The 21st Century H-R Diagram: The Power of Precision Photometry

Mon 23 Apr 2018
Thu 26 Apr 2018

Space Telescope Science Institute (STScI)
3700 San Martin Drive
Baltimore, MD 21218

Contact Information:

Have questions? Please contact Martha Devaud.


The Hertzsprung-Russell Diagram has revolutionized stellar physics over the past century. It remains an essential tool in the 21st century for studying stellar properties and behavior. New observing capabilities have improved precision and accuracy, which in turn have uncovered new populations of stars and revealed limits in our physical understanding of their structure and evolution. Now is the time to prepare for the next generation of facilities that will bring forward a new wave of diagnostics to analyze the Hertzsprung-Russell Diagram.

Please join us in Baltimore for the 2018 Spring Symposium. Discussions will include:

  • Simple stellar and multiple populations in the Milky Way and nearby galaxies.
  • Stellar models and synthetic H-R diagrams.
  • Stellar populations in distant galaxies.
  • Young stellar objects and evolution to the main sequence.
  • Variability, transients, and the H-R diagram.
  • Preparing for future missions and observatories.

Space permitting, symposium talks are open to astronomers from all local (Maryland and Washington, DC) institutions without registering. However, seating is not guaranteed in the auditorium without registering for the symposium. Locals attending the symposium are requested to refrain from partaking in the refreshments provided. Locals wishing to partake in the refreshments will need to register and will receive a badge for admission after payment of the registration fee.


The Space Telescope Science Institute (STScI) is a short ride away from major airports and train stations. Find information related to driving directions and relevant transportation resources on our Getting Here page.

Important Dates:
January 8 Registration opens
February 1 Abstract submission deadline for contributed talks and posters
March 1 Decisions on contributed talks communicated to submitters
March 23 Registration ends

Date Event Time
Monday, April 23, 2018 Symposium 8:00 a.m. - 5:00 p.m.
Monday, April 23, 2018 Opening Reception 5:00 p.m. - 8:00 p.m.
Tuesday, April 24, 2018 Symposium 8:00 a.m. - 5:00 p.m.
Wednesday, April 25, 2018 Symposium 8:00 a.m. - 5:00 p.m.
Wednesday, April 25, 2018 SDAS beer with STScI staff 5:00 p.m. - 8:00 p.m.
Thursday, April 26, 2018 Symposium 8:00 a.m. - 1:00 p.m.
Thursday, April 26, 2018 CHARA Workshop* 2:00 p.m. - 5:00 p.m.


*The CHARA Community Workshop will occur on Thursday afternoon after the conclusion of the symposium and is open to symposium participants if you wish to attend. There is no registration fee but you must register separately for this workshop. The CHARA workshop will provide tutorials on interferometry, the science capabilities of the CHARA Array, and how to prepare and apply for observing time. For more information or to register for the workshop, please visit CHARA's website.

Please see the Symposium Agenda for a full breakdown of sessions.

The 21st Century H-R Diagram: The Power of Precision Photometry Materials

April 23, 2018 - April 26, 2018

April 23, 2018 

85 KB

April 23, 2018 

66 KB

April 23, 2018 

20 MB