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Burr Ito @ututuy.org · 06/09/2026

Ventana en el museo San Telmo, Donostia, España.

A tall window at the center of the picture, rounded top, rectangular bottom. We can see the blue sky outside, and a small cloud. The rest inside the room is dar.

Burr Ito @ututuy.org · 06/09/2026

There are waves in the sky. If there's a contrast in density, whether sharp (as at the interface between a body of water and the air above it), or gradual (as in the atmosphere itself, with denser air at bottom, lighter air above), chances are we can see gravity (not gravitational!) waves there.🧪⚛️

Picture of a cloud with wavy patterns and a blue sky background

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Burr Ito @ututuy.org · 21/08/2026

We live in a fast spinning rock in space. I can almost feel vertigo! 3/3

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Burr Ito @ututuy.org · 21/08/2026

And here's the view towards the Southwest, our own galaxy, the Milky Way. The interstellar dust is clearly visible but it blocks most of the view towards the galactic center, which is is just below the mountain skyline. 2/3

A pic showing a dark mountain skyline, with the Milky Way going diagonally from top left to bottom right. It appears as a bright band with irregular dark areas inside.

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Burr Ito @ututuy.org · 21/08/2026

A dark sky place deep in the Spanish #Pyrenees. From here you can see the south face of the Vignemale, a 3298 m peak, illuminated by a setting moon. Near the center of the image is the Andromeda Galaxy, much farther than any other star in the pic. Towards the left is Perseus' double cluster. 🔭 🧪 1/3

A rocky mountain at night with a starry night sky as a background.
This is a 30" exposure at f2.8, ISO3200, with a 2.8 mm lens.

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Burr Ito @ututuy.org · 14/08/2026

A bit late but this is what the eclipse looked like from Belgium. In about two weeks (28th of August), the lunar nodes are still aligned with the sun and we will have a moon eclipse! 🧪 🔭

Pic of three stages of the eclipse, at the right when the moon was entering, middle close to the max occultation (as seen from Belgium), and the right when the moon was leaving. You can see a few sunspots on the solar disc.

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Burr Ito @ututuy.org · 14/08/2026

uh-oh, this is in my garden.

An asian hornet wasp nest, hanging about 18 m up from a pine tree branch, photographed from below. It is round-ish, light beige color, with some wasps walking around.

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Burr Ito @ututuy.org · 13/08/2026

My daughter projecting the eclipse through not just one but two colanders! 🧪 🔭

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Burr Ito @ututuy.org · 07/08/2026

A gas giant planet like #Jupiter can 'pulsate' at many different frequencies. We call them 'eigenmodes'. This is how one such #eigenmode might look like. They can be excited by the tidal pull of Jupiter's moons as they orbit the #planet. I will present this work at #EPSC2026 🧪 🔭

a panel showing the amplitude of a pulsation in a gas giant planet in three different directions (radial, north-south, and azimuthal). Blue is no motion, red is max motion. The pattern of the pulsation motion is symmetrical across the equator, and it's a bit checkered-like, with some voids too, forming what I think are beautiful patterns.

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Burr Ito @ututuy.org · 05/08/2026

Teufelsberg, Berlín.

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Burr Ito @ututuy.org · 28/07/2026

Some high and iridescent clouds close to the Sun as it sets today. You can see some gravity wave patterns too. 🧪⚛️

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Burr Ito @ututuy.org · 23/07/2026

I received today my Klein bottle, made by the legendary Cliff Stoll. So happy! #Mathematics 🧪

A glass bottle on a table. But it's a special bottle because it ihas no inside or outside, it's one sided! its neck extends up and to a side and then goes back into the bottle joining its base.

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Burr Ito @ututuy.org · 12/07/2026

Cirrus clouds above me

Cirrus clouds directly above me. They are wispy white clouds against a blue sky. They are common these days of hot weather in Belgium.

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Burr Ito @ututuy.org · 01/07/2026

One of the largest #sunspot groups of the current #solar cycle, AR4478, here as imaged today from Hoogstraten, #Belgium. It sits pretty much at the center of the solar disc at this moment. And it's really big, about 16 Earth diameters from side to side! 🧪 🔭 #astrophotography

Telescope image of a region of the solar disc, near the center. It shows two large sunspots, dark in their center and their edges have a spaghetti-like structure. The rest of the image show the solar surface completely covered with much smaller "granules" caused by vigorous convection at the surface. The granules are typically a few thousand km across.

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Burr Ito @ututuy.org · 29/06/2026

Two types of #clouds, dark ones in the foreground and bright ones in the background. The bright ones are #noctilucent clouds, near 80km high. This is around midnight from #Belgium. Clouds are illuminated by the Sun, not too far from the horizon this time of the year. 🧪 🔭

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Burr Ito @ututuy.org · 27/06/2026

The heavy #thunderstorm hitting the #Netherlands today's evening, as seen from 100 km south. Here in Belgium we have a severe thunderstorm warning, we expect also heavy rain soon.

Towering storm clouds as the sun sets. You can see clearly the clouds' shadow outline projected onto other, more dispersed, clouds.

