Cool Stars 20.5 - virtually cool

March 2-4 2021, virtual meeting

The "Cambridge Workshops of Cool Stars, Stellar Systems and the Sun" are held biennially and have evolved to be the premier conference series for cool star research.

With the ongoing pandemic, the organizers of Cool Stars 21 consider it unlikely we will be able to meet in person in the summer of 2021. This would put a four year gap between our meetings for the first time. Therefore we have decided to hold a virtual conference to keep everyone in our field up to date. But don't worry, we still plan to meet in Toulouse in mid-2022.

SOC and LOC plan the following important dates:
  • Jan 8, 2021: Deadline for abstracts for an oral contribution (talk or poster with haiku)
  • Feb 12, 2021: Speakers announced
  • Feb 19, 2021: Deadline to suggest a topical interest room
  • Feb 26, 2021: Deadline for poster abstracts without haiku
  • Feb 26, 2021: Prerecorded haikus submitted to LOC
  • March 2-4, 2021: Virtual meeting
  • July 4, 2022: Cool Stars 21! Live and in person!

Abstract submission

We are still accepting posters (one poster per perticipant). Simply upload your poster (detailed instructions) and the SOC will accept posters that are appropriate in content and topic for this conference.

Registration and abstract submission

Use the form below to register for the conference. Registration is free of charge, but required to attend the live sessions.


Invited speakers should plan for a talk of 24 min plus 6 min for questions. Contributed talks should be 12 min long plus 3 min for questions.

Posters and Haikus

      The pandemic once out
      Cool stars enter
      The conference game.*
alexis lavail
* shameless adaptation of
      The lamp once out
      Cool stars enter
      The window frame.
Natsume Soseki