The multiverse: science or fiction

Les multivers : science ou fiction

IN BRIEF Multiverse: scientific concept regarding the existence of multiple universes. Parallel dimensions: possibility of variations within the same universes. Cosmological theories: scientific foundations of the multiverse idea. Fiction: widely explored in literature, cinema, and television. Metaverse: distinction between created virtual universes and natural universes. Science and fiction: ongoing debate about the reality of the … Read more

The great discoveries of the Planck satellite

Les grandes découvertes du satellite Planck

IN BRIEF Satellite Planck launched in 2009 by the European Space Agency. Objective: to map the anisotropies of the cosmic radiation. Discovery of a supercluster of galaxies through its imprint on the cosmic background radiation. Analysis of the cosmic microwave background, light emitted 380,000 years after the Big Bang. Onboard instruments: Low Frequency Instrument (LFI) … Read more

The concept of time in cosmology

Le concept de temps en cosmologie

IN BRIEF Cosmic time: central concept in cosmology to model the universe. History of objects: each element of the universe has its own temporal journey. Cosmological models: assume uniformity and isotropy of the universe. Coordination of events: necessary interaction between time and space to structure the universe. General relativity: revolutionized the perception of time in … Read more

Dark energy and its role in the universe

L'énergie sombre et son rôle dans l'univers

IN BRIEF Dark energy: makes up about 68% of the Universe. Accelerates the expansion of the Universe due to its repulsive nature. Dark matter and dark energy: two great mysteries of astrophysics. Recent progress shows that the expansion of the Universe is faster than expected. Use of telescopes like Hubble and Euclid to study these … Read more

Dark matter: the great cosmological mystery

La matière noire : la grande énigme cosmologique

IN BRIEF Dark matter makes up about 85% of the mass of the Universe. It is invisible and undetectable, making its study complex. Represents one of the biggest mysteries of modern cosmology. Its existence is necessary to explain the movement of galaxies. Theories like modified gravity attempt to unravel this mystery. Less than 5% of … Read more

The expansion of the universe: why and how

L'expansion de l'univers : pourquoi et comment

IN BRIEF Expansion of the Universe: phenomenon of galaxies moving away from each other. Observation by Edwin Hubble in 1929 on distance and redshift. Dynamic spaces: influence of gravity on space-time. Speed of expansion and its impact on cosmology. Origin of the Universe: about 13.8 billion years ago. Big Bang Theory and its implications for … Read more

What is the Big Bang? Theories and evidence

Qu'estce que le Big Bang ? Théories et preuves

IN BRIEF Big Bang: Cosmological model on the origin of the Universe. Describes the evolution of the Universe from a dense and homogeneous state. Observational evidence, such as the cosmic microwave background. Explained by the abundance of primordial helium. Diverse data sources corroborate the theory. Scientific consensus on the birth of the Universe from the … Read more

The impacts of major astronomical discoveries on science

Les impacts des grandes découvertes astronomiques sur la science

IN BRIEF Scientific advances : Revolutionizing our understanding of the universe. Expansion of horizons : Discoveries that redefine our place in the cosmos. Inventions and discoveries : Technical innovations boosting astronomical observation. Influence of Galileo : Establishment of rigorous scientific methods. The Copernican system : Simplification of astronomical models, changing the perception of Earth. Consequences … Read more

Amateur astronomy: equipment and first steps

L'astronomie amateur : matériel et premières étapes

IN BRIEF Contemplation of the clear night sky Learning to navigate in the sky Purchasing a pair of binoculars to get started Choosing a telescope suited to your needs Understanding constellations and stars Exploring different types of observation Astronomical photography to capture views Basic concepts and essential equipment to start Regular observations and practice to … Read more

Astrobiology: understanding the possibility of life elsewhere

L'astrobiologie : comprendre la possibilité de la vie ailleurs

IN BRIEF Astrobiology: study of extraterrestrial life. Analysis of geochemical and biochemical factors conducive to life. Search for habitable exoplanets in the universe. History: from antiquity to the present, a continuous quest. Scientific challenges to detect life elsewhere. Impact of discoveries on our understanding of life on Earth. Astrobiology is a fascinating discipline that explores … Read more