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Ms. Koyama with the 20-cm telescope she used at the National Museum of Nature and Science, in 1951 Credit: Asahigraph. WASHINGTON D.C. — 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 deta
WASHINGTON, DC — Scientists suggest in a new study the existence of a planetary object called a “synestia,” a huge, spinning, donut-shaped mass of hot, vaporized rock, formed as planet-sized objects smash into each other. At one point early in its history, Earth was likely a synestia, said Sarah Stewart, a planetary scientist at the University of California Davis and co-author of the new study in
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