelberg / Former Senior Advisor for Science & Exploration at the European Space Agency / JWST Science Working Group Interdisciplinary Scientist / Co-founder Space Rocks / New worlds ahead / Opinions very much own 

 Now living in a hilly part of Germany & very much missing regular cycling with the wide horizons & big skies of The Netherlands 😢🚴‍♂️

mastodon.social
@markmccaughrean@mastodon.social · Jan 29, 2026

Enter the Dragon 🐉🥋

Here it is – my new JWST image of the young protostellar outflow system in Cassiopeia called HH288, aka The Dragon Jet.

We discovered it in the 1990s & the NASA/ESA/CSA JWST reveals stunning new detail, including several new jets crossing the main dragon 🙂👍

This is a 4K version – you can view & download the full 12K image here: https://www.flickr.com/gp/markmccaughrean/944q5814f8

For more coverage, see this by @DrCarpineti@mastodon.social at: https://www.iflscience.com/dragon-jet-erupts-from-baby-stars-in-stunning-new-jwst-image-82374

#Space #SpaceScience #Astronomy #Photography

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