How have we pieced together the geological history of the Earth?
This lecture reviews the different types of rocks and the cycle
of transformation between them, with particular emphasis on stratigraphy.
I will outline the 4 major Eons in Earth's history, and focus on the
earliest Hadean Eon which proceeded from the formation of the Earth to
the end of th ... Show More
Sep 2009
Lecture 2: Astronomical Numbers
An introduction and review of the basic notation and physical units we will be
using throughout this course. In particular, we will be using the
Metric (SI) system for lengths, masses, times, and temperatures, and
special astronomical units for distances (AU and Light Years) and ... Show More
43m 56s
<p>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.</p><br><p>L'importance de la masse</p><br><p>En évaluant, grâce à la ... Show More
