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COSMO’21 Conference

The 24th International Conference on Particle Physics and Cosmology (COSMO’21) conference series will take place August 2–6, 2021 at the University of Illinois and online.

The conference will feature the latest developments in particle cosmology and particle astrophysics, including:

  • Dark matter
  • Dark energy
  • Modified gravity
  • Inflation and primordial physics
  • CMB
  • Large scale structure
  • Gravitational waves
  • Black holes
  • Particle astrophysics and neutrinos
  • Numerical cosmology
  • Transients as probes of cosmology and extreme physics
  • Ongoing and upcoming cosmological experiments


Poster Abstract Submission

Abstracts for posters may be submitted until July 28, 2021.


Abstract for contributed talks and posters were due July 9.  Thank you to all who submitted.  Selections for oral presentations are being made and that information posted soon.


Registration is open! Registration deadline is July 28. The fee is modest, and students without support can apply for a fellowship.

Register today



Conference Format and COVID-19

In view of ongoing impact of COVID-19 on international travel, COSMO’21 will be entirely in an online format. To make international participation easier, talks will be held from 10:00 a.m. – 4:00 p.m. U.S. Central time, and poster sessions will run both before and after.

2021 Gruber Prize in Cosmology

We are honored to announce that COSMO’21 will host the award ceremony for the 2021 Gruber Cosmology Prize. As part of the proceedings, prize recipients Marc Kamionkowski, Uroš Seljak, and Matias Zaldarriaga will each give a brief presentation on their work. The award ceremony will be online, open to the public, and free of charge.

In addition, early-career scientists attending COSMO’21 will have an opportunity to meet online with the the award recipients.

Congratulations to Profs. Kamionkowski, Seljak, and Zaldarriaga!

Outreach video competition

Submit your short video to bring the excitement of cosmology to the public!   Conference attendees will vote, and the top videos will be shown on the last day of the meeting.


If you have any questions please contact


The COSMO’21 Conference would like to thank its sponsors: