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sexta-feira, 18 de setembro de 2026
Os relógios Vacheron Constantin no Relógios & Canetas online
Meditações - o tempo não vai existir para sempre
Lido aqui:
Physics has
a decades old equation that describes the entire universe with one glaring
omission, it has no variable for time at all. A new theoretical study from
Brazilian physicist Anderson Gama Fernandes de Freitas at the Universidade
Federal de Itajubá adds a fresh twist to that mystery, suggesting time isn't
just missing from the math by accident, it might be a feature that only exists
under certain conditions, and could eventually fade out entirely.
The root of the problem traces back to 1967, when physicists John Wheeler and Bryce DeWitt tried to combine general relativity with quantum mechanics into a single equation describing the whole universe. What they got, now called the Wheeler DeWitt equation, works mathematically but strips time out completely, a puzzle physicists still call "the problem of time" nearly 60 years later. Wheeler himself, who also coined the term black hole, admitted having an equation is one thing, but actually interpreting what it means is an entirely different, ongoing challenge.
Fernandes de Freitas's new approach proposes that time doesn't function as some fixed universal backdrop, instead it emerges from the geometry and curvature of spacetime itself, essentially acting like a clock built out of the universe's own shape. That has a strange consequence: as the universe continues expanding and flattening over unimaginable timescales, that curvature weakens, and with it, this geometric clock gradually winds down. In this framework, time wouldn't get switched off abruptly, it would slowly lose operational meaning as the conditions that let it exist in the first place fade away.
This sits alongside separate, related work, including a University of Birmingham experiment earlier this year that built a tiny "mini universe" from 24,000 ultracold atoms specifically to test whether time can emerge from a system's internal changes rather than ticking forward on some external master clock. Together, these efforts represent physicists trying to actually test ideas about time that used to live purely in theoretical papers.
Source: Anderson Gama Fernandes de Freitas, Universidade Federal de Itajubá, sciandnature.com
quinta-feira, 17 de setembro de 2026
Os relógios Zenith no Relógios & Canetas online
Salão Watches and Wonders 2027 com presença recorde de marcas
A edição 2027 do salão de alta relojoaria Watches and Wonders, que decorre de 5 a 11 de Abril, terá as seguintes novas marcas: Akhor, Alain Silberstein, Berneron, Breva Genève, Fortis, Kerbedanz, Porsche Design, Singer Reimagined e Stollenwurm, que se juntam à Breitling, Damiani, Gallet e Universal Genève, cuja participação já tinha sido anunciada em Junho.
No total, haverá 75 expositores, com 32 grandes marcas no espaço principal, 27 outras no Carré des Horlogers e as restantes 16 na The Mezzanine.
EXHIBITING BRANDS
A. LANGE & SÖHNE | AKHOR | ALAIN SILBERSTEIN | ALPINA |
ANGELUS | ARMIN STROM |
ARNOLD & SON | ARTYA GENEVE | AUDEMARS PIGUET | BAUME
& MERCIER |
BEHRENS | BERNERON | BIANCHET | BREITLING | BREMONT | BREVA
GENEVE |
B.R.M CHRONOGRAPHES | BVLGARI | CARTIER | CHANEL | CHARLES
GIRARDIER |
CHARRIOL | CHOPARD | CHRISTIAAN VAN DER KLAAUW | CHRONOSWISS
|
CORUM | CREDOR | CZAPEK & CIE | DAMIANI | EBERHARD &
CO. | FAVRE LEUBA |
FERDINAND BERTHOUD | FORTIS | FREDERIQUE CONSTANT | GALLET |
GENUS |
GERALD CHARLES | GRAND SEIKO | GRÖNEFELD | H. MOSER &
CIE. | HAUTLENCE |
HERMÈS | HUBLOT | IWC SCHAFFHAUSEN | JAEGER-LECOULTRE |
KERBEDANZ |
LAURENT FERRIER | L’EPEE 1839 | LOUIS MOINET | MARCH LA.B |
MARCO TEDESCHI |
NOMOS GLASHÜTTE | NORQAIN | ORIS | PANERAI | PARMIGIANI
FLEURIER |
PATEK PHILIPPE | PEQUIGNET | PIAGET | PORSCHE DESIGN |
RAYMOND WEIL |
RESSENCE | ROGER DUBUIS | ROLEX | SINGER REIMAGINED | SINN
SPEZIALUHREN |
STOLLENWURM | TAG HEUER | TRILOBE | TUDOR | U-BOAT |
UNIVERSAL GENÈVE |
VACHERON CONSTANTIN | VAN CLEEF & ARPELS | ZENITH |
Exportações relojoeiras helvéticas - positivas para os últimos doze meses, pela primeira vez em dois anos
As exportações relojoeiras suíças registaram em Agosto um aumento de 9,1 por cento em valor, face a período homólogo de 2025, fazendo com que a média dos últimos 12 meses seja positiva pela primeira vez em dois anos. No acumulado dos oito primeiros meses do ano, as exportações foram 1,7 por cento superiores. Quanto a volume, exportaram-se em Agosto mais 95 mil relógios.
