There are so many good ways to introduce the fascinating subject of Dark Energy, but just this past week we were treated to two (Adam Reiss' Sci Am article will be covered in a second post, Dark Energy 102)
For starters let's begin with Katherine Freese's excellent lecture at The Perimeter Institute in Waterloo, Ontario. For excellent commentary, I strongly recommend reading Ethan Siegal's live blog of the event at "Starts with a Bang", here.
Since this is "101", we will be adding links in the weeks ahead, as more news develops about Dark energy' past. For the future, see Dark Energy 102.
Image credit: Perimeter Institute / @MaricaRosengard.