SLAC Public Lecture Series
What is the Universe made of? This question has been asked as long as humans have been questioning, and astronomers and physicists are finally converging on an answer. The picture which has emerged from numerous complementary observations over the past decade is a surprising one: most of the matter in the Universe isn't visible, and most of the Universe isn't even made of matter. In this talk, I will explain what the rest of this stuff, known as "Dark Energy" is, how it is related to the so-called "Dark Matter", how it impacts the evolution of the Universe, and how we can study the dark universe using observations of light from current and future telescopes.