Into the Fourth Dimension: Jacob & Co. Unveils Its Astronomia Revolution Four-Axis Tourbillon

Readers who have been following Watchonista’s special Scrabble the Seconds countdown to Watches and Wonders Geneva 2025 have already gotten a thorough review of the evocative history and ongoing saga surrounding the Astronomia model from Jacob & Co.

So, while Watchonista doesn’t like to play the “prediction game” for watch shows, given today’s product revelation, we feel pretty chuffed that we decided to have our Jacob & Co. Scrabble article focus on the Astronomia.

Now that we’re done tooting our own horn, let’s just cut to the chase: While its aesthetics have a lot in common with the 2023 Astronomia Revolution timepiece, the 2025 Astronomia Revolution represents the use of a first-of-its-kind four-axis tourbillon. Let that sink in, and we will break it down.

A typical triple-axis flying tourbillion sits atop the rotating carousel, completing a full revolution in 60 seconds, with the two additional axes completing rotations at 18 and 15 seconds, respectively. Basically, a triple-axis flying tourbillon is a tourbillon that rotates on three different axes (shocking, we know).
 

Building upon this, the watchmaking wizards at Jacob & Co. mounted an entire triple-axis flying tourbillon array on its own spoke of the watch’s rotating automaton, thus creating a “fourth dimension.”

Scientifically speaking, an object’s length, width, and height represent the three dimensions. However, there is still a bit of debate about the fourth dimension and whether it is an object’s movement through or its movement through space. Either way, it’s an apt metaphor given the rotational flight path of the Astronomia’s central animation.
 

Horologically, the votes may still be out on the benefits of a fourth tourbillon axis (it certainly spreads the gravity-fighting spinning effect across the whole of the watch dial), but this is Jacob & Co. – a bit of bombast never hurt anybody and only adds to the fun.

The Astronomia Revolution Four-Axis Tourbillon eschews the collection’s usual construction of three or four animated spokes radiating from the dial’s center for just two: One dedicated to swinging the triple-axis flying tourbillon mentioned above around the dial and one for carrying the luxuriously colorful hour-and-minute sub-dial along its cosmic path.
 

The expected visibility of the entire Astronomia line is in full effect, with a 360-degree side view into the uncanny watch works as well as the crystal clear top-down view of the 47mm 18k rose gold timepiece.

Of course, on the 2023 Astronomia Revolution, the showstopping feature was the dial “floor,” which consisted of highly polished gold hexagons (inspired by the far-flung James Webb space telescope).
 

For this new Astronomia execution, those 5N gold mirrored pieces form a much more textured, shimmering mosaic by placing them in an unexpected inverted layout, creating a crystalline angularity that fills the entire dial surface and maximizes play with light. It is stunning, to say the absolute least.