repepo

@repepo@fediscience.org

I'm a Colombian-American physicist working in Belgium. I'm interested mainly in the fluid dynamics of rotation (i.e. stars, planetary cores, but also toilets and hurricanes). Rock climber and a photography aficionado, mesmerized by mountains and clouds.

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repepo, to science

As a fluid dynamicist, a small mountain brook on a sunny day can be endlessly entertaining.

The shape of the water's surface is determined mostly the fluid's momentum and surface tension. You can see in this 1/2000 secs exposure the whimsical surface's shape, bubbles and capillary waves.

repepo, to Battlemaps

This I found, deep in the .

repepo, to astrophotography

From left to right, AR3600 and AR3599, as imaged during noon today through an infrared filter. You can see the solar granulation too. It is amazing what one can do today with amateur equipment!

repepo, to Battlemaps

From the series In The , a at the last stage of its life, shedding its outer layer.

repepo, to photography

From the series “Astrophysics In The Forest” here a black hole with an accretion disk and its axial relativistic jet.

repepo, to physics

No need no stinkin computers, I’m modeling the freakin large scale evolution of the universe in a cup of tea.

Close up of a cup of tea showing the thermal convection pattern as bright lines twisting and merging capriciously.

repepo, to photography

Bright .

repepo, to physics

Planetary scientist are like

repepo, to random

The Canis Major and Columba as seen from a passenger flying over the Atlantic ocean in the middle of the .

repepo, to astrophotography

#Orion and #Sirius, a #timelapse. The nebula can be seen as well. Dew started forming on the lens soon after starting the exposures.
#astrophotography #astronomy

A timelapse showing the Orion constellation, the Orion nebula can be seen as well. The bright stars develop a halo as dew started forming on the camera lens.

repepo, to colombia

#Landscapes from la Laguna de #Suesca, a quiet place 2800 m high above sea level, and about 70 km north of the intense and busy city of#Bogotá, #Colombia, where I was born.

#Photography #clouds

A hill with some trees in the background, a lake, another patch of land, and another section of the same lake in the foreground. Wooden sticks from an old fence can be seen half-immersed in the water, which reflects them as well as the blue sky above.

repepo, to colombia

Nubes del ocaso.

repepo, to random

Today's on the .

repepo, to Weather

The Belgian solution to gloomy weather. Not totally sure it works …

repepo, to SciComm

Yet another example of misleading science journalism:
https://bgr.com/science/a-supernova-devastated-our-ozone-in-2022-new-study-reveals/

While the actual study merely states that "Gamma-ray bursts ... might deplete stratospheric ozone on a global scale". No other mention of ozone is made:
https://www.nature.com/articles/s41467-023-42551-5

repepo, to random

Happy #CarlSagan day everyone! Here he reads one of his texts on #exploration, animated by artist Erik Wernquist. Timeless!
https://www.youtube.com/watch?v=YH3c1QZzRK4&ab_channel=ErikWernquist-DigitalArtist

repepo, to physics

The bands in are actually cylindrical:
https://www.nature.com/articles/s41550-023-02077-8

repepo, to art

The (Royal Museum of Fine Arts Antwerp) reopened last year after 11 years or renovations. The collection is just fantastic. Here's a taste: Rembrandt, Vermeer, Magritte, Dalí.

image/jpeg
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image/jpeg

repepo, to art

Of course he fell.

repepo,

@Lotje aha! It was on purpose indeed! Thanks for sharing it! 🤩

repepo, to Belgium

A study about the global winter caused by the , led by Cem Berk, a young colleague from the the Royal Observatory of just appeared online:

https://www.nature.com/articles/s41561-023-01290-4

repepo, to Belgium

(not gravitational!) this afternoon over . Most likely caused by a strong vertical wind shear around 2-3km high in the

Zoomed in detail of the wave clouds today over Belgium
Some of the bands appear iridescent!
Wide angle view of the wave cloud train

repepo, to Astro

A "dandelion" g-mode in the core of a :

repepo,

@asbestos @sundogplanets there are reasons to think waves like this exist in the real Sun but so far we don’t have a direct way to detect them. Kind of a hot research topic at the moment 🤩

repepo, to Astro

Today’s as seen through an Hydrogen-alpha filter and a Baader AstroSolar film filter. Lots of detail, the granules can be seen. They are typically 1500 km wide.

repepo,

Here, zooming in a region of the disc away from any , the are clearer.

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