Loading Events
  • This event has passed.

The Accelerating Expanding Universe: Dark Matter, Dark Energy, and Einstein’s Cosmological Constant

Saturday, September 14, 2019 @ 10:00 AM-11:30 AM


Washington University in St. Louis
Crow Hall, Room 201, St. Louis, MO 63105 United States
+ Google Map

FREE and OPEN to ALL. Junior Academy members, middle and high school students welcome and encouraged to attend. Registration not required.

Parking is available in the East End Parking Garage. Garage entrance is Wrighton Way off Forsyth Boulevard. (#95 | J4 on Campus Map)

Featured Speaker: Bharat Ratra, Ph.D., Distinguished Professor of Physics, Department of Physics, Kansas State University

Dark energy is the leading candidate for the mechanism that is responsible for causing the cosmological expansion to accelerate. Professor Bharat Ratra describes the astronomical data which persuade cosmologists that (as yet undetected) dark energy and dark matter are by far the main components of the energy budget of the universe at the present time. He reviews how these observations have led to the development of a quantitative “standard” model of cosmology that describes the evolution of the universe from an early epoch of inflation to the complex hierarchy of structure seen today; and he discusses the basic physics, and the history of ideas, on which this model is based.

About the speaker: Bharat Ratra works in the areas of cosmology and astroparticle physics, and researches the structure and evolution of the universe. Two of his current principal interests are developing models for the large scale matter and radiation distributions in the universe and testing these models by comparing predictions to observational data. In 1988, Dr. Ratra and Jim Peebles proposed the first dynamical dark energy model.


The Accelerating Expanding Universe is Saturday Morning Physics Public Lecture presented by Academy friend and partner, Washington University in St. Louis Department of Physics.



Saturday, September 14, 2019
10:00 AM-11:30 AM
Event Category:


Washington University in St. Louis Department of Physics
Crow Hall, Room 201
St. Louis, MO 63105 United States
+ Google Map