How to imagine the universe? (Replay)

The diffuse light of the Andromeda galaxy comes from the hundreds of billions of stars that compose it. NASA / Robert Gendler

By: Caroline Lachowsky

How to imagine the universe? From the origins: the Big Bang and the birth of galaxies, its expansion, to the topography of exoplanets that we never stop discovering tens or even thousands of light years around other suns than ours .

Publicity

How to understand such a finite space-time? infinite ? Knowing that we do not know the matter that composes it and that each new window of observation in astrophysics opens on new questions and new staggering hypotheses like that of multi-universes and other forms of extraterrestrial life. Where are we exactly? Why is our imagination always less vast than the cosmos?

Let us take stock of the progress of our knowledge in cosmology and the extent of our ignorance.

With:

  • Françoise Combes , astrophysicist and professor at the Collège de France in the " Galaxies and cosmology " chair. Author of What do I know? on The Big Bang
  • Frédéric Schmidt, professor in geology of planetary surfaces, Paris-Saclay University.

To find out more about exoplanets:

  • an online 3D visualization tool to discover exoplanets
  • simulation videos here and here

(March 18, 2019 replay)

Newsletter With the Daily Newsletter, find the headlines directly in your mailbox

Subscribe

Follow all international news by downloading the RFI application

google-play-badge_FR

  • Science benchmarks
  • Space

On the same subject

Around the question

What particles is the Universe made of?

Around the question

Why is gravity the engine of the Universe?

Around the question

What fate for our Universe?