The role of physics in modern astronomy

Le rôle de la physique en astronomie moderne

IN BRIEF Modern astronomy: study of celestial objects and their properties. Galileo: pioneer who laid the foundations of modern science. Universal gravitation: discovery integrating different physical approaches. Atomic physics: fundamental for understanding the Universe. Astronomical observations: keys to exploring other planets and life. Links between physics and astronomy: unification of disciplines to explain the origin … Read more

The connections between quantum physics and cosmology

Les connexions entre physique quantique et cosmologie

IN BRIEF Quantum physics and cosmology were born at the beginning of the 20th century. Quantum cosmology describes the early moments of the Universe. The concept of quantum multiverse suggests an infinity of universes. Quantum gravity raises many questions about the nature of the Universe. Big Bang and particle physics: essential links. Projects on loop … Read more

String theory: an introduction

La théorie des cordes : une introduction

IN BRIEF String theory: fundamental theoretical framework in physics. The fundamental objects are vibrating strings. Elementary particles correspond to the different vibrations of the strings. Famous for its ambition to be the “theory of everything”, unifying the forces of nature. Involves 11 dimensions in some formulations. A popularization necessary to make science accessible. Exploration of … Read more

Hidden dimensions in theoretical physics

Les dimensions cachées en physique théorique

IN BRIEF Hidden dimensions in the Universe: concepts and theories. Mechanism to confer mass to neutrinos. Physics of particles confined on surfaces called branes. Exploration of hidden variables in quantum physics. Kaluza-Klein theory and extra dimensions. Search for standard model particles and the graviton. Links with concepts of multiverse and time travel. Seeks to solve … Read more

Holographic principle in physics: is everything surface?

Le principe holographique en physique : tout est surface ?

IN BRIEF Holographic principle: central concept in theoretical physics. Suggests that the information of a system can be represented on its surface rather than within its volume. Related to the study of black holes and their event horizon. Indicates a relationship between gravity and quantum. Suggests that our universe could be similar to a hologram. … Read more

Black holes: physics and mysteries

Les trous noirs : physique et mystères

IN BRIEF Definition: Celestial objects in an intense gravitational field. Formation: Collapse of a massive star at the end of its life. Singularity: Central point where mass is concentrated. Dark matter and dark energy: Mysteries related to their presence around black holes. General relativity: Theoretical framework for studying the properties of black holes. X-ray telescopes: … Read more

The cosmology and the origin of the universe

La cosmologie et l'origine de l'univers

IN BRIEF Big Bang : a cosmic event marking the origin of the Universe according to the current cosmological model. Origins of the Universe : study of the conditions that preceded and followed the Big Bang. Formation Eras : the Universe evolved through the radiation era, then the matter era. String Theory : suggests that … Read more

The role of black holes in the universe

The role of black holes in the universe

IN BRIEF Definition: Celestial objects with intense gravitational fields. Composition: Very compact, high mass/size ratio. Role: Impact on galaxy growth. Event horizon: The limit beyond which nothing can escape. Time travel: The gravity of a black hole allows for time dilation. Environment: Influence on galactic structures and their dynamics. Scientific research: Studies conducted to understand … Read more

Understand the formation of stars

Understand the formation of stars

IN BRIEF Birth of stars: Formation from the gravitational collapse of a nebula. Protostars: Clouds of gas that continue to collapse to develop a star. Composition: Balls of gas primarily made of hydrogen and helium. Process: Gravitational collapse of interstellar clouds. Stellar evolution: Life cycle encompassing the birth, evolution, and death of stars. Ongoing formation: … Read more