TIL Hisako Koyama, a female Japanese astronomer who hand drew sunspots every day for more than 40 years. Her detailed sketches aid researchers in studying solar cycles and the sun's magnetic fields
![](https://d3i6fh83elv35t.cloudfront.net/static/2017/10/Young_Ms_Koyama-copy_crop1.png)
TIL Hisako Koyama, a female Japanese astronomer who hand drew sunspots every day for more than 40 years. Her detailed sketches aid researchers in studying solar cycles and the sun's magnetic fields https://www.pbs.org/newshour/science/japanese-hidden-figure-enlightened-world-sunspot-sketches Specialist_Check February 21, 2022 at 11:48PM
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