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Burr Ito @ututuy.org · 21/06/2026

A pretty big bad #thunderstorm over whole Flanders in #Belgium rn.

Screenshot of radar weather map showing a very intense thunderstorm extending over the whole Flanders in Belgium.

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Burr Ito @ututuy.org · 19/06/2026

Walking around the #mountains I came across the rock that inspired #Magritte 's "Le Château des Pyrénées" #art

Picture of a large boulder, seemingly in mid air over a grassy field in the mountains. There's a person standing on the grass. There are clouds behind the boulder.
In reality this is a picture of a rock on a lake, but upside down.

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Burr Ito @ututuy.org · 17/06/2026

#Venus almost occulted by the #Moon today, as seen from #Belgium. 🧪 🔭

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Burr Ito @ututuy.org · 13/06/2026

Acariciando al elefante seguro que no es mera coincidencia

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Burr Ito @ututuy.org · 10/06/2026

A #thunderstorm over The Hague, the Netherlands, last night, as seen from about 100 km south. This is around midnight. City lights and lightning illuminate the storm #clouds. But there's also a hint of #noctilucent clouds in the background. 🧪

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Burr Ito @ututuy.org · 04/06/2026

This is what a heavy #thunderstorm loos like from a distance. We seldom get to see the strong #convective motion. In a very unstable #atmosphere warm and very humid air near the surface rise up. This passed just a couple of kilometers from my house today. 🧪 ⚛️

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Burr Ito @ututuy.org · 30/05/2026

Some #mammatus #clouds this afternoon. These are part of the heavy thunderstorm system that just hit the #Brussels area. 🧪

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Burr Ito @ututuy.org · 29/05/2026

The pattern in the clouds is called a "Von Kármán vortex street". Their size is roughly 100 km. Very interestingly, the same pattern can be recreated at a much much smaller scale. Here they are, just a few centimeters across, visualized using a rheoscopic fluid: [2/2]

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Burr Ito @ututuy.org · 29/05/2026

This is what the clouds around the Canary Islands look like at this moment. 🧪 [1/2]

Satellite image of the clouds around the Canary Islands. The wind makes a pattern of alternating clouds vortices as it goes over the mountains in the islands. That pattern is called a "Von Kármán vortex street"

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Burr Ito @ututuy.org · 25/05/2026

The Sea of Vapors (Mare Vaporum) on the moon. Lots of rilles (channels), and mountains. 🔭 🧪 #astrophotography

Pic of the moon around Mare Vaporum. Towards the top left corner is the Apennines montes range, and towards the top left is Mare Serenitatis. In the Mare Vaporum plain itself there are a few rilles visible, particularly the Hyginus rille, near the center of the pic along with crater Manilius.

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Burr Ito @ututuy.org · 25/05/2026

The Apenninus mountains near the Apollo 15 landing site, as seen from my garden tonight. 🧪 🔭 #astrophotography

Telescope image of the moon, showing the mountains separating Mare Imbrium and Mare Serenitatis. Many craters can be seen, particularly crater Archimedes, towards the left, with 81 km in diameter and filled with lava.

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Burr Ito @ututuy.org · 18/05/2026

Today the Moon and Venus are only a few degrees apart. Here's a 20 sec timelapse, spanning about 30 min real-time. 🧪 🔭

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Burr Ito @ututuy.org · 18/05/2026

I want to talk like lovers do

Flemish landscape with clouds and an intense rain coming.

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Burr Ito @ututuy.org · 17/05/2026

A “reverse” contrail, i.e. the clouds clear briefly along the plane’s path (not from a plane going backwards lol). I don’t see this often. 🧪

A plane flies through a thin layer of clouds, leaving a momentary clear air trace behind.

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Burr Ito @ututuy.org · 02/05/2026

That the sun is a star like the ones we see at night is something that will never stop being astonishing to me. Its surface has a texture, the solar granules, which are the result of very strong convective motion. The sunspots are magnetic anomalies, a bit cooler than their surroundings. 🧪 🔭

Partial image of the solar disc using a telescope and an infrared filter (IR 850 nm pass filter). The sun appears yellow and with a sort of texture (the solar granules). There are also some sunspots. In the center of the pic is the sunspot group denominated AR 4225.

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Burr Ito @ututuy.org · 01/05/2026

It’s really sunny 🧪🔭

In the foreground a laptop computer screen showing a telescope image of the sun. In the background is the telescope with its solar filter.

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Burr Ito @ututuy.org · 24/04/2026

Sometimes, when the end justify the means, the thing becomes a caricature of itself. Here in #mountaineering, but many analogies in #academia with their the indiscriminate use of LLM's and the #PublishorPerish culture. Re: www.bbc.com/news/article...

screenshot of a text fragment that reads: "We are thinking about airlifting the rope-fixing team and their logistics to Camp 2 by helicopter, so they can open the route above that altitude for now," Ram Krishna Lamichhane, the department's director general, said.

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Burr Ito @ututuy.org · 19/04/2026

The #moon is very close to the #Pleiades today. With strong #Earthshine too. Here's a #timelapse as it sets. If you pay close attention you can see the relative motion of the moon against the stars. 🔭 🧪 #astrophotography

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