Thursday | November 23, 2017
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Introducing: ‘The Diagram that Spawned a Galaxy’

Gregory D. Wirth, support astronomer at the W.M. Keck Observatory, will lead a lively talk at 7 p.m. Friday in the ‘Imiloa planetarium.

He will focus on the plotting of stars’ luminosity and surface temperature during the astronomy center’s Maunakea Skies talk event “The Diagram that Spawned a Galaxy.”

Wirth will share the fascinating story about how scientists used careful observations of stars to develop the most important diagram in modern astronomy, Hertzsprung-Russell Diagram, and used it as a “Rosetta Stone” to unlock the secrets of how stars are born, live and die, ultimately leading to the present understanding of the true shape and size of the Milky Way.

Wirth joined Keck’s staff in 1998 and has served as the primary support scientist on the LRIS, DEIMOS, ESI and KCWI instruments. He specializes in studying the evolution of galaxies in rich clusters.

The program will be hosted by Chris Phillips, ‘Imiloa planetarium staffer, who will provide observational highlights of the current night sky over Hawaii, pointing out prominent constellations and stars that can be seen during this time of year.

Admission is $10.

Visit or call 969-9703 for more information.


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