検索キーワード： 宇宙論

Trous noirs, exoplanètes, les nouvelles techniques d'observation en astronomie ont permis d'extraordinaires découvertes. Une résolution beaucoup plus fine des images. Durant les dernières décennies, de nouveaux instruments d'observation situés sur Terre et dans l'espace ont, grâce à des progrès dans la résolution des images, donné lieu à des découvertes extraordinaires. Trous noirs et exoplanètes : des découvertes extraordinaires. Pierre Léna décrit ici ces innovations instrumentales et s'attarde sur deux découvertes majeures récentes.

Do we live inside a simulated reality or a pocket universe embedded in a larger structure about which we know virtually nothing? Is consciousness a purely physical matter, or might it require something extra, something nonphysical? According to the philosopher Eric Schwitzgebel, it’s hard to say. In The Weirdness of the World, Schwitzgebel argues that the answers to these fundamental questions lie beyond our powers of comprehension. We can be certain only that the truth—whatever it is—is weird.

「はじめに」より 本書で紹介する宇宙思考のポイントは、次の3つです。①宇宙において、見えるもの、そして知ることができることは、視点に依存しており、視点に限られています。

L'Univers a-t-il une forme ? En s'intéressant au contenu visible de l'univers, aux planètes, aux étoiles et aux galaxies, on oublie parfois le contenant invisible, l'espace lui même. Celui-ci est-il un simple réceptacle passif ? A-t-il une forme, une structure ? Est-il fini ou infini ? Est-il courbe, plat, lisse ou grumeleux ?Une présentation des différents modèles cosmologiques. Jean-Pierre Luminet présente les grandes lignes des démarches cosmologiques actuelles et des formes possibles de l'univers.

Jean Pierre Luminet nous invite à un voyage fascinant qui, de la Grèce antique à nos jours, explore les métamorphoses de l'infini. De manière toujours accessible, il aborde l'infini de l'espace avec la cosmologie, celui des nombres avec les mathématiques et les mystères de l'infiniment petit dans la matière avec la physique quantique.

Plants are commonly considered immobile, in contrast to humans and other animals. But vegetal existence involves many place-based forms of change: stems growing upward, roots spreading outward, fronds unfurling in response to sunlight, seeds traveling across wide distances, and other intricate relationships with the surrounding world. How do plants as sessile, growing, decaying, and metamorphosing beings shape the places they inhabit, and how are they shaped by them?

Un Univers en expansion - La cosmologie est l'étude de l'Univers dans son ensemble. En expansion depuis 15 milliards d'années, son histoire est jalonnée d'événements cosmiques : fabrication de la matière, génération du rayonnement cosmologique, apparition des galaxies... La cosmologie est aujourd'hui devenue une science, relativiste depuis le début du XX° siècle.Une histoire de nos nos connaissances sur l'Univers. Marc Lachièze-Rey retrace ici les grandes lignes de l'évolution des idées et des principes qui fondent nos connaissances sur l'Univers.

Edwin Powell Hubble (November 20, 1889 - September 28, 1953), born in Marshfield, MO, was an American astronomer who played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology. Hubble proved that many objects previously thought to be clouds of dust and gas and classified as "nebulae" were actually galaxies beyond the Milky Way. Hubble's name is most widely recognized for the Hubble Space Telescope, which was named in his honor. The following is a 1945 recording of Hubble's lecture at the New York Philharmonic.

2023 Nautilus Gold Award Examines our emergence as self-aware members of a Universe that is itself a unified and innately sentient entity that exists TO evolve Shares leading-edge scientific breakthroughs and shows how they support traditional visions of Earth as a living being--Gaia...

When asked to explain Relativity simply, Albert Einstein himself once joked, “Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That's Relativity.” But when most normal people without advanced training attempt to study the subject seriously, they’re quickly weighed down by the mathematics…

Vorwärts in die Vergangenheit. Weiße Löcher sind das Gegenteil von Schwarzen Löchern – sie sind vermutlich ihre Abkömmlinge. Die einen ziehen alle Materie unwiderstehlich in sich hinein, die anderen geben ihre Information wieder frei. Sie sind ein weiteres großes Rätsel der Kosmologie, und noch gibt es keinen Beweis ihrer Existenz. Einsteins Gleichungen lassen sie aber vermuten, und mit Carlo Rovellis Quantentheorie sind Weiße Löcher theoretisch darstellbar.

The violent birth of the universe was only the first bang of a very bumpy ride. This unfathomably cacophonous beginning has spawned blasts, implosions, cosmic cannibalism, collisions, and countless other fleeting energetic events punctuating the cosmos. Although often brief, these transient...

Stargazing has shaped the entire course of human civilization. The rhythm of our ancestors' lives revolved around the stars, from cycles of agriculture to patterns of birth. How radically different would humanity be if our ancestors had looked up to the night sky and seen...nothing? In lyrical yet evidence-grounded meditations, Trotta imagines a world without stars, a dramatic alternate history in which we wouldn't understand gravity, where couldn't navigate or have much sense of time, and where our sense of the profound - of art and of the divine - was altered beyond recognition.

A mesmerizing trip to the strange world of white holes from the bestselling author of Seven Brief Lessons on Physics and The Order of Time Let us journey, with beloved physicist Carlo Rovelli, into the heart of a black hole. We slip beyond its horizon and tumble down this crack in the universe...

For Irwin Shapiro, science starts with questions. This book provides a broad and entertaining survey of major scientific discoveries that have changed our views of nature and, in turn, spawned further questions. Shapiro, an award-winning scientist and beloved teacher, separates his inquiry into three parts: looking up at the universe; looking down at the earth and its fossils; and looking in at the story of life. His framework encourages listeners to view science as a detective story—to observe and question nature and natural phenomena, and to base all conclusions on scientific evidence.

Let us journey, with beloved physicist Carlo Rovelli, into the heart of a black hole. Let us slip beyond its boundary, the horizon, and tumble - on and on - down this crack in the universe. As we plunge, we'll see geometry fold, we'll feel the equations draw tight around us. Eventually, we'll pass it: the remains of a star, deep and dense and falling further far. And then - the bottom. Where time and space end, and the white hole is born.

Spectroscopy, the study of the interaction between matter and electromagnetic radiation, may sound complex and esoteric, but at its heart lies a simple and profound idea: the colors of light can reveal the secrets of the universe. From the examination of distant stars to the analysis of molecules in a laboratory, spectroscopy is the key that unlocks the hidden stories encoded in light.

In the vast expanse of the cosmos, where stars twinkle in the night sky and galaxies swirl in the abyss, a remarkable dance of light and matter unfolds—a dance that has captivated the human imagination for centuries. This dance, illuminated by the science of spectroscopy, is what this book seeks to explore and explain. Spectroscopy, the study of the interaction between matter and electromagnetic radiation, may sound complex and esoteric, but at its heart lies a simple and profound idea: The colors of light can reveal the secrets of the universe.

In the vast expanse of the universe, where the night sky reveals countless stars, planets, and galaxies, the pursuit of knowledge knows no bounds. Among the many tools at the disposal of astronomers and astrophysicists, photometry stands as a beacon of precision and insight. This book, Photometry: Science, Sensitivity, and Its Connection to Astronomy, is your guided journey into the fascinating world of measuring and interpreting light in the cosmos.

O que é o tempo? É possível pará-lo? É possível matar Chronos? Autor do aclamado Gênesis, em que conta a história do surgimento do Universo, Guido Tonelli agora mergulha no tempo, essa incógnita que marca nossas vidas de modo implacável. O tempo não é um conceito abstrato. É uma...