What is the interior structure of the Earth and how does it drive the
Earth's magnetic and geologic activity? We will review our current
knowledge of the interior of the Earth, how we measure it using
Seismology, the origins of the Earth's magnetic field, and discuss the
workings of plate tectonics. the Earth is a dynamic, geologically
active world, which ... Show More
Sep 2009
Lecture 6: The Geological Revolution - Deep Time and the Age of the Earth
The geological revolution revealed that the Earth is of great antiquity
and yet has a history we can read in the land. We will discuss ideas of cyclic and linear time, historical versus physical age estimates, the discovery of geological time, and
radiometric dating methods that ... Show More
46m 11s
Mar 2022
Comment calculer l'âge d'une étoile ?
La durée de vie d'une étoile peut nous renseigner sur sa composition et sur l'existence éventuelle de la vie dans le cosmos. mais, en dehors du Soleil, il est assez difficile de déterminer l'âge d'une étoile.
L'importance de la masse
En évaluant, grâce à la radioactivité, l'âge d ... Show More
1m 58s