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Writer's pictureSílvio Pereira

Time in "A Brief History of Time" by Stephen Hawking

By: Silvio Pereira


 



 

Time in "A Brief History of Time" and Its Relation to the Art of Watchmaking


Stephen Hawking’s iconic A Brief History of Time takes us on a journey through fascinating concepts that go beyond physics and cosmology, touching on philosophical and existential questions about the very nature of time. Published in 1988, the book revolutionised the way we understand the universe, simplifying complex ideas such as the Big Bang theory, black holes and relativity for a wider audience. Although these ideas may seem far removed from the world of watchmaking, a closer look reveals a symbolic and practical connection between the two worlds.


Time in Hawking's Universe


Hawking describes time as a dimension interconnected with space, forming space-time, a fabric that can be deformed by gravity. Before Einstein's theory of relativity, time was considered absolute, a straight and universal line that advanced uniformly for everyone. However, Einstein showed that time is relative, changing according to the speed and gravitational field of an observer.


In the book, Hawking addresses the "arrow of time" , a concept that separates past, present and future. This arrow has three manifestations:

Arrow of time

  1. The thermodynamic arrow : Related to the second law of thermodynamics, according to which entropy, or disorder, tends to increase, making time irreversible.

  2. The psychological arrow : Linked to our perception of time, which flows only in one direction.

  3. The cosmological arrow : Associated with the expansion of the universe, which suggests a specific direction for time.


These concepts confront us with the idea that time, as we perceive it, may be a construct of our experience. In the extreme conditions of a black hole, for example, time almost "freezes" for an outside observer. And, even more intriguing, Hawking suggests that in the earliest moments of the universe, time may have been indistinguishable from space, a phenomenon described by the "no-boundary condition."


The Connection with Watchmaking


Faced with such grand and abstract concepts, what can a watch represent? Watchmaking, as a science and art, plays the role of making time something tangible, something we can measure, observe and appreciate.



The first clocks, such as solar clocks, depended directly on astronomical cycles. With the development of mechanical watchmaking and, later, electronics, man improved his ability to measure increasingly smaller fractions of time. This desire for precision parallels the efforts of physics to understand time more accurately, ranging from Newton's laws to the modern theories of Einstein and Hawking.


One of the most important developments in this field is the atomic clock , a technological milestone based on quantum physics. These devices measure time by the vibration of atoms, achieving extraordinary precision. Interestingly, atomic clocks are also used to test the theory of relativity. For example, GPS satellites correct their clocks to compensate for the gravitational and velocity effects described by Einstein (as we mentioned in the article: "The Relativity of Time and Time in Relativity"), proving that time flows differently depending on the conditions.


Philosophical Inspiration in Haute Horlogerie


In addition to functionality, watchmaking also has an artistic and philosophical facet that echoes Hawking’s ideas. Watches with astronomical complications, for example, celebrate the connection between the human microcosm and the macrocosm of the universe. Examples include models that represent the phases of the moon, the orbit of the planets and the equations of time, combining precision mechanics with a poetic vision of the cosmos.


These instruments don’t just measure time; they also connect us to its essence. When we gaze at an astronomical clock, we are reminded that the time we mark in seconds, minutes and hours is merely a projection of something much larger, something that shapes the fabric of the universe itself.


Time as Enigma and Art


Hawking presents time as a mysterious dimension, full of paradoxes and possibilities. Watchmaking, on the other hand, domesticates this concept, transforming it into something tangible, an object we can wear and admire. But ultimately, both worlds share a common goal: to explore, understand and honor time.


The book A Brief History of Time teaches us that time is both a physical reality and a human experience. It is not only measured, but also felt, lived and, often, admired. For watch lovers, this broadens the idea of what it means to own and wear a watch. It is not just a device for managing everyday life, but a symbol of the human attempt to capture the essence of something so fleeting and yet so eternal.


Thus, each tick of a clock is not just a fraction of a second passing; it is a celebration of the relationship between man and the universe, an echo of Hawking's reflections on the nature of time and our never-ending quest to understand it.

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