Category Archives: Astrophysique

Classical Mechanics

Our exploration of the theoretical underpinnings
of modern physics begins with classical mechanics,
the mathematical physics worked out by Isaac Newton
(1642–1727) and later by Joseph Lagrange (1736–1813)
and William Rowan Hamilton (1805–1865). We will
start by taking a close look at Newtonian mechanics
and the integral concepts of force, momentum, and
gravity. Later, when we turn our attention to Lagrangian
and Hamiltonian mechanics, we will delve into potential
and kinetic energy, the principle of least action, and
chaos theory.

This course marks the beginning of a six-quarter
sequence of courses that will explore the essential
theoretical foundations of modern physics.
The topics covered will include classical mechanics,
quantum mechanics, the general and special theories
of relativity, electromagnetism, cosmology, and
black holes. While these courses build upon one
another, each course can be taken independently
as well. Both individually and collectively they
will let students attain the “theoretical minimum”
for thinking intelligently about modern physics.

Sponsored by the Stanford Continuing Studies Program.

Originally presented by the Stanford Continuing Studies Program.

Professor Susskind’s Book, “The Theoretical Minimum” now available:
http://www.theoreticalminimumbook.com/

Vivons-nous dans un univers ou un multivers?

Conférence donnée à l’IAP le 7 février 2012 par Aurélien BARRAU, astrophysicien au Laboratoire de Physique Subatomique et de Cosmologie de Grenoble.

Dans cette conférence, je proposerai une introduction simple à la cosmologie d’aujourd’hui et aux concepts physiques qui la sous-tendent. De la relativité générale à la théorie des cordes, en passant par les trous noirs et la gravitation quantique, nous en viendrons à interroger le statut de notre univers lui-même. Se pourrait-il qu’il ne soit pas unique ? Peut-on penser dans un “multivers” ? Peut-on y faire des prédictions ? Quelles ramifications philosophiques pourraient naître de cette hypothèse d’univers multiples ?

A la découverte de l’univers

ExplorUnivers (Université de Nantes) par fr-universite-numerique

Peut-on vivre sur Mars ? Quelle est l’exoplanète habitable la plus proche ? Combien d’étoiles naissent par an dans une galaxie ? Et la Terre, d’où vient-elle ? Ce MOOC aborde notre compréhension actuelle de l’univers.

Alien Worlds: The Science of Exoplanet Discovery and Characterization

Alien Worlds will explore the techniques that are used to discover and characterize the thousands of planets (called exoplanets) known outside of our solar system.

About this Course

Have you ever wondered about planets in other solar systems? Have you ever thought about the possibility of life elsewhere in the Universe? For the first time in human history, we know that planets around other stars not only exist, but are common!

Alien Worlds focuses on the search and characterization of planets orbiting other stars (called extrasolar planets or “exoplanets”). Over the course of nine modules, we will learn some of the techniques used to discover the thousands of known exoplanets and will discuss how we can use basic scientific tools to characterize the sizes, masses, compositions, and atmospheres of exoplanets. We will also learn about the diversity of stars in the Galaxy to understand how stellar properties affect exoplanet detection techniques and influence planetary formation and habitability.

In addition to the exploration of exoplanets, students in Alien Worlds will gain a basic understanding of light, gravity and motion, and be introduced to some of the most extreme life on planet Earth. We will hear from experts at the forefront of exoplanet science and interact with other participants and instructors through social media and online tools. Students will leave Alien Worlds with a better understanding of their place in the Universe and the skills to comprehend the wealth of new discoveries surrounding the countless worlds around distant stars.