While sirens blared and enemy planes dove overhead, Hisako Koyama hid under her futon, holding a small flashlight over her variable star charts. During air raids, the city of Tokyo turned off its lights, leaving only clear, dark skies above—exactly what the young astronomer needed to observe the heavens. As World War II raged, and guided by a path lit by a rogue spirit deep within, Koyama made her first forays into the work that would captivate her all her life. Initially, she wanted to study the moon. But her…
