The Cosmic Distance Ladder

How do we know how far away things are in the universe?  What Yardsticks to we use and how accurate are they?

On Monday, March 31, a workshop will be held at The Space Telescope Science Institute to discuss these topics and more.  As an added bonus, Dr. Adam Riess, winner of the 2011 Nobel Prize in Physics will join +Tony Darnell and Mario Livio to share his unique insights into this important topic in a hangout Monday Evening.

Dr. Riess won his Nobel Prize using one of the best yardsticks in the universe to measure distance: Type 1a supernova.  We hope you can join us and bring your questions!