Diz a Federação Relojoeira:
Despite a favourable basis for comparison, exports to the United States declined sharply in August (-19.4%). Conversely, the other main markets grew to a more or less significant degree. The United Kingdom (+46.1%), Japan (+22.1%), China (+15.8%), Hong Kong (+1.4%), Singapore (+8.5%), Germany (+34.0%) and the United Arab Emirates (+6.1%) all increased, benefiting from a favourable base effect. Italy was the exception, posting a marked decline (-40.4%). The results achieved by countries in the European Union must, however, be interpreted with caution: the atypical position of France (+113.5%) could, as the result of a communicating vessels effect, be to the detriment of other markets in the region.Iconografia do tempo - relógio de sol
Susanna Surprised by the Two Elders, 1555. Heinrich Aldegrever, German, 1502 - 1555/1561
quarta-feira, 16 de setembro de 2026
Os relógios Vacheron Constantin no Relógios & Canetas online
terça-feira, 15 de setembro de 2026
Os relógios TAG Heuer no Relógios & Canetas online
Meditações - as duas horas grandes da vida
Nas duas grandes horas da Vida — a nascer e a morrer — o homem bebe sozinho o seu cálice. No trajecto entre os dois pólos, acobardado pela maior consciência da espessura da bruma, arregimenta amigos e companheiros. Mas a sua unidade é ele. Mesmo que consiga ter à volta a maior multidão — vai só.
Miguel Torga - Diário 1937
segunda-feira, 14 de setembro de 2026
Os relógios Speake-Marin no Relógios & Canetas online
O maior produto de conteúdos do seu segmento em língua portuguesa
domingo, 13 de setembro de 2026
Os relógios Singer no Relógios & Canetas online
sábado, 12 de setembro de 2026
Os relógios SevenFriday no Relógios & Canetas online
sexta-feira, 11 de setembro de 2026
Os relógios Seiko no Relógios & Canetas online
Iconografia do tempo - a ampulheta da morte
Jan van de Velde II, Dutch, 1593 - 1641. Claes Jansz Visscher. Publisher, Dutch, 1586/1587 - 1652. Death Taking a Couple by Surprise, National Gallery of Art.
quinta-feira, 10 de setembro de 2026
Os relógios Rolex no Relógios & Canetas online
Um primeiro segundo bissexto negativo?
Earth is
currently rotating slightly faster than normal, which is making the length of a
day shorter by a few milliseconds. Although this change is extremely small and
not noticeable in daily life, it matters a lot for precise global timekeeping
systems that rely on matching atomic clocks with Earth’s natural rotation.
Normally,
Earth’s rotation is slightly slowing down over long periods, so scientists
occasionally add a “leap second” to clocks to keep them aligned. This ensures
that official time stays in sync with the actual position of Earth as it turns.
However,
recent observations suggest that Earth’s spin is not always slowing it can also
speed up slightly due to complex factors like changes in the planet’s core,
ocean currents, atmosphere, and mass distribution.
If this
faster rotation continues, timekeepers may face a rare situation. Instead of
adding a second, they might need to remove one second from clocks, known as a
“negative leap second.” This would be the first time such an adjustment is
applied in history.
Experts emphasize that this is still a prediction based on current trends, not a confirmed future event. The change, if it happens, would be very small but technically challenging for systems like GPS, satellites, banking networks, and global communication, which depend on perfectly accurate time synchronization.
quarta-feira, 9 de setembro de 2026
Os relógios Roger Dubuis no Relógios & Canetas online
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