Estação Cronográfica

segunda-feira, 28 de setembro de 2026

Indies NYC - relojoeiros independentes expõem em Nova Iorque

1776 Atelier — Texas, United States — Jason Lu & Zach Smith

Artur Akmaev — California, United States

Atelier Pieters — Les Hauts-Geneveys, Switzerland — Maarten & Jessica Pieters

Bradley Taylor — North Vancouver, Canada

Delaloye Genève — Geneva, Switzerland — Nicolas Delaloye

Dunselman Watchmaking — Zwolle, Netherlands — Annelinde Dunselman

Felipe Pikullik — Berlin, Germany

Garrick — Norfolk, England — David Brailsford & Simon Michlmayr

Holthinrichs Watches — Delft, Netherlands — Michiel Holthinrichs

Jean Khatchadourian — La Chaux-de-Fonds, Switzerland

Kallinich Claeys — Glashütte, Germany — Johannes Kallinich & Thibault Claeys

LEGARE — La Chaux-de-Fonds, Switzerland — Wei Koh & Guillaume Têtu

MANTEIO — Switzerland — Alex Goetschi

Marco Tedeschi — Gland, Switzerland

Marcu Genève — Geneva, Switzerland — Jérôme Marcu

Mermont — Sebastian Bey-Haut — Geneva, Switzerland

Reima Koivukoski — Helsinki, Finland

Sarpaneva — Helsinki, Finland — Stepan Sarpaneva

Statera Atelier — Maringá, Brazil — Rafael Guimarães & Antonio Almir dos Santos Neto

Stéphane Pierre — Annecy, France

Tan Zehua — Shenzhen, China

TAOS — Geneva, Switzerland — Olivier Gaud, Olivier & Dominique Vaucher

A.T. CREATION — France — Martin Tirello

VonKa & Berna — Sainte-Croix, Switzerland — Corentin Von Kaenel & Aaron Bernasconi

Zeitwinkel — Saint-Imier, Switzerland — Ivica Maksimovic, Peter Nikolaus, and Albert Edelmann

On the road, again...

Os relógios Hermès no Relógios & Canetas online

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Janela para o passado - Instituto Pasteur de Lisboa, 1913

Time is not the steady, universal thing we imagine

Lido no Astrophilesz

Time is not the steady, universal thing we imagine. It bends, stretches, and in the right conditions, breaks down entirely. And this is not science fiction. It is Einstein's relativity, tested and confirmed countless times.

Start with speed. The faster you move, the slower time passes for you compared to everyone else. This is called time dilation, and it is real enough that we correct for it every day. The GPS satellites guiding your phone move so fast, and sit so far from Earth's gravity, that their clocks tick at a slightly different rate than clocks on the ground. If engineers did not account for this relativistic shift, your navigation would drift off by kilometers within a day.

Gravity does the same thing. The stronger the gravitational field, the slower time flows. Near a massive object, time literally runs slower than it does far away. This means your head, being slightly farther from Earth's center than your feet, ages an almost impossibly tiny fraction faster over a lifetime. It sounds absurd, but it has been measured with atomic clocks placed at different heights.

Now push this to the extreme. Near a black hole, gravity becomes so intense that time slows dramatically. If you watched a friend fall toward the event horizon, the boundary of no return, you would see them appear to freeze, their motion stretching out slower and slower, their light fading, seemingly suspended forever at the edge. From their own perspective, though, they would fall right through in an instant.

And at the very center, the singularity, the mathematics of physics simply breaks. Gravity climbs toward infinity, spacetime curves without limit, and our equations stop giving sensible answers. In a very real sense, our current understanding of time ceases to apply there. It is one of the greatest unsolved frontiers in physics, the place where Einstein's relativity and quantum mechanics collide and neither fully works.

The takeaway is humbling. There is no single universal clock ticking for everyone. Your time is truly your own, shaped by how fast you move and how much gravity surrounds you.

Meditações - a vida é um intervalo

Virgílio Castelo

domingo, 27 de setembro de 2026

12ª Bienal do Património Relojoeiro

Grande Prémio de Relojoaria 2025 - Museu do Relógio de Serpa recebe o galardão

Ainda o Grande Prémio de Relojoaria 2025, organizado pelo Anuário Relógios & Canetas. Por motivos logísticos, depois de entregues os diplomas, só agora nos foi possível ir entregando os troféus. Neste caso, Eugénio Tavares d'Almeida recebe o referente ao Prémio Especial do Júri, que no ano passado distinguiu o Museu do Relógio, fundado pelo seu pai, António Tavares d'Almeida.

Os relógios Greubel Forsey no Relógios & Canetas online

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Janela para o passado - gasolina americana, Lisboa, 1913

O que é um zeptosegundo?

Do Facebook:

A zeptosecond is so absurdly small that comparing it to one second is like comparing one second to the age of the universe.

This is not just a tiny fraction of time.

It is a scale so extreme that it completely destroys human intuition.

In 2020, scientists at Goethe University Frankfurt measured a zeptosecond for the first time ever by observing how long it takes a photon of light to pass through a hydrogen molecule.

The result was 247 zeptoseconds.

That made it the shortest interval of time ever directly measured by humans — the fastest event ever captured in a laboratory.

To understand how small that is:

a zeptosecond is to a second what a second is to about 31.7 trillion years.

The universe is only 13.8 billion years old.

That means a single second contains more zeptoseconds than the age of the universe multiplied thousands of times.

And yet… this still may not be the true bottom of time.

Physicists think the smallest meaningful unit could be the Planck time — about 5.4 × 10⁻⁴⁴ seconds.

Below that scale, space and time may stop behaving like anything we understand.

Our current laws of physics simply break down.

So even though we can now measure light crossing a molecule… we are still nowhere near the deepest limit of reality.

We have learned how to watch time on scales almost too small to imagine. But the real question is:

If time itself has a smallest possible unit… then is reality truly continuous — or is the universe running on tiny indivisible frames?

Há 75 anos - morre Augusto de Vasconcelos, Presidente da Liga das Nações

Recordando Augusto de Vasconcelos, médico de formação, primeiro Ministro dos Negócios Estrangeiros da República, Primeiro-Ministro, Embaixador, Presidente da Liga das Nações. Faleceu a 27 de Setembro de 1951, há precisamente 75 anos. O artigo que escrevemos sobre ele para a revista dominical do Público, de 17 de Setembro de 1995. Quando Freitas do Amaral foi eleito Presidente da Assembleia Geral das Nações Unidas, a entidade que substituiu a Sociedade das Nações.

Meditações - um Deus relojoeiro

in Boletim Paroquial de Esposende, Janeiro de 1971 (arquivo Fernando Correia de Oliveira)

sábado, 26 de setembro de 2026

Os relógios Glashütte Original no Relógios & Canetas online

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Janela para o passado - Casa Havaneza, Lisboa, 1913

Relógio mealheiro (sd) - sem moeda não há corda

Anúncio ao "relógio mealheiro" da Sociedade Portuguesa de Seguros (contribuição de Isabel Campos), Só é possível dar-lhe corda depois de, diariamente, se lhe introduzir uma moeda, incentivando à poupança.

O museu Chapas, no Barreiro, tem um exemplar desses relógios, da companhia de seguros A Mundial (arquivo Fernando Correia de Oliveira)

Já aqui tínhamos referido o relógio mealheiro, publicidade de 1953 (arquivo Fernando Correia de Oliveira)

Meditações - nunca o relógio andou tão devagar...

in O Espozedense, de 28 de Abril de 1934 (arquivo Fernando Correia de Oliveira)

sexta-feira, 25 de setembro de 2026

Os relógios Frederique Constant no Relógios & Canetas online

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Janela para o passado - bilhetes postais ilustrados, Lisboa, 1913

Iconografia do tempo

(arquivo Fernando Correia de Oliveira)

Meditações - a empurrar pra diante o tempo

Momento de Poesia

Se me ponho a trabalhar

e escrevo ou desenho,

logo me sinto tão atrasado

no que devo à eternidade,

que começo a empurrar pra diante o tempo

e empurro-o, empurro-o à bruta

como empurra um atrasado,

até que cansado me julgo satisfeito;

e o efeito da fadiga

é muito igual à ilusão da satisfação!

Em troca, se vou passear por aí

sou tão inteligente a ver tudo o que não é comigo,

compreendo tão bem o que não me diz respeito,

sinto-me tão chefe do que é fora de mim,

dou conselhos tão bíblicos aos aflitos

de uma aflição que não é minha,

dou-me tão perfeitamente conta do que

se passa fora das minhas muralhas

como sou cego ao ler-me ao espelho,

que, sinceramente não sei qual

seja melhor,

se estar sozinho em casa a dar à manivela do mundo,

se ir por aí a ser o rei invisível de tudo o que não é meu.

Almada Negreiros

quinta-feira, 24 de setembro de 2026

Os relógios Cuervo y Sobrinos no Relógios & Canetas online

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Janela para o passado - lotarias, Lisboa, 1913

Um segundo a menos, e não a mais...

Lido aqui:

For the entire history of precise timekeeping, we have only ever added time to our clocks. Now, for the first time, we may have to take a second away.

The reason is strange and a little unsettling. Earth is spinning faster than it used to. Our planet has never been a perfect clock. Its rotation naturally wobbles, and for decades the long term trend was a gradual slowing, mostly caused by the Moon's tidal pull. To keep our atomic clocks in sync with the actual turning of the planet, timekeepers occasionally added a leap second. Between the 1970s and 2016, they did this 27 times.

Then something flipped. Around 2016 to 2018, scientists noticed Earth had quietly started speeding up. Movements deep in the planet's molten core appear to be the main driver, subtly changing how fast the whole world turns. The days are now occasionally coming in a hair shorter than 24 hours, by a millisecond or two.

If this continues, our clocks will drift slightly ahead of the planet, and to correct it timekeepers would need to remove a second rather than add one. This is called a negative leap second, and it has never been done. Current estimates point to around 2029 as the possible moment.

There is a fascinating climate twist buried in this. The rapid melting of polar ice is shifting mass from the poles toward the equator, which actually slows the spin a touch, like a skater extending their arms. Researchers calculate that without that ice melt, we might have needed this adjustment as early as 2026. Human driven warming is, in a small way, tugging on the length of our day.

Not everyone agrees it will happen, since the core's behavior is unpredictable. And the effect is tiny for daily life. But for the computers that run banking, power grids, and the internet, subtracting a second is genuinely tricky, because software was only ever built to add.

If Earth can speed up and slow down beneath our feet without us feeling a thing, how much of the world do you think is quietly shifting that we never notice?

Source: Nature, Duncan Agnew, Scripps Institution of Oceanograph