Journal Highlights

New study highlights ‘hidden figure’ of sun-watchers

Press Release—

Few people have heard of Hisako Koyama, but the dedicated female solar observer, born in Tokyo in 1916, created one of the most important sunspot records of the past 400 years, according to new research.

A new study recounting Koyama’s life finds she created detailed sunspot drawings for more than 40 years. Solar scientists recently used Koyama’s archive of more than 10,000 drawings to establish a continuous record of sunspot numbers stretching back to 1610. This sunspot reconstruction can help scientists better understand the solar cycle and how solar activity influences events on Earth